5305-01-579-4007, THUMBSCREW

National Stock Number:
5305-01-579-4007

Federal Supply Class:
5305

National Item Identification Number:
015794007

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:

12443845	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
1410TS	1R9E6	KANEBRIDGE CORPORATION DBA DISTRIBUTOR OF FASTENERS DIV CORPORATE HEADQUARTERS

Techincal Specification:

COLOR	OLIVE DRAB OVERALL
FASTENER LENGTH	0.590 INCHES MINIMUM AND 0.650 INCHES MAXIMUM
HEAD HEIGHT	0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM
HEAD STYLE	THUMB NO. 4
MATERIAL DOCUMENT AND CLASSIFICATION	AMS-STD-66 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCY	SCREW, THUMB
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
POINT LENGTH	0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM
POINT STYLE	FLAT
POINT CHAMFER ANGLE	45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B633, TYPE II, FE/ZN8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	ZINC AND CHROMATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.590 INCHES MINIMUM AND 0.650 INCHES MAXIMUM
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
WIDTH BETWEEN FLATS	0.520 INCHES MINIMUM AND 0.550 INCHES MAXIMUM

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