5305-01-278-1961, SCREW,EXTERNALLY RELIEVED BODY

5306-01-278-1960 BOLT,MACHINE

5305-01-278-1962 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-278-1961

Federal Supply Class:
5305

National Item Identification Number:
012781961

Description:
SCREW,EXTERNALLY RELIEVED BODY

Detail:
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.

Manufacturer Information:

A3013574-3

80063

US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR

Techincal Specification:

COLOR	OLIVE DRAB OVERALL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	6.78 MILLIMETERS MINIMUM AND 7.22 MILLIMETERS MAXIMUM
EXTERNAL THREAD TOLERANCE CLASS	6G
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	11.8 MILLIMETERS MINIMUM AND 12.1 MILLIMETERS MAXIMUM
FIRST DIAMETER FROM HEAD	2.10 MILLIMETERS MINIMUM AND 2.18 MILLIMETERS MAXIMUM
HARDNESS RATING	35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	5.5 MILLIMETERS MINIMUM AND 5.8 MILLIMETERS MAXIMUM
HEAD HEIGHT	1.65 MILLIMETERS MINIMUM AND 1.90 MILLIMETERS MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582 COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 416 OVERALL
NOMINAL THREAD DIAMETER	3.0 MILLIMETERS
POINT STYLE	FLAT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	4.9 MILLIMETERS MINIMUM AND 5.1 MILLIMETERS MAXIMUM
THREAD PITCH IN MILLIMETERS	0.5
THREAD SERIES DESIGNATOR	M

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