5305-01-290-3756, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-290-3756

Federal Supply Class:
5305

National Item Identification Number:
012903756

Description:
SCREW,CAP,SOCKET HEAD

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.

Manufacturer Information:

1.250-12UNF-2A 5.000LG STLGR8CAD	80204	AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED
MIL-DTL-1222	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
MIL-S-1222	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	1.250 INCHES
THREAD QUANTITY PER INCH	12
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	2.500 INCHES MINIMUM AND
	2.710 INCHES MAXIMUM
FASTENER LENGTH	4.812 INCHES MINIMUM AND
	5.000 INCHES MAXIMUM
MATERIAL	PLASTIC POLYAMIDE LOCKING FEATURE
	STEEL FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	SAE GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SURFACE TREATMENT	CADMIUM AND
	CHROMATE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND
	38.0 ROCKWELL C MAXIMUM FASTENER
MINIMUM TENSILE STRENGTH	150000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH	130000 POUNDS PER SQUARE INCH
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.749 INCHES MINIMUM AND
	0.813 INCHES MAXIMUM
WIDTH BETWEEN FLATS	1.812 INCHES MINIMUM AND
	1.875 INCHES MAXIMUM
INTERNAL DRIVE STYLE	W/O INTERNAL DRIVE
LOCKING FEATURE	PATCH OR
	PELLET OR
	STRIP THREADS
FEATURES PROVIDED	FINISHED HEAD
NONDEFINITIVE SPEC/STD DATA	1 TYPE
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT

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