5305-00-398-0357, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-398-0357

Federal Supply Class:
5305

National Item Identification Number:
003980357

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:

514R003H02

18323

NORTHROP GRUMMAN SYSTEMS CORPORATION

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.645 INCHES MINIMUM AND 0.655 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.685 INCHES MINIMUM AND 0.695 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.110 INCHES MINIMUM AND 0.150 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	4
FASTENER LENGTH	1.390 INCHES MINIMUM AND 1.450 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.248 INCHES MINIMUM AND 0.252 INCHES MAXIMUM
HEAD HEIGHT	0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM
HEAD STYLE	HEXAGON
INTERNAL DRIVE STYLE	SLOT
MATERIAL	STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.189 INCHES MINIMUM AND 0.199 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THIRD DIAMETER FROM HEAD	0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM
THREAD LENGTH	0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNF

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