Carriage Bolts
Carriage bolts are suitable for fastening wooden or metallic surfaces with each other in automotive, manufacturing, woodworking and maintenance & repair applications. Raptor Supplies
...Read more -
1/4"-20 Coarse Zinc Plated Grade 2 Steel Square Neck Carriage Bolts
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D| Style | Model | Head Dia. | Square Height | Thread Style | Head Style | Neck Width | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08305.025.0075 | €6.21 | 100 | |||||||||
| A | U08305.025.0100 | €10.07 | 100 | |||||||||
| A | U08305.025.0125 | €10.66 | 100 | |||||||||
| A | U08305.025.0150 | €11.08 | 100 | |||||||||
| A | U08305.025.0175 | €14.13 | 100 | |||||||||
| A | U08305.025.0200 | €14.16 | 100 | |||||||||
| B | U08305.025.0225 | €18.85 | 100 | |||||||||
| A | U08305.025.0250 | €15.95 | 100 | |||||||||
| B | U08305.025.0275 | €24.20 | 100 | |||||||||
| A | U08305.025.0062 | €9.56 | 100 | |||||||||
| C | U08305.025.0300 | €8.71 | 50 | |||||||||
| C | U08305.025.0350 | €13.34 | 50 | |||||||||
| C | U08305.025.0400 | €11.32 | 50 | |||||||||
| D | U08305.025.0500 | €20.83 | 50 | |||||||||
| D | U08305.025.0450 | €19.76 | 50 |
FABORY -
M12 x 1.75 Metric Coarse Plain Grade A2 Stainless Steel Square Neck Carriage Bolts
A
B| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M51500.120.0030 | €36.14 | 25 | |||||||||
| B | M51500.120.0040 | €21.48 | 10 |
FOREVERBOLT -
1/4"-20 Coarse NL-19 Grade 18-8 Stainless Steel Square Neck Carriage Bolts
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B| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FBCB142025P25 | €54.91 | 25 | |||||||||
| A | FBCB14202P25 | €51.44 | 25 | |||||||||
| A | FBCB142035P25 | €76.82 | 25 | |||||||||
| A | FBCB14203P25 | €60.30 | 25 | |||||||||
| B | FBCB142045P10 | €38.50 | 10 | |||||||||
| B | FBCB14204P10 | €28.27 | 10 | |||||||||
| B | FBCB142055P10 | €42.90 | 10 | |||||||||
| B | FBCB14205P10 | €34.84 | 10 | |||||||||
| A | FBCB142015P50 | €81.27 | 50 | |||||||||
| A | FBCB14201P50 | €75.00 | 50 | |||||||||
| B | FBCB14206P10 | €47.02 | 10 |
FOREVERBOLT -
1/2"-13 Coarse NL-19 Grade 18-8 Stainless Steel Square Neck Carriage Bolts
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C| Style | Model | Thread Style | Head Style | Square Height | Neck Width | Head Dia. | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FBCB121P10 | €48.18 | 10 | |||||||||
| A | FBCB1225P10 | €71.83 | 10 | |||||||||
| B | FBCB1245P5 | €43.66 | 5 | |||||||||
| B | FBCB124P5 | €46.03 | 5 | |||||||||
| A | FBCB1215P10 | €44.58 | 10 | |||||||||
| A | FBCB122P10 | €76.16 | 10 | |||||||||
| A | FBCB1235P5 | €41.39 | 5 | |||||||||
| A | FBCB123P5 | €42.64 | 5 | |||||||||
| B | FBCB1255P5 | €70.70 | 5 | |||||||||
| B | FBCB125P5 | €66.91 | 5 | |||||||||
| C | FBCB126P5 | €68.28 | 5 |
FABORY -
M5 x 0.8 Metric Coarse Plain Grade A2 Stainless Steel Square Neck Carriage Bolts
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C
D| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M51500.050.0016 | €24.32 | 100 | |||||||||
| B | M51500.050.0020 | €29.51 | 100 | |||||||||
