5305-01-163-9286, THUMBSCREW

National Stock Number:
5305-01-163-9286

Federal Supply Class:
5305

National Item Identification Number:
011639286

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:

SC-B-577975

80063

US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.625 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.000 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	1.500 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.500 INCHES NOMINAL
HEAD DIAMETER	1.000 INCHES NOMINAL
HEAD HEIGHT	0.250 INCHES NOMINAL
HEAD STYLE	DOUBLE CHAMFER
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
POINT STYLE	CONE
SECOND DIAMETER FROM HEAD	0.125 INCHES NOMINAL
SHOULDER DIAMETER	0.500 INCHES NOMINAL FIRST SHOULDER
SHOULDER SHAPE	ROUND FIRST SHOULDER
SHOULDER LENGTH	0.625 INCHES NOMINAL FIRST SHOULDER
SPECIAL FEATURES	KNURLED HEAD; LOCKINGDEVICE ON BEARING SURFACE OF SHOULDER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.500 INCHES NOMINAL
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNC

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