5305-01-321-8741, SCREW ASSEMBLY,PANEL

National Stock Number:
5305-01-321-8741

Federal Supply Class:
5305

National Item Identification Number:
013218741

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:

3M869-3A3.5	76301	THE BOEING COMPANY
CS3047-3A3.5#	58998	FASTENER INNOVATION TECHNOLOGY, INC.
HSG7900-3A3.5	0HDW7	HUCK INTERNATIONAL, INC.
HSG7900-3A3.5	97928	HUCK INTL INC

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.190 INCHES
THREAD QUANTITY PER INCH	32
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.281 INCHES NOMINAL
FASTENER LENGTH	0.912 INCHES MINIMUM AND
	0.942 INCHES MAXIMUM
MATERIAL	STEEL COMP 302 SPRING
	STEEL COMP 304 STAND-OFF
	IRON ALLOY 660 FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A580 ASSN STD SINGLE MATERIAL RESPONSE SPRING
	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF
	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.105 INCHES MINIMUM AND
	0.120 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.305 INCHES MINIMUM AND
	0.312 INCHES MAXIMUM
INTERNAL DRIVE STYLE	SLOT
MATERIAL ACCOMMODATED THICKNESS	0.031 INCHES MINIMUM AND
	0.062 INCHES MAXIMUM

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