5305-00-051-2741, SCREW,EXTERNALLY RELIEVED BODY

6640-00-051-2737 CLAMP,TUBING,REGULATING-SHUTOFF

National Stock Number:
5305-00-051-2741

Federal Supply Class:
5305

National Item Identification Number:
000512741

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:

0N108105	98230	NATIONAL SECURITY AGENCY
0N124459	98230	NATIONAL SECURITY AGENCY

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM
HEAD HEIGHT	0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM
HEAD DIAMETER	0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.164 INCHES
SPECIAL FEATURES	COLOR BLACK FED STD 595 NO. 27038 AND CONE POINT
SURFACE TREATMENT	PASSIVATE AND PAINT OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.190 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)

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