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National Stock Number:
5305-01-241-2641
Federal Supply Class:
5305
National Item Identification Number:
012412641
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:
| 74D291037 | 76301 | THE BOEING COMPANY | | 74D291037-2061 | 76301 | THE BOEING COMPANY | | PL74D291037 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 7.420 INCHES NOMINAL | | HEAD DIAMETER | 0.500 INCHES NOMINAL | | HEAD HEIGHT | 0.380 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | | POINT STYLE | FLAT | | SPECIAL FEATURES | HOLE DRILLED IN CENTER OF HEAD 0.048 INCH MIN 0.083 INCH MAX DIA; 0.184 INCH MAX DEEP; COUNTERSUNK 60 DEG TO 0.187 INCH DIA MAX OPTIONAL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.000 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 28 |
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