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MS21083D5

Military Standard Locking Hexagon Nut Self

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Description

Nut

Specifications

Alternate Part Number NAS1022D5
Bearing Surface Finish 125.0 microinches
Bearing Surface Type Chamfered or washer faced
Countersink Angle 88.0 degrees nut
Locking Feature Prevailing torque with nonmetallic insert
Lubrication Soluble lubricant
Material Aluminum
Material Specification T6 federal specification 4th material response nut t6 federal specification 3rd material response nut or qq-a-200/11 t4 federal specification 2nd material response nut or qq-a-225/6 t6 federal specification 1st material response nut or qq-a-225/4 qq-a-200/2
NIIN 00-016-7181
NSN 5310-00-016-7181
Nut Height 0.266
Nut Style Hexagon
Surface Treatment Anodize except insert or chromate except insert
Surface Treatment Specification Mil-a-8625 military specification 1st treatment response except insert or mil-c-5541 military specification 2nd treatment response except insert
Temperature Rating 250.0 degrees fahrenheit
Thread Class 3b
Thread Direction Right-hand
Thread Qty 24
Thread Qty Per Inch (tpi) 24
Thread Series Unjf (fine thread with external controlled root radius)
Thread Size 0.312
Weight 0.003 lb
Width Across Flats Between 0.492 inches and 0.502 inches

Other sizes

Parts that share this base number, ordered by size. Always verify the full specification before substituting.

Cross-reference

Interchangeable

Parts that share a National Stock Number or are listed as an alternate for MS21083D5 — functionally equivalent.

Similar parts

Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.

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Catalog data updated 2026-07-05. Report a data error