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MS21055-4

Military Standard Locking Plate Nut Self

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Description

1/4-28 thread - self-locking corner nutplate - low height - cadmium plated carbon steel - 450°,, without dry film lube - plain rivet holes

Specifications

Counterbore Diameter 0.254 inches minimum nut
Distance From Aperture Center To Mounting Hole Center 0.495 inches minimum and 0.505 inches maximum
Hardness Rating 49.0 rockwell c maximum
Locking Feature Prevailing torque all metal design
Lubrication Soluble lubricant
Material Steel
Mounting Hole Arrangement Style 2 holes
Mounting Hole Diameter 0.098 inches minimum and 0.103 inches maximum
NIIN 00-779-3514
NSN 5310-00-779-3514
Nut Counterbore Depth 0.062 inches minimum nut
Nut Height 0.281 inches maximum
Nut Length 0.852 inches maximum
Nut Mounting Provision Straight holes
Nut Style Plate
Plate Thickness 0.055 inches maximum
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416,ty 2,cl 2 fed spec all treatment responses
Temperature Rating 450.0 deg fahrenheit maximum
Thread Class 3b
Thread Direction Right-hand
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series UNJF
Thread Size 0.250
Weight 0.006 lb

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