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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:
| FASTENER LENGTH | 7.770 INCHES NOMINAL | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD HEIGHT | 0.625 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | POINT CHAMFER ANGLE | 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM | | POINT DIAMETER | 0.185 INCHES MINIMUM AND 0.192 INCHES MAXIMUM | | POINT LENGTH | 0.100 INCHES NOMINAL | | SHOULDER DIAMETER | 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER SHAPE | ROUND 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 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.530 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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