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Product Specifications:
| Item | Lock Nut |
| Finish | Cadmium Plated |
| Grade | Grade 2 |
| Hex Height | 21/64" |
| Hex Type | Standard Heavy Hex |
| Hex Width | 1 1/8" |
| Lock Type | Flexible Top |
| Material | Steel |
| Material Grade/class | Grade 2 |
| Maximum Temperature | 1200°F |
| Minimum Temperature | -70°F |
| Nut Height | 0.759" |
| Nut Type | Top Lock |
| Nut Type | Flexible Top |
| Removable | Yes |
| Resistance Properties | Impact Resistant, Shock And Vibration Resistant |
| System Of Measurement | Imperial |
| Thread Direction | Right Hand |
| Thread Fit | 2B |
| Thread Size | 3/4"-10 |
| Type | Top Lock |
Shipping Info:
| Ship weight (kg) | 0.9 |
| Ship height (cm) | 3.37 |
| Ship length (cm) | 2.86 |
| Ship width (cm) | 2.86 |
| Country of Origin | US |
Product Variants
| Product | Model | Thread Size | Hex Width | Hex Height | Nut Height | Hex Type | Resistance Properties | Nut Type | Type | Pkg. Qty. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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21FA-518 | 5/16"-18 | 9/16" | 7/64" | 0.321" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 50 | €140.09 | |
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21FA-616 | 3/8"-16 | 5/8" | 9/64" | 0.384" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 100 | €373.03 | |
![]() |
21FA-813 | 1/2"-13 | 13/16" | 13/64" | 0.509" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 25 | €195.82 | |
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21FAC-420 | 1/4"-20 | 1/2" | 3/32" | 0.29" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 100 | €301.05 | |
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31FA-1011 | 5/8"-11 | 1" | 1/4" | 0.634" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 15 | €202.66 | |
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31FA-1409 | 7/8"-9 | 1 5/16" | 25/64" | 0.884" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 5 | €176.12 | |
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31FA-1608 | 1"-8 | 1 1/2" | 15/32" | 1.009" | Standard Heavy Hex | Impact Resistant, Shock And Vibration Resistant | Flexible Top | Top Lock | 5 | €253.25 |
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FLEXLOC 31FA-1210 Locknut, 3/4 In - 10 Thread Size, Flexible Top, 1 1/8 In Hex Wd., Top Lock, Gr. 2, Steel
€213.35 /pack







