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Flush Reduced Head Bolt NAS1581F4T7

Description:

Length: 0.841", thread: 1/4-28, shear 100° , flush reduced head bolt, alloy steel, offset cruciform

NAS1581F4T7 Details

National Stock Number (NSN) 5305-01-056-1504
Alternate Part Number N/A
Federal Supply Class (FSC) 5305
Unit of Measure (UOM) 50 /Ea.
Thread Class 3a
Thread Direction Right-hand
Thread Length Between 0.378 inches and 0.428 inches
Fastener Length Between 0.826 inches and 0.856 inches
Head Style Flat countersunk
Head Diameter Between 0.350 inches and 0.399 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 0.428 inches and 0.448 inches
Thready Qty Per Inch (tpi) 28
Min. Tensile Strength (psi) 160000 pounds per square inch
Hardness Rating 36.0 rockwell c and 40.0 rockwell c
Countersink Angle 100.0 degrees
Surface Finish 32.0 microinches grip
Surface Finish 32.0 microinches threads
Material Steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416 ty2 cl2 federal specification single treatment response
Thread Series Designator Unjf
Specification Data 80205-nas1581 professional/industrial association standard

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