5305-01-221-3151, SCREW,EXTERNALLY RELIEVED BODY

5305-01-221-3150 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-221-3151

Federal Supply Class:
5305

National Item Identification Number:
012213151

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:

912620-14	22525	INSTRUMENTS AND FLIGHT RESEARCH INC.
912620-14	94271	LOCKHEED MARTIN CORP
LL-HX4-2640	14153	DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA

Techincal Specification:

CRITICALITY CODE JUSTIFICATION	ZZZY
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.812 INCHES MINIMUM AND 0.938 INCHES MAXIMUM FIRST HOLE
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.499 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	2.187 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.281 INCHES NOMINAL
HEAD DIAMETER	0.750 INCHES NOMINAL
HEAD HEIGHT	0.438 INCHES NOMINAL
HEAD STYLE	KNURLED NO. 1
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.375 INCHES
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS	AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS
SHANK UNTHREADED HOLE DIAMETER	0.063 INCHES MINIMUM AND 0.065 INCHES MAXIMUM FIRST HOLE
SPECIAL TEST FEATURES	SPECIAL QUALITY CONTROL TESTING
SURFACE TREATMENT	PASSIVATE OVERALL
TEST DATA DOCUMENT	81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.688 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	16

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