Auto-Lok 12-Point Locking Nuts — ALN12P
Compact, high-torque 12-point (double-hex) all-metal lock nuts for demanding assemblies. Alloy-steel, heat-treated; cadmium plated per QQ-P-416. Typical tensile strength: 180,000 PSI.
- Why 12-point? Smaller wrench swing and better access than hex in tight spaces; higher tool engagement reduces rounding risk.
- Material & finish: Heat-treated alloy steel, cadmium plated (QQ-P-416) for corrosion protection and consistent torque.
- Strength: Designed around ~180 ksi tensile class for high axial loads.
- Use cases: Aerospace, motorsport, and power-dense machinery where compact geometry and repeatable clamp load matter.
| Part number | Thread | Amax (in) | Axial strength (lbf) | Weight (g) |
|---|---|---|---|---|
| ALN12PD1032D | 10-32 | 0.190 | 4,035 | 0.95 |
| ALN12PD428D | 1/4-28 | 0.250 | 7,200 | 1.91 |
| ALN12PD524D | 5/16-24 | 0.285 | 11,400 | 3.22 |
| ALN12PD624D | 3/8-24 | 0.375 | 17,000 | 5.72 |
| ALN12PD720D | 7/16-20 | 0.438 | 23,000 | 9.62 |
| ALN12PD820D | 1/2-20 | 0.500 | 30,700 | 13.65 |
| ALN12PD918D | 9/16-18 | 0.562 | 38,900 | 18.69 |
| ALN12PD1018D | 5/8-18 | 0.625 | 48,700 | 24.31 |
| ALN12PD1216D | 3/4-16 | 0.750 | 70,800 | 43.86 |
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Full dimensions, torque data, and material specs are in the catalogue. Download catalogue