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National Stock Number:
5305-01-226-6737
Federal Supply Class:
5305
National Item Identification Number:
012266737
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).
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Manufacturer Information:
| 584-702003-1 | 19133 | MCDONNELL DOUGLAS CORP MCDONNELL DOUGLAS AEROSPACE OPNS WEST | | 584-702003-1 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 2.008 INCHES NOMINAL | | FASTENER LENGTH | 2.570 INCHES NOMINAL | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | KNURLED NO. 4 | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD HEIGHT | 0.310 INCHES NOMINAL | | POINT LENGTH | 0.312 INCHES NOMINAL | | POINT DIAMETER | 0.182 INCHES MINIMUM AND | | 0.192 INCHES MAXIMUM | | SPECIAL FEATURES | SHANK 0.200 INCH NOM DIA,0.250 INCH NOM LENGTH. UNDERCUT ON POINT END 0.070 INCH MIN AND 0.075 INCH MAX LONG. MEDIUM DIAMOND KNURLED HEAD |
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