5305-01-248-5731, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-248-5731

Federal Supply Class:
5305

National Item Identification Number:
012485731

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:

1213D1597FIND189	03538	LOCKHEED MARTIN CORPORATION
1213D1597FIND189	54497	MARTIN MARIETTA TECHNOLOGIES INC SUB OF MARTIN MARIETTA CORP AERO AND NAVAL SYSTEMS
1217B0407	03538	LOCKHEED MARTIN CORPORATION
1217B0407	54497	MARTIN MARIETTA TECHNOLOGIES INC SUB OF MARTIN MARIETTA CORP AERO AND NAVAL SYSTEMS
5305PL1274277	9009H	INSPEKTORAT WSPARCIA SIL ZBROJNYCH

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.110 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.500 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.134 INCHES NOMINAL
HEAD DIAMETER	0.385 INCHES NOMINAL
HEAD HEIGHT	0.080 INCHES NOMINAL
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
LOCKING FEATURE	PATCH THREADS
MATERIAL DOCUMENT AND CLASSIFICATION	FED-STD66 FED STD ALL MATERIAL RESPONSES FASTENER
MATERIAL	PLASTIC POLYAMIDE NYLON LOCKING FEATURE
MATERIAL	STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 FASTENER
MINIMUM TENSILE STRENGTH	80000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.190 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE FASTENER
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.310 INCHES NOMINAL
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)

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