Spec hardware, served at warp speed.

nuts › self-locking nutplates

MS21080-4

Military Standard Locking Nutplate Self

View quote list → Saved parts →

Description

Nutplate

Specifications

Center To Center Distance Between Mounting Holes Along Length Between 0.310 inches and 0.314 inches
Countersink Angle 88.0 degrees nut and 102.0 degrees nut
Distance From Aperture Center To Mounting Hole Center Between 0.339 inches and 0.349 inches
Hardness Rating 32.0 rockwell c
Industry Standards/Certification MS21080
Insert Material Nylon
Locking Feature Prevailing torque with nonmetallic insert
Material Plastic
Maximum Dimension A 1.062 in
Maximum Dimension B 0.516 in
Maximum Dimension C 0.344 in
Maximum Dimension J 0.312 in
Maximum Height 0.375 in
Mounting Hole Arrangement Style 2 holes
Mounting Hole Diameter Between 0.098 inches and 0.103 inches
NIIN 00-728-6368
NSN 5310-00-728-6368
Nut Height Between 0.240 inches and 0.375 inches
Nut Length 1.062
Nut Mounting Provision Straight holes
Nut Style Plate
Plate Thickness 0.075
Plate Width Between 0.438 inches and 0.516 inches
Surface Treatment Cadmium except insert and chromate except insert
Surface Treatment Specification Cl 3 federal specification single treatment response except insert type 2 qq-p-416
Temperature Rating 250.0 degrees fahrenheit
Thread Class 3b
Thread Direction Right-hand
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series Unjf (fine thread with external controlled root radius)
Thread Size 0.250, 1/4-28
Weight 0.011 lb

Other sizes

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

Cross-reference

Similar parts

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

Looking for a specific part? Use the cross-reference lookup.

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