5305-01-221-3503, SCREW ASSEMBLY,PANEL

National Stock Number:
5305-01-221-3503

Federal Supply Class:
5305

National Item Identification Number:
012213503

Description:
SCREW ASSEMBLY,PANEL

Detail:
A HEADED, THREADED FASTENING DEVICE OVER WHICH MAY BE ASSEMBLED; (1) A STAND-OFF; (2) A FLANGED BUSHING WITH WASHER(S) AND/OR A SHOULDERED BUSHING WITHOUT A FLANGE, OR IT MAY HAVE AN INTERNALLY THREADED SLEEVE THAT IS AN INTEGRAL PART OF THE SCREW; A WASHER AND AN EXTERNALLY THREAD SELF-LOCKING BUSHING THAT IS DRIVEN BY AN INSERTED DRIVER. ATTACHED TO PANEL BY THREADED BUSHING OR BY FLARING END OF STAND-OFF, OR BUSHING. USED IN CONJUNCTION WITH A SPEED NUT, NUT PLATE, OR DRIVEN INTO A THREADED HOLE IN THE ITEM THAT THE PANEL IS FASTENED TO. MAY BE SPRING LOADED.

Manufacturer Information:

B4013388-2	56996	DEPARTMENT OF THE ARMY HQ UNITED STATES ARMY COMMUNICATIONS RESEARCH AND DEVELOPMENT COMMAND
FT1195-2	58794	FASTENER TECHNOLOGY CORP
HLC7900-12C-F-5	0HDW7	HUCK INTERNATIONAL, INC.
T320014902	36090	LOCKHEED MARTIN LIBRASCOPE CORP
HLC7900-12C-F-5	97928	HUCK INTL INC

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	20
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.250 INCHES NOMINAL
FASTENER LENGTH	0.852 INCHES NOMINAL
MATERIAL	STEEL COMP 301 OR
	STEEL COMP 302 OR
	STEEL COMP 304 OR
	STEEL COMP 316 SECONDARY WASHER
	STEEL COMP 302 PRIMARY WASHER
	ALUMINUM ALLOY 6061 STAND-OFF
	IRON ALLOY 660 FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES SECONDARY WASHER
	QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF
	AMS5732 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE SECONDARY WASHER
	PASSIVATE PRIMARY WASHER
	ANODIZE STAND-OFF
	PASSIVATE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER
	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER
	MIL-A-8625,TYPE1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF
	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.172 INCHES MINIMUM AND
	0.190 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.428 INCHES MINIMUM AND
	0.438 INCHES MAXIMUM
INTERNAL DRIVE STYLE	SLOT
MATERIAL ACCOMMODATED THICKNESS	0.318 INCHES MINIMUM AND
	0.332 INCHES MAXIMUM

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