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12 Point Machine Bolt MS9557-13

Description:

Length: 15/16", thread: 1/4-28, 12 point machine bolt, extended washer head, corrosion and heat resistant steel

MS9557-13 Details

National Stock Number (NSN) 5306-00-079-1299
Alternate Part Number N/A
Federal Supply Class (FSC) 5306
Unit of Measure (UOM) 10 /Ea.
Thread Class 2a
Thread Direction Right-hand
Thread Length Between 0.750 inches and 0.810 inches
Fastener Length 0.938 inches
Head Style Double hexagon extended washer
Head Height 0.300 inches
Width Between Flats Between 0.305 inches and 0.313 inches
Extended Washer Diameter 0.438 inches
Extended Washer Thickness Between 0.060 inches and 0.070 inches
Thread Diameter 0.250 inches
Grip Length Between 0.128 inches and 0.188 inches
Features Provided Finished head
Thready Qty Per Inch (tpi) C8
Minimum Yield Strength 85000 pounds per square inch
Surface Finish 32.0 microinches bearing surface of head
Surface Finish 32.0 microinches grip
Surface Finish 32.0 microinches threads
Material Iron alloy 660
Material Specification Ams 5731 assn standard single material response
Thread Series Designator Unjf

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