5305-01-189-6504, SCREW,EXTERNALLY RELIEVED BODY

2805-01-189-6503 BAFFLE,AIRFLOW,NONAIRCRAFT RECIP

National Stock Number:
5305-01-189-6504

Federal Supply Class:
5305

National Item Identification Number:
011896504

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:

5595242-1	31442	NORTHROP GRUMMAN SYSTEMS CORPORATION
5595242-1	53711	NAVAL SEA SYSTEMS COMMAND

Techincal Specification:

THREAD SERIES DESIGNATOR	UNC
NOMINAL THREAD DIAMETER	0.164 INCHES
THREAD QUANTITY PER INCH	32
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.315 INCHES MINIMUM AND
	0.325 INCHES MAXIMUM
FASTENER LENGTH	1.585 INCHES MINIMUM AND
	1.595 INCHES MAXIMUM
MATERIAL	STEEL COMP 302 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE	FLAT CHAMFER
HEAD DIAMETER	0.256 INCHES MINIMUM AND
	0.270 INCHES MAXIMUM
HEAD HEIGHT	0.305 INCHES MINIMUM AND
	0.315 INCHES MAXIMUM
INTERNAL DRIVE STYLE	SLOT
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	4
FIRST DIAMETER FROM HEAD	0.109 INCHES MINIMUM AND
	0.119 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD	0.164 INCHES NOMINAL
THIRD DIAMETER FROM HEAD	0.109 INCHES MINIMUM AND
	0.119 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.118 INCHES MINIMUM AND
	0.122 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.055 INCHES MINIMUM AND
	0.065 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.375 INCHES MINIMUM AND
	0.385 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.115 INCHES MINIMUM AND
	1.125 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	1.450 INCHES MINIMUM AND
	1.505 INCHES MAXIMUM
SPECIAL FEATURES	HEAD DIMENSIONS AFTER KNURLING

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