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Product Specifications:
| Item | Lock Nut |
| Finish | Cadmium Plated |
| Grade | Grade 2 |
| Hex Height | 1/8" |
| Hex Type | Thin Light Hex |
| Hex Width | 3/4" |
| Lock Type | Flexible Top |
| Material | Steel |
| Material Grade/class | Grade 2 |
| Max. Temp. | 1200°F |
| Min. Temp. | -70°F |
| Nut Height | 0.328" |
| 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 | 2B |
| Thread Size | 1/2"-13 |
| Type | Top Lock Jam |
Shipping Info:
| Ship weight (kg) | 0.9 |
| Ship height (cm) | 2.86 |
| Ship length (cm) | 4.45 |
| Ship width (cm) | 4.45 |
| Country of Origin | US |
Product Variants
| Product | Model | Hex Width | Nut Height | Hex Height | Thread Fit | Thread Direction | Material Grade/class | Lock Type | Hex Type | Pkg. Qty. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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21FK-1024 | 3/8" | 3/16" | 1/16" | 3B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 200 | €207.47 | |
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21FK-1032 | 3/8" | 3/16" | 1/16" | 3B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 200 | €142.65 | |
![]() |
21FK-420 | 7/16" | 7/32" | 5/64" | 2B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 150 | €123.61 | |
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21FK-524 | 1/2" | 17/64" | 3/32" | 3B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 150 | €188.62 | |
![]() |
21FK-624 | 9/16" | 0.282" | 7/64" | 3B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 150 | €180.17 | |
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21FK-632 | 5/16" | 0.141" | - | - | Right Hand | - | - | - | 200 | €188.60 | |
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21FK-820 | 3/4" | 0.328" | 1/8" | 3B | Right Hand | Grade 2 | Flexible Top | Thin Light Hex | 75 | €214.32 |
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Contact us
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FLEXLOC 21FKF-813 Locknut, 1/2 In - 13 Thread Size, Flexible Top, 3/4 In Hex Wd., Top Lock Jam, Gr. 2, Steel
€503.84 /pack