| B | M51500.050.0025 | €22.73 | 100 | |||||||||
| B | M51500.050.0030 | €34.25 | 100 | |||||||||
| C | M51500.050.0040 | €40.03 | 100 | |||||||||
| D | M51500.050.0050 | €55.77 | 100 |
FABORY -
M16 x 2 Metric Coarse Zinc Plated Class 4.6 Steel Square Neck Carriage Bolts
A
B| Style | Model | Head Style | Thread Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M08250.160.0060 | €92.01 | 25 | |||||||||
| A | M08250.160.0070 | €39.83 | 10 | |||||||||
| B | M08250.160.0100 | €61.48 | 10 | |||||||||
| B | M08250.160.0140 | €87.61 | 10 | |||||||||
| B | M08250.160.0080 | €47.31 | 10 |
FABORY -
M12 x 1.75 Metric Coarse Zinc Plated Class 4.6 Steel Square Neck Carriage Bolts
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F| Style | Model | Head Style | Thread Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M08250.120.0100 | €75.17 | 25 | |||||||||
| B | M08250.120.0070 | €67.01 | 25 | |||||||||
| A | M08250.120.0080 | €70.70 | 25 | |||||||||
| B | M08250.120.0075 | €57.72 | 25 | |||||||||
| C | M08250.120.0030 | €88.34 | 50 | |||||||||
| D | M08250.120.0300 | €82.06 | 10 | |||||||||
| E | M08250.120.0240 | €66.09 | 10 | |||||||||
| B | M08250.120.0050 | €95.03 | 50 | |||||||||
| B | M08250.120.0040 | €100.55 | 50 | |||||||||
| D | M08250.120.0400 | €62.54 | 5 | |||||||||
| E | M08250.120.0180 | €55.78 | 10 | |||||||||
| A | M08250.120.0170 | €57.86 | 10 | |||||||||
| A | M08250.120.0150 | €110.39 | 25 | |||||||||
| A | M08250.120.0110 | €93.17 | 25 | |||||||||
| B | M08250.120.0065 | €66.83 | 25 | |||||||||
| A | M08250.120.0090 | €77.56 | 25 | |||||||||
| F | M08250.120.0060 | €94.57 | 50 |
FABORY -
M10 x 1.5 Metric Coarse Zinc Plated Class 4.6 Steel Square Neck Carriage Bolts
ABCDE| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M08250.100.0020 | €72.66 | 100 | |||||||||
| B | M08250.100.0060 | €70.15 | 50 | |||||||||
| B | M08250.100.0035 | €53.47 | 50 | |||||||||
| C | M08250.100.0120 | €64.59 | 25 | |||||||||
| B | M08250.100.0070 | €66.66 | 50 | |||||||||
| B | M08250.100.0055 | €75.38 | 50 | |||||||||
| B | M08250.100.0050 | €64.64 | 50 | |||||||||
| B | M08250.100.0045 | €70.70 | 50 | |||||||||
| B | M08250.100.0040 | €51.58 | 50 | |||||||||
| D | M08250.100.0025 | €84.45 | 100 | |||||||||
| B | M08250.100.0030 | €86.91 | 100 | |||||||||
| B | M08250.100.0065 | €62.95 | 50 | |||||||||
| C | M08250.100.0150 | €82.54 | 25 | |||||||||
| C | M08250.100.0130 | €57.49 | 25 | |||||||||
| C | M08250.100.0110 | €57.51 | 25 | |||||||||
| C | M08250.100.0100 | €95.00 | 50 | |||||||||
| C | M08250.100.0080 | €85.04 | 50 | |||||||||
| B | M08250.100.0075 | €70.70 | 50 | |||||||||
| E | M08250.100.0200 | €93.03 | 25 |
FABORY -
M6 x 1 Metric Coarse Zinc Plated Class 4.6 Steel Square Neck Carriage Bolts
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C
D| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M08250.060.0030 | €34.62 | 100 | |||||||||
| A | M08250.060.0035 | €36.83 | 100 | |||||||||
| A | M08250.060.0040 | €36.97 | 100 | |||||||||
| A | M08250.060.0045 | €34.07 | 100 | |||||||||
| A | M08250.060.0050 | €40.12 | 100 | |||||||||
| B | M08250.060.0070 | €43.40 | 100 | |||||||||
