5305-01-239-9395, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-239-9395

Federal Supply Class:
5305

National Item Identification Number:
012399395

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:

732-.875-AL3	51506	ACCURATE SCREW MACHINE CORP
85-33101	30554	DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
HEAD HEIGHT	0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM
HEAD DIAMETER	0.557 INCHES MINIMUM AND 0.577 INCHES MAXIMUM
HEAD STYLE	KNURLED NO. 1
INTERNAL DRIVE STYLE	SLOT
MATERIAL	ALUMINUM OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
POINT STYLE	CONE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-L-5541 CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CHROMATE OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD CLASS	2A
THREAD LENGTH	0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNC
THREAD QUANTITY PER INCH	20

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