5305-00-454-0376, THUMBSCREW

National Stock Number:
5305-00-454-0376

Federal Supply Class:
5305

National Item Identification Number:
004540376

Description:
THUMBSCREW

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use SCREW (as modified) or BOLT (as modified).

Manufacturer Information:

FFT305	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MS21316-39	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

FASTENER LENGTH	2.406 INCHES MINIMUM AND 2.594 INCHES MAXIMUM
HEAD HEIGHT	0.560 INCHES MINIMUM AND 0.640 INCHES MAXIMUM
HEAD STYLE	THUMB NO. 3
MATERIAL	STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 324 OR STEEL COMP 347 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
POINT STYLE	FLAT
SPECIAL FEATURES	MINIMUM TENSILE STRENGTH OF 48.000 P.S.I.
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	2.281 INCHES MINIMUM AND 2.594 INCHES MAXIMUM
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
WIDTH BETWEEN FLATS	0.480 INCHES MINIMUM AND 0.630 INCHES MAXIMUM

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