| B | M08250.060.0075 | €49.39 | 100 | |||||||||
| B | M08250.060.0080 | €52.48 | 100 | |||||||||
| C | M08250.060.0016 | €31.45 | 100 | |||||||||
| A | M08250.060.0020 | €33.19 | 100 | |||||||||
| A | M08250.060.0025 | €29.57 | 100 | |||||||||
| B | M08250.060.0055 | €49.77 | 100 | |||||||||
| B | M08250.060.0060 | €39.96 | 100 | |||||||||
| B | M08250.060.0090 | €59.27 | 100 | |||||||||
| B | M08250.060.0100 | €62.70 | 100 | |||||||||
| D | M08250.060.0110 | €77.91 | 100 |
FABORY -
M5 x 0.8 Metric Coarse Zinc Plated Class 4.6 Steel Square Neck Carriage Bolts
ABC| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M08250.050.0016 | €20.73 | 100 | |||||||||
| B | M08250.050.0020 | €21.97 | 100 | |||||||||
| B | M08250.050.0025 | €18.35 | 100 | |||||||||
| B | M08250.050.0030 | €23.66 | 100 | |||||||||
| B | M08250.050.0040 | €29.61 | 100 | |||||||||
| B | M08250.050.0045 | €33.45 | 100 | |||||||||
| B | M08250.050.0050 | €33.37 | 100 | |||||||||
| B | M08250.050.0035 | €20.29 | 100 | |||||||||
| C | M08250.050.0080 | €70.63 | 100 |
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3/4"-10 Coarse Zinc Plated Grade 5 Steel Square Neck Carriage Bolts
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B
C| Style | Model | Thread Style | Head Style | Head Dia. | Square Height | Neck Width | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B08320.075.0400 | €144.91 | 40 | |||||||||
| B | U08320.075.0500 | €155.09 | 10 | |||||||||
| C | U08320.075.0200 | €70.03 | 10 | |||||||||
| A | U08320.075.0300 | €28.27 | 10 | |||||||||
| A | U08320.075.0400 | €68.93 | 10 |
GRAINGER -
5/8"-11 Coarse Zinc Plated Grade 5 Steel Square Neck Carriage Bolts
ABCD
E| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08320.062.0200 | €11.92 | 10 | |||||||||
| B | U08320.062.0500 | €36.99 | 10 | |||||||||
| C | U08320.062.0250 | €40.00 | 10 | |||||||||
| D | U08320.062.0300 | €45.17 | 10 | |||||||||
| D | U08320.062.0350 | €49.43 | 10 | |||||||||
| B | U08320.062.0400 | €58.27 | 10 | |||||||||
| E | U08320.062.0600 | €39.84 | 10 |
GRAINGER -
5/8"-11 Coarse Hot Dipped Galvanized Grade 2 Steel Square Neck Carriage Bolts
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B
C| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08307.062.0200 | €33.75 | 10 | |||||||||
| B | U08307.062.0400 | €44.52 | 10 | |||||||||
| C | U08307.062.0250 | €41.39 | 10 | |||||||||
| C | U08307.062.0300 | €44.94 | 10 | |||||||||
| B | U08307.062.0500 | €24.69 | 10 |
GRAINGER -
5/8"-11 Coarse Zinc Plated Grade 2 Steel Square Neck Carriage Bolts
AB
C
D| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08305.062.0350 | €22.46 | 10 | |||||||||
| A | U08305.062.0400 | €26.42 | 10 | |||||||||
| A | U08305.062.0450 | €27.79 | 10 | |||||||||
| A | U08305.062.0300 | €20.30 | 10 | |||||||||
| B | U08305.062.0150 | €16.13 | 10 | |||||||||
| B | U08305.062.0200 | €10.13 | 10 | |||||||||
| A | U08305.062.0500 | €29.18 | 10 | |||||||||
| C | U08305.062.0600 | €35.93 | 10 | |||||||||
| D | U08305.062.0250 | €19.94 | 10 |
GRAINGER -
3/4"-10 Coarse Zinc Plated Grade 2 Steel Square Neck Carriage Bolts
