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3a
RIGHT-Hand
0.308in. and 0.388in. ⁓25/64"
0.408in. and 0.438in. ⁓29/64"
flat countersunk
0.193in. and 0.226in.
100.0 degrees
TRI-Wing recess drive
Flat countersunk
0.308 inches minimum and 0.388 inches maximum
Right-hand
3a
FSC 5305 ⁓ Screws
tri-wing recess drive flat countersunk head style 0.308" 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.