5305-01-352-3296, SCREW,EXTERNALLY RELIEVED BODY

5305-01-352-3297 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-352-3296

Federal Supply Class:
5305

National Item Identification Number:
013523296

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:

63A141974P9	16331	LOCKHEED MARTIN CORPORATION
66666-2508	06540	NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV
66666-2508	1YGB8	CAREY MANUFACTURING CO, INC
66666-25089	06540	NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.875 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	2.610 INCHES MINIMUM AND 2.640 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
HEAD DIAMETER	0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM
HEAD HEIGHT	0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM
HEAD STYLE	KNURLED NO. 1
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	ASTMA555 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMA581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTMA380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNC
THREAD QUANTITY PER INCH	20

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