Item is slotted in the middle of each flat as well as on each point. 12 total slots. Material is quenched and tempered grade 5 steel.
No other part numbers with same form, fit, and function found.
A nut having a flat bearing surface and 6 flat sides with slots in its upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes nut (1), plain, castellated, hexagon.
Classification: Nuts of iron or steel
NSN 5990-00-682-3531
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