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National Stock Number:
5305-01-210-9426
Federal Supply Class:
5305
National Item Identification Number:
012109426
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:
| 75D111248-2001 | 14248 | HARLOW AEROSTRUCTURES, LLC | | 75D111248-2001 | 51150 | WAINWRIGHT ENTERPRISES, L.L.C. | | 75D111248-2001 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.623 INCHES NOMINAL | | FASTENER LENGTH | 4.330 INCHES NOMINAL | | SURFACE TREATMENT | ENAMEL HEAD | | CADMIUM GRIP | | CADMIUM THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PS13318 MFR REF SINGLE TREATMENT RESPONSE HEAD | | PS13145,TY2,CL2 MFR REF SINGLE TREATMENT