5305-01-120-9907, THUMBSCREW

National Stock Number:
5305-01-120-9907

Federal Supply Class:
5305

National Item Identification Number:
011209907

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:

MS21316-61

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

FASTENER LENGTH	2.910 INCHES MINIMUM AND 3.000 INCHES MAXIMUM
FEATURES PROVIDED	CASEHARDENED
HEAD HEIGHT	0.920 INCHES MINIMUM AND 0.950 INCHES MAXIMUM
HEAD STYLE	THUMB NO. 3
MATERIAL DOCUMENT AND CLASSIFICATION	66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 OVERALL
NOMINAL THREAD DIAMETER	0.375 INCHES
POINT STYLE	FLAT
WIDTH BETWEEN FLATS	0.800 INCHES MINIMUM AND 0.830 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR MIL-C-81562,TYPE 2,CLASS 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OR ZINC AND CHROMATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	2.754 INCHES MINIMUM AND 3.000 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	16

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