Serving our customers with quality and safety first.
3a
RIGHT-Hand
0.330in. and 0.370in. ⁓3/8"
0.640in. and 0.680in. ⁓11/16"
flat countersunk
0.504in. and 0.514in.
slot
0.312in. ⁓5/16"
18
60.0 degrees
copper alloy 464
sae 70b assn std 1st material response or QQ-B-639 fed spec 2nd material response
unc
Unc
18
Flat countersunk
0.330 inches minimum and 0.370 inches maximum
Right-hand
3a
Schedule B number: 7415338550
nmfc 096630
Other copper screws (not for wood) bolts and nuts
FSC 5305 ⁓ Screws
unc thread series 18 thread quantity per inch flat countersunk head style 0.330" 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 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.