5305-99-724-7904, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-99-724-7904

Federal Supply Class:
5305

National Item Identification Number:
997247904

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:

MBEU185208

U1604

MARTIN-BAKER AIRCRAFT COMPANY LIMITED

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.170 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.218 INCHES MINIMUM AND 0.220 INCHES MAXIMUM
HEAD DIAMETER	0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
HEAD HEIGHT	0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM
HEAD STYLE	PAN NO. 2
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	BS S143D NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
III PART NAME ASSIGNED BY CONTROLLING AGENCY	BOLT SPECIAL
NOMINAL THREAD DIAMETER	0.190 INCHES
SECOND DIAMETER FROM HEAD	0.141 INCHES MINIMUM AND 0.145 INCHES MAXIMUM
THREAD LENGTH	0.189 INCHES NOMINAL
THREAD CLASS	21
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNF

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