5305-01-300-2927, THUMBSCREW

National Stock Number:
5305-01-300-2927

Federal Supply Class:
5305

National Item Identification Number:
013002927

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:

D63549/1-042B	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
DOD-T-63549	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
DOD-T-63549/1	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD SERIES DESIGNATOR	M
NOMINAL THREAD DIAMETER	8.0 MILLIMETERS
THREAD PITCH IN MILLIMETERS	1.25
EXTERNAL THREAD TOLERANCE CLASS	6G
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	25.35 MILLIMETERS MINIMUM AND
	30.65 MILLIMETERS MAXIMUM
FASTENER LENGTH	29.35 MILLIMETERS MINIMUM AND
	30.65 MILLIMETERS MAXIMUM
MATERIAL	STEEL OVERALL
SURFACE TREATMENT	ZINC AND
	CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE	WING NO. 2
HEAD HEIGHT	19.35 MILLIMETERS MINIMUM AND
	20.65 MILLIMETERS MAXIMUM
WIDTH BETWEEN FLATS	39.20 MILLIMETERS MINIMUM AND
	40.80 MILLIMETERS MAXIMUM
SPEC/STD CONTROLLING DATA
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	DOD-T-63549
MANUFACTURERS CODE	81349
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	D63549/1-042B

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