5305-00-878-9752, SCREW,EXTERNALLY RELIEVED BODY

5305-00-878-9754 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-878-9752

Federal Supply Class:
5305

National Item Identification Number:
008789752

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:

SMB537198

80063

US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.265 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.093 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.562 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.220 INCHES NOMINAL
HEAD DIAMETER	0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM
HEAD HEIGHT	0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM
HEAD STYLE	WATERTIGHT
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-B-626,1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	COPPER ALLOY 360 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.206 INCHES NOMINAL
SPECIAL FEATURES	CONE POINT 90 DEG OF ANGLE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-N-290 TY 5 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	NICKEL OVERALL
THREAD LENGTH	0.172 INCHES MINIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	28

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