5305-01-191-3097, SCREW,EXTERNALLY RELIEVED BODY

5305-01-191-3096 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-191-3097

Federal Supply Class:
5305

National Item Identification Number:
011913097

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:

MD31623-39	K0349	M L AVIATION LTD INCORPORATING M L WALLOP DEFENCE SYSTEMS LTD
MD31623-39	K4234	CURTISS-WRIGHT FLOW CONTROL (UK) LTD
MD31623-39	U1918	MISSION SYSTEMS WIMBORNE LIMITED

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.127 INCHES MINIMUM AND 0.138 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.330 INCHES MINIMUM AND 0.340 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.364 INCHES MINIMUM AND 0.365 INCHES MAXIMUM
HEAD HEIGHT	0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM
HEAD DIAMETER	0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
HEAD STYLE	PAN NO. 2
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	S.154 FSCM K0349 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.198 INCHES MINIMUM AND 0.205 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	03-19 FSCM K0349 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
THREAD LENGTH	0.197 INCHES MINIMUM AND 0.208 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNJF

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