5305-01-439-6845, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-439-6845

Federal Supply Class:
5305

National Item Identification Number:
014396845

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:

A3167793-8	31550	L3HARRIS TECHNOLOGIES, INC.
A3167793-8	80063	US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR

Techincal Specification:

THREAD SERIES DESIGNATOR	M
NOMINAL THREAD DIAMETER	4.0 MILLIMETERS
THREAD PITCH IN MILLIMETERS	0.7
EXTERNAL THREAD TOLERANCE CLASS	6G
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	4.75 MILLIMETERS MINIMUM AND
	5.25 MILLIMETERS MAXIMUM
FASTENER LENGTH	20.75 MILLIMETERS MINIMUM AND
	21.25 MILLIMETERS MAXIMUM
MATERIAL	STEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 CRES 300 SERIES MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE	PAN NO. 2
HEAD DIAMETER	6.75 MILLIMETERS MINIMUM AND
	7.25 MILLIMETERS MAXIMUM
HEAD HEIGHT	3.25 MILLIMETERS MINIMUM AND
	3.75 MILLIMETERS MAXIMUM
INTERNAL DRIVE STYLE	CROSS RECESS TYPE II
LOCKING FEATURE	PATCH THREADS
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FIRST DIAMETER FROM HEAD	2.94 MILLIMETERS MINIMUM AND
	3.06 MILLIMETERS MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	16.0 MILLIMETERS NOMINAL
SPECIAL FEATURES	NYLON LOCKING ELEMENT 6/6 I/A/W L-P-410 TO THREADS

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