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MS21043-6

Name: MS21043-6
Brand: MS
SKU: MS21043-6

Military Standard Locking Extended Washer Nut Self

Description

Nut

Counterbore Diameter	0.375 inches nut and 0.405 inches nut
Features	Heat Resistant
Finish	Silver Plate
Industry Standards/Certification	MS21043
Locking Feature	Prevailing torque all metal design
Lubrication	Soluble lubricant
Material	CRES
Material Specification	Ams 5525 assn standard single material response or ams 5731 assn standard single material response or ams 5732 assn standard single material response
Maximum Diameter A	0.620 in
Maximum Dimension H	0.282 in
Maximum Dimension W	0.440 in
Minimum Dimension C	0.491 in
Minimum Dimension H	0.267 in
Minimum Dimension W	0.430 in
NIIN	00-881-0943
NSN	5310-00-881-0943
Nut Counterbore Depth	0.008 inches nut and 0.042 inches nut
Nut Style	Hexagon
Overall Height	Between 0.267 inches and 0.282 inches
Precious Material	Silver
Precious Material And Location	External surface silver
Service Temperature	800 ºF
Shape	Reduced Hexagon
Surface Treatment	Silver
Surface Treatment Specification	Qq-s-365 federal specification single treatment response or ams 2410 assn standard single treatment response
Temperature Rating	800.0 degrees fahrenheit
Thread	3/8-24
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	0.375, 3/8-24
Type	Self-Locking Nut
Washer Outside Diameter	0.620
Washer Thickness	0.030
Weight	.005 lb
Width Across Flats	Between 0.430 inches and 0.440 inches

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

No interchangeable or dimensionally similar parts are on record for MS21043-6. Try the cross-reference lookup to search by a different part number.

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