5305-00-121-2155, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-121-2155

Federal Supply Class:
5305

National Item Identification Number:
001212155

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:

MX120-21

06989

AMERICAN PRECISION INDUSTRIES, INC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.014 INCHES MINIMUM AND 0.026 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.040 INCHES NOMINAL
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	80
THREAD SERIES DESIGNATOR	UNF
HEAD DIAMETER	0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM
HEAD HEIGHT	0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 416 OVERALL
III PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL THREAD DIAMETER	0.060 INCHES
THREAD LENGTH	0.102 INCHES MINIMUM AND 0.108 INCHES MAXIMUM
THREAD CLASS	2A

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