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MS9566-16

Military Standard Bolt

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Description

Fastener Length: 1-1/8", Hole Diameter: 1/16", Thread: 1/4-28, Thread Length: 51/64"

Specifications

Extended Washer Diameter 0.438
Extended Washer Thickness 0.060 inches minimum and 0.070 inches maximum
Fastener Length 1.125
Features Provided Finished head
Grip Length 0.315 inches minimum and 0.375 inches maximum
Hardness Rating 248.0 brinell standard minimum and 341.0 brinell standard maximum
Head Height 0.300
Head Style Double hexagon w/hole
Hole Configuration Style Double hexagon longitudinal hole
Hole Diameter 0.070
Hole Quantity 4
Hole Type Drilled
Length 1 1/8
Material Iron
Material Specification Ams 5731 assn std single material response
Min. Tensile Strength (psi) 130000 pounds per square inch
Minimum Yield Strength 85000 pounds per square inch
Surface Finish 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 0.750 inches minimum and 0.810 inches maximum
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series Designator UNJF
Thread Size 1/4
Width Between Flats 0.305 inches minimum and 0.313 inches maximum

Cross-reference

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