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Flush Reduced Head Bolt NAS1581F4T9

Description:

Length: 0.965", thread: 1/4-28, shear 100° , flush reduced head bolt, alloy steel, offset cruciform

NAS1581F4T9 Details

National Stock Number (NSN) 5305-01-438-2265
Alternate Part Number N/A
Federal Supply Class (FSC) 5305
Unit of Measure (UOM) 10 /Ea.
Thread Class 3a
Thread Direction Right-hand
Thread Length 0.403 inches
Fastener Length Between 0.951 inches and 0.981 inches
Head Style Flat countersunk
Head Diameter Between 0.3504 inches and 0.3988 inches
Grip Diameter Between 0.2485 inches and 0.2495 inches
Internal Drive Style Offset cruciform (torque set)
Thread Diameter 0.250 inches
Grip Length Between 0.553 inches and 0.573 inches
Thready Qty Per Inch (tpi) 28
Min. Tensile Strength (psi) 160000 pounds per square inch
Countersink Angle Between 99.0 degrees and 101.0 degrees
Material Steel comp 4140 or steel comp 4340 or steel comp 8740
Material Specification Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-6040 military specification 3rd material response
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416, type 2, class 2 federal specification all treatment responses
Thread Series Designator Unjf
Specification Data 80205-nas1581 professional/industrial association standard

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