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Product Specifications:
| Item | Spiral Flute Tap |
| 55% Thread Drill Size | 5.7 mm |
| 65% Thread Drill Size | 7/32" |
| 75% Thread Drill Size | 5.45 |
| Coolant Fed | Non Coolant Through |
| Drill Bit Size | 0.2129", 0.2152", 0.2175", 0.2198", 0.2222" |
| Extended Neck | Yes |
| Features | High Performance Spiral Flute Tap For Stainless Steel |
| Finish | Black Oxide |
| Helix Angle | 45° |
| List Number | 303 |
| Material Grade - Machining | Grade 303, Vanadium High Speed Steel |
| Measurement System | Fractional Inch |
| Number Of Flutes | 3 |
| Overall Length | 2 1/2" |
| Pitch Diameter Limits | H7 |
| Primary Material Application | Stainless Steel, Steel |
| Primary Material Application Iso Code | M, P1 |
| Shank Dia. | 1/4" |
| Shank Length | 1 1/2" |
| Shank Type - Machining | Straight |
| Square Size | 0.191" |
| Tap Chamfer | Modified Bottoming |
| Tap Finish | Black Oxide |
| Tap Material | Powdered Metal |
| Tap Shank Standard | ANSI |
| Tap Style | Spiral Flute |
| Tap Thread Size | 1/4"-28 |
| Tap Type | Modified Bottom |
| Thread Direction | Right Hand |
| Thread Length | 3/8" |
| Thread Limit | H7 |
| Thread Limit/class Of Fit | H7 |
| Thread Size | 1/4"-28 |
| Thread Standard | Unf |
| Thread Type | Fine |
| Threads Per Inch | 28 |
Shipping Info:
| Ship weight (kg) | 0.01 |
| Ship height (cm) | 1.27 |
| Ship length (cm) | 7.62 |
| Ship width (cm) | 1.27 |
| HS code | 8207400000 |
Product Variants
| Product | Model | Number Of Flutes | Thread Length | Overall Length | Thread Size | Tap Finish | Thread Limit | 75% Thread Drill Size | Shank Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
1430105 | 3 | 5/8" | 2 1/2" | 1/4"-20 | Tin | H3 | #7 | 1/4" | €39.71 | |
![]() |
1645514207 | 3 | 16 mm | 110 mm | M14 x 2 | Tin | D7 | 12 mm | 10.89 mm | €224.64 | |
![]() |
1645516205 | 3 | 16 mm | 110 mm | M16 x 2 | Tin | D5 | 14 mm | 12.19 mm | €249.37 | |
![]() |
1645516207 | 3 | 16 mm | 110 mm | M16 x 2 | Tin | D7 | 14 mm | 12.19 mm | €249.37 | |
![]() |
1645518257 | 4 | 25 mm | 125 mm | M18 x 2.5 | Tin | D7 | 16.5 | 13.76 mm | €345.18 | |
![]() |
0142008 | 2 | 3/16" | 2" | #6-32 | TiCN | H4 | #36 | 9/64" | €59.46 | |
![]() |
0142108 | 2 | 3/4" | 2 1/8" | - | - | - | - | 0.168" | €59.46 |
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Contact us
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OSG 1763801 Spiral Flute Tap Modified Bottoming 1/4 Inch x 28 S/o
€45.87 /unit



