Last Modified: Jan 24, 2021

Part Number BACB30LR3-7 Machine Screw

Definition:	Machine Screw, also referenced with federal logistics item name code 6657: 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.
Federal Supply Class (FSC):	5305
NIIN:	00-001-9781 (000019781)
NMF Description:	BOLTS,NUTS OR SCREWS, NOI (SUB 3)