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National Stock Number:
5305-01-298-7491
Federal Supply Class:
5305
National Item Identification Number:
012987491
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:
| 3279296 | 80064 | NAVAL SHIP SYSTEMS COMMAND | | A-37383-1PC17 | 15187 | EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP |
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Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | ZZZY | | HEAD HEIGHT | 0.875 INCHES MINIMUM AND 1.000 INCHES MAXIMUM | | HEAD STYLE | THUMB NO. 4 | | MATERIAL | STEEL COMP 1115 OVERALL | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | POINT STYLE | CONE | | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS | | WIDTH BETWEEN FLATS | 1.438 INCHES MINIMUM AND 1.562 INCHES MAXIMUM | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 2.750 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 14 | | THREAD SERIES DESIGNATOR | UNC |
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