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Flush Reduced Head Bolt NAS1581C4T12

Description:

NAS1581C4T12 Details

National Stock Number (NSN) 5305-01-603-8744
Alternate Part Number N/A
Federal Supply Class (FSC) 5305
Unit of Measure (UOM) 5 /Ea.
Thread Class 3a
Thread Direction Right-hand
Thread Length 0.403 inches
Fastener Length Between 1.138 inches and 1.168 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 0.74 inches and 0.76 inches
Thready Qty Per Inch (tpi) 28
Min. Tensile Strength (psi) 3700 pounds per square inch
Countersink Angle Between 99.0 degrees and 101.0 degrees
Part Name Assigned By Controlling Agency Bolt, shear, 100 degrees flush reduced head, offset cruciform, offset cruciform-ribbed & dt slot, 95 ksi fsu
Material Stainless steel
Material Specification Cres 286 conform to ams5731, ams5732, ams5737 or ams5853 national std/spec single material response
Surface Treatment Passivate
Surface Treatment Specification Passivate iaw ams2700 method 1, type 2 or 8, class 1 national std/spec single treatment response
Thread Series Designator Unjf

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