Serving our customers with quality and safety first.
3a
0.657in. ⁓43/64"
0.969in. ⁓31/32"
hexagon
0.234in. and 0.266in. ⁓17/64"
0.615in. and 0.627in.
0.106in. first hole
0.438in. ⁓29/64"
0.312in.
finished head
20
125000 pounds per square inch
26.0 rockwell c and 32.0 rockwell c
0.796in. first hole
steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140
MIL-B-6812 mil spec all material responses
unf
Unf
Steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140
20
0.312 inches
Hexagon
0.657 inches minimum
3a
Schedule B number: 7318152000
nmfc 093486
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5306 ⁓ Bolts
unf thread series 20 thread quantity per inch 0.312" grip length hexagon head style 0.657" thread length 3a thread class
Nothing similar to this part number was found in our inventory
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. see also screw, cap, hexagon head and screw, machine.