ABC| Style | Model | Thread Style | Tensile Strength | Head Style | Neck Width | Head Dia. | Square Height | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08305.075.0300 | €32.18 | 10 | |||||||||
| B | U08305.075.0200 | €24.35 | 10 | |||||||||
| A | U08305.075.0400 | €46.24 | 10 | |||||||||
| A | U08305.075.0500 | €43.86 | 10 | |||||||||
| C | U08305.075.0700 | €29.23 | 5 | |||||||||
| C | U08305.075.0800 | €32.91 | 5 | |||||||||
| C | U08305.075.0600 | €46.29 | 10 |
| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Thread Fit | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08300.043.0125 | €24.84 | 50 | |||||||||
| A | U08300.043.0150 | €28.82 | 50 | |||||||||
| A | U08300.043.0200 | €39.29 | 50 | |||||||||
| A | U08300.043.0250 | €21.59 | 25 |
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5/16"-18 Coarse Zinc Plated Grade 2 Steel Square Neck Carriage Bolts
ABCD
E| Style | Model | Thread Style | Head Style | Head Dia. | Square Height | Neck Width | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U08305.031.0075 | €13.27 | 100 | |||||||||
| A | U08305.031.0100 | €16.00 | 100 | |||||||||
| A | U08305.031.0125 | €16.76 | 100 | |||||||||
| A | U08305.031.0150 | €18.91 | 100 | |||||||||
| B | U08305.031.0175 | €31.29 | 100 | |||||||||
| A | U08305.031.0200 | €23.35 | 100 | |||||||||
| A | U08305.031.0250 | €24.74 | 100 | |||||||||
| C | U08305.031.0350 | €16.90 | 50 | |||||||||
| C | U08305.031.0400 | €20.63 | 50 | |||||||||
| C | U08305.031.0450 | €19.70 | 50 | |||||||||
| D | U08305.031.0500 | €28.61 | 50 | |||||||||
| D | U08305.031.0550 | €38.27 | 50 | |||||||||
| C | U08305.031.0300 | €11.39 | 50 | |||||||||
| B | U08305.031.0275 | €22.90 | 50 | |||||||||
| B | U08305.031.0225 | €34.16 | 100 | |||||||||
| E | U08305.031.0600 | €27.29 | 50 |
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3/8"-16 Coarse Plain Grade 18-8 Stainless Steel Square Neck Carriage Bolts
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C
D| Style | Model | Thread Style | Head Style | Head Dia. | Square Height | Thread Fit | Neck Width | Tensile Strength | Thread Direction | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | U51500.037.0075 | €19.51 | 25 | |||||||||
| B | 1VE20 | €31.12 | 25 | |||||||||
| B | 1VE22 | €11.28 | 10 | |||||||||
| A | U51500.037.0100 | €42.78 | 100 | |||||||||
| B | U51500.037.0125 | €49.44 | 100 | |||||||||
| B | U51500.037.0150 | €51.12 | 100 | |||||||||
| B | U51500.037.0250 | €36.08 | 50 | |||||||||
| C | U51500.037.0300 | €22.40 | 25 | |||||||||
| C | U51500.037.0350 | €25.78 | 25 | |||||||||
| C | U51500.037.0400 | €32.01 | 25 | |||||||||
| D | U51500.037.0450 | €12.57 | 10 | |||||||||
| D | U51500.037.0500 | €14.13 | 10 | |||||||||
| B | U51500.037.0200 | €33.90 | 50 | |||||||||
| D | U51500.037.0600 | €20.98 | 10 |
FOREVERBOLT -
3/8"-16 Coarse NL-19 Grade 18-8 Stainless Steel Square Neck Carriage Bolts
Carriage bolts are suitable for fastening wooden or metallic surfaces with each other in automotive, manufacturing, woodworking and maintenance & repair applications. They usually feature a domed head without a drive and require a nut & washer to pull them into the material.
These coarsely threaded bolts have fewer threads per inch than fine threads for quick installation and excellent resistance to stripping. They feature Grade 18-8 stainless steel construction for strength and NL-19 coating for protection against salt spray and other corrosive elements. These bolts further feature a square neck design to prevent them from rotating during installation, making it easier to tighten the nut.
Carriage bolts are suitable for fastening wooden or metallic surfaces with each other in automotive, manufacturing, woodworking and maintenance & repair applications. They usually feature a domed head without a drive and require a nut & washer to pull them into the material.
These coarsely threaded bolts have fewer threads per inch than fine threads for quick installation and excellent resistance to stripping. They feature Grade 18-8 stainless steel construction for strength and NL-19 coating for protection against salt spray and other corrosive elements. These bolts further feature a square neck design to prevent them from rotating during installation, making it easier to tighten the nut.
AB| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Head Width | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FBCB3815P25 | €94.09 | 25 | |||||||||
| A | FBCB382P25 | €102.59 | 25 | |||||||||
| B | FBCB3855P10 | €77.65 | 10 | |||||||||
| B | FBCB385P10 | €70.70 | 10 | |||||||||
| A | FBCB381P25 | €81.91 | 25 | |||||||||
| A | FBCB3825P25 | €105.34 | 25 | |||||||||
| A | FBCB3835P10 | €65.45 | 10 | |||||||||
| A | FBCB383P25 | €127.22 | 25 | |||||||||
| B | FBCB3845P10 | €70.70 | 10 | |||||||||
| B | FBCB384P20 | €113.79 | 20 | |||||||||
| B | FBCB386P10 | €78.38 | 10 |
FABORY -
M10 x 1.5 Metric Coarse Plain Grade A2 Stainless Steel Square Neck Carriage Bolts
A
BC| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M51500.100.0030 | €56.27 | 50 | |||||||||
| A | M51500.100.0035 | €47.48 | 50 | |||||||||
| A | M51500.100.0040 | €16.13 | 10 | |||||||||
| A | M51500.100.0060 | €74.25 | 25 | |||||||||
| A | M51500.100.0070 | €19.74 | 10 | |||||||||
| B | M51500.100.0080 | €28.27 | 10 | |||||||||
| B | M51500.100.0090 | €25.19 | 10 | |||||||||
| B | M51500.100.0100 | €33.63 | 10 | |||||||||
| C | M51500.100.0020 | €55.25 | 50 | |||||||||
| C | M51500.100.0025 | €105.99 | 50 | |||||||||
| A | M51500.100.0045 | €59.53 | 50 | |||||||||
| A | M51500.100.0050 | €44.15 | 25 | |||||||||
| B | M51500.100.0120 | €28.27 | 10 |
FABORY -
M8 x 1.25 Metric Coarse Plain Grade A2 Stainless Steel Square Neck Carriage Bolts
AB
CDE| Style | Model | Thread Style | Head Style | Neck Width | Head Dia. | Square Height | Tensile Strength | Thread Direction | Neck Height | Price | Pkg. Qty. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M51500.080.0016 | €28.27 | 50 | |||||||||
| B | M51500.080.0040 | €57.92 | 50 | |||||||||
| B | M51500.080.0050 | €39.00 | 50 | |||||||||
| C | M51500.080.0080 | €27.68 | 25 | |||||||||
| A | M51500.080.0020 | €23.08 | 50 | |||||||||
| D | M51500.080.0025 | €52.53 | 50 | |||||||||
| D | M51500.080.0030 | €41.38 | 50 | |||||||||
| D | M51500.080.0035 | €43.63 | 50 | |||||||||
| B | M51500.080.0060 | €77.08 | 50 | |||||||||
| E | M51500.080.0070 | €31.15 | 25 | |||||||||
| C | M51500.080.0100 | €31.71 | 25 | |||||||||
| C | M51500.080.0110 | €55.64 | 25 |
Carriage Bolts
Carriage bolts are suitable for fastening wooden or metallic surfaces with each other in automotive, manufacturing, woodworking and maintenance & repair applications. Raptor Supplies offers a wide array of carriage bolts from brands like Fabory, Snap-Loc, Earnest, B & P Manufacturing, and more. They usually feature a domed head without a drive and hence, require a nut & washer to pull them into the material.
Frequently Asked Questions
What is the difference between carriage bolts & hex head lag screws?
- Carriage bolts have a flat end, whereas hex head lag bolts feature a pointed tip.
- The flat end of carriage bolts can accept a washer & nut for secure installation.
- Lag bolts have wide threads and are screwed directly into wood, without requiring nuts to complete the assembly.
What is the difference between carriage bolts and plow bolts?
- Carriage bolts are generally used in smaller equipment like snowplows attached to pick-up trucks, whereas plow bolts are used in larger plow equipment like excavators.
- Carriage bolts have a flat profile across the bottom of the head, while plow bolts have an angled head for fitting onto countersunk holes.
Why are carriage bolts named so?
Carriage bolts became popular when they started getting used in the manufacturing of carriages & carriage wheels. Thus, they got named 'carriage bolts'.
What does the strength grades / classes mean in carriage bolts?
- The grade or class of a fastener indicates its strength & compatibility with the respective nut / threaded rod / screw / bolt / washer.
- Generally, the higher the grade, the higher the strength of the fastener.
- SAE specifies grades for Imperial-sized carriage bolts. Carriage bolts having the same SAE strength grade as a nut should be used together.
- ISO rates Metric-sized carriage bolts. Carriage bolts having the same first digit as a nut are meant to be used together.
- ASTM grades carriage bolts based on factors like strength, high-pressure & high-temperature application.
How to install a carriage bolt?
- Drill a hole of the appropriate bolt size (diameter) into the surface for sliding the bolt.
- Place the washer & nut on the back side of the bolt (opposite side of the head).
- Tighten the nut to pull the bolt's square shoulder into the surface.
- When the underside of the bolt head rests against the surface, the carriage bolt is completely installed.
How to remove a carriage bolt?
- Twist the nut loose to the end of the bolt. Do not take the nut out of the bolt as it is required to move the bolt.
- Hit the nut using a hammer to move the bolt's square shoulder out of the surface. After some time, the nut would get closer to the surface.
- Repeat the process till the nut no longer grips the bolt or when the bolt can be removed by hand.
- Users can pry the bolt out of the hole using the nail remover attached to a hammer, if the bolt gets stuck in the hole.
Do carriage bolts need washers?
It is highly recommended to use washers with carriage bolts. Using a washer under the screw head increases the surface area and distributes the load. This decreases damage when pulling the bolt through the material using the nut and prevents the bolt from sticking / digging into the surface.
What are some standards that carriage bolts abide by?
Carriage bolts may adhere to international standards like ASME (American Society of Mechanical Engineers), ASTM (American Society for Testing and Materials), ISO (International Organization for Standardization), SAE International (Society of Automotive Engineers) & DIN (German Institute for Standardization) for meeting performance, safety, dimensional & material requirements.
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