Serving our customers with quality and safety first.
3a
RIGHT-Hand
0.640in. ⁓41/64"
1.268in. ⁓1-9/32"
hexagon
0.188in. ⁓13/64"
0.428in.
0.838in. first shoulder
0.628in. first shoulder
0.250in. ⁓1/4"
casehardened
20
round first shoulder
QQ-S-634 fed spec all material responses
cadmium and chromate
QQ-P-416, ty 2, cl 3 fed spec all treatment responses
unc
Unc
20
Hexagon
0.640 inches minimum
Right-hand
3a
FSC 5306 ⁓ Bolts
unc thread series cadmium surface treated 20 thread quantity per inch hexagon head style 0.640" thread length right-hand 3a thread class
Nothing similar to this part number was found in our inventory
An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. it has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. the head is not designed to be held or driven with an inserted drivers. a locking feature may be incorporated in the design of the head or threads. for items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. for items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. excludes thumbscrew.