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Product Specifications:
| Item | Lock Nut |
| Finish | Cadmium Plated |
| Grade | Grade 2 |
| Hex Height | 7/32" |
| Hex Type | Thin Light Hex |
| Hex Width | 1 7/16" |
| Lock Type | Flexible Top |
| Material | Steel |
| Material Grade/class | Grade 2 |
| Max. Temp. | 1200°F |
| Min. Temp. | -70°F |
| Nut Height | 0.571" |
| Nut Type | Top Lock Jam Nut |
| Nut Type | Flexible Top |
| Removable | Yes |
| Resistance Properties | Impact Resistant, Shock And Vibration Resistant |
| System Of Measurement | Imperial |
| Thread Direction | Right Hand |
| Thread Fit | 3B |
| Thread Size | 1"-14 |
| Type | Top Lock Jam |
Shipping Info:
| Ship weight (kg) | 1.35 |
| Ship height (cm) | 0.53 |
| Ship length (cm) | 3.05 |
| Ship width (cm) | 3.63 |
| Country of Origin | US |
Product Variants
| Product | Model | Thread Size | Hex Width | Hex Height | Nut Height | Hex Type | Max. Temp. | Resistance Properties | Pkg. Qty. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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21FK-1024 | #10-24 | 3/8" | 1/16" | 3/16" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 200 | €160.51 | |
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21FK-1032 | #10-32 | 3/8" | 1/16" | 3/16" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 200 | €111.89 | |
![]() |
21FK-420 | 1/4"-20 | 7/16" | 5/64" | 7/32" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 150 | €98.99 | |
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21FK-524 | 5/16"-24 | 1/2" | 3/32" | 17/64" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 150 | €138.62 | |
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21FK-624 | 3/8"-24 | 9/16" | 7/64" | 0.282" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 150 | €151.62 | |
![]() |
21FK-632 | #6-32 | 5/16" | - | 0.141" | - | - | - | 200 | €147.98 | |
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21FK-820 | 1/2"-20 | 3/4" | 1/8" | 0.328" | Thin Light Hex | 1200°F | Impact Resistant, Shock And Vibration Resistant | 75 | €175.44 |
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FLEXLOC 31FK-1614 Locknut, 1 In - 14 Thread Size, Flexible Top, 1 7/16 In Hex Wd., Top Lock Jam, Gr. 2, Steel
€231.90 /pack







