Serving our customers with quality and safety first.
3a
RIGHT-Hand
0.250in. ⁓1/4"
0.501in. ⁓33/64"
crowned hexagon
0.187in. ⁓3/16"
0.375in.
0.156in.
0.178in. and 0.182in.
flat
w/o internal drive
0.250in. ⁓1/4"
20
zzzy
1
nickel alloy
QQ-N-286, cl b, hex bar fed spec single material response
unc
cleaned iaw MIL-I-52211
Unc
Nickel alloy
20
Crowned hexagon
0.250 inches
Right-hand
3a
Schedule B number: 7508900000
nmfc 139820
Other articles of nickel (excluding cloth, grill & netting of nickel wire)
FSC 5305 ⁓ Screws
unc thread series 20 thread quantity per inch crowned hexagon head style 0.250" thread length right-hand 3a thread class
1. | 901-14 | Cage 13669 |
2. | 901-14 | Cage 28968 |
Nothing similar to this part number was found in our inventory
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). it is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and 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. see also bolt, externally relieved body and bolt, internal wrenching.