5305-00-638-9502, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-638-9502

Federal Supply Class:
5305

National Item Identification Number:
006389502

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:

0410-128

56232

LOCKHEED MARTIN CORPORATION

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM
COUNTERSINK ANGLE	80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.312 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM
HEAD DIAMETER	0.200 INCHES MINIMUM AND 0.225 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.112 INCHES
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD LENGTH	0.181 INCHES MINIMUM AND 0.208 INCHES MAXIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	40
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)

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