All-metal self-locking reduced-hex nut, steel, rated to 450F.
A small reduced hexagon, reduced height, all-metal prevailing torque locknut with a ring base, made of alloy steel and rated to 450F. The L version is cadmium plated (QQ-P-416) with dry film lubricant.
| Where it's used | Lightweight locking nuts for small screws and bolts on airframe and equipment, including flight safety critical uses. |
| Spec status | NASM21042 (supersedes MS21042). |
A sample of what we've quoted and shipped under this spec. If your dash number isn't here, send it anyway. Every order ships with a Certificate of Conformance and lot records.
Need MS21042 parts quoted?Send the part numbers and quantities. We usually quote within two business days.
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