5305-00-546-8180, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-546-8180

Federal Supply Class:
5305

National Item Identification Number:
005468180

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:

8172568

18876

U S ARMY AVIATION AND MISSILE COMMAND

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.500 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.750 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM
HEAD DIAMETER	0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
HEAD HEIGHT	0.102 INCHES MINIMUM AND 0.113 INCHES MAXIMUM
HEAD STYLE	FILLISTER
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A575 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A576 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A575 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A576 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 1010 OR STEEL COMP 1020 OVERALL
NOMINAL THREAD DIAMETER	0.164 INCHES
SPECIAL FEATURES	CONE POINT,COUNTERSINK UNDER HEAD 0.040 INCHES HEIGHT
SURFACE TREATMENT	CHROMATE ZINC OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.250 INCHES MINIMUM
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)

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