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MS21250H05038

Military Standard Shear Bolt

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Description

Fastener Length: 2-63/64", Hole Diameter: 3/64", Thread: 1/4-24, Thread Length: 39/64", MS21250 series bolt

Specifications

Extended Washer Diameter Between 0.521 inches and 0.531 inches
Extended Washer Thickness Between 0.072 inches and 0.092 inches
Fastener Length Between 2.964 inches and 2.984 inches
Grip Diameter Between 0.311 inches and 0.312 inches
Grip Length Between 2.365 inches and 2.385 inches
Hardness Rating 39.0 rockwell c and 43.0 rockwell c
Head Height Between 0.338 inches and 0.358 inches
Head Style Double hexagon w/hole
Hole Configuration Style Double hexagon longitudinal hole
Hole Diameter Between 0.050 inches and 0.060 inches
Hole Quantity 4
Hole Type Drilled
Material Steel
Material Specification Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-6049 military specification 3rd material response
Min. Tensile Strength (psi) 180000 pounds per square inch
Surface Finish 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads
Surface Treatment Cadmium and chromate
Surface Treatment Specification Type 2 class 2 federal specification single treatment response qq-p-416
Thread Class 3a
Thread Diameter 0.312
Thread Direction Right-hand
Thread Length Between 0.579 inches and 0.619 inches
Thread Qty 24
Thread Qty Per Inch (tpi) 24
Thread Series UNJF
Thread Series Designator Unjf (fine thread with external controlled root radius)
Thread Size 1/4
Width Between Flats Between 0.365 inches and 0.385 inches

Cross-reference

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