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National Stock Number:
5305-01-081-8466
Federal Supply Class:
5305
National Item Identification Number:
010818466
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:
| 16U116-121 | 81755 | LOCKHEED MARTIN CORPORATION | | 16U116-123 | 81755 | LOCKHEED MARTIN CORPORATION | | 16U116-77 | 81755 | LOCKHEED MARTIN CORPORATION | | 16U116-809 | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.530 INCHES MINIMUM | | FASTENER LENGTH | 7.770 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD HEIGHT | 0.625 INCHES NOMINAL | | POINT STYLE | FLAT | | POINT LENGTH | 0.100 INCHES NOMINAL | | POINT DIAMETER | 0.185 INCHES MINIMUM AND | | 0.192 INCHES MAXIMUM | | POINT CHAMFER ANGLE | 80.0 DEGREES MINIMUM AND | | 100.0 DEGREES MAXIMUM | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.432 INCHES MINIMUM AND | | 0.442 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 2.120 INCHES NOMINAL FIRST SHOULDER | | SPECIAL FEATURES | HEAD UNDERCUT 0.060 IN. DEEP BY 0.550 IN. MIN 0.600 IN. MAX DIA | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 81755 | | DESIGN CONTROL REFERENCE | 16U116-77 |
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