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MS21059L4K

Military Standard Locking Nutplate Self

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Description

Nutplate

Specifications

Alternate Part Number NAS686A4K
Center To Center Distance Between Mounting Holes Along Length Between 0.998 inches and 1.002 inches
Counterbore Diameter 0.310 inches and 0.330 inches
Distance From Aperture Center To Mounting Hole Center Between 0.495 inches and 0.505 inches
Features Provided Floating nut
Hardness Rating 49.0 rockwell
Locking Feature Prevailing torque all metal design
Lubrication Dry film lubricant
Material Steel
Mounting Hole Arrangement Style 2 holes
Mounting Hole Countersink Angle Between 98.0 degrees and 102.0 degrees
Mounting Hole Diameter Between 0.098 inches and 0.103 inches
Mounting Provision Location Opposite nut projection side
NIIN 00-777-5794
NSN 5310-00-777-5794
Nut Counterbore Depth 0.032 inches nut
Nut Height 0.281
Nut Length 1.292
Nut Mounting Provision Countersunk holes
Nut Style Plate
Plate Thickness 0.032
Plate Width Between 0.350 inches and 0.516 inches
Surface Treatment Cadmium
Surface Treatment Specification Type 2 federal specification single treatment response qq-p-416
Temperature Rating 450.0 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
Weight .008 lb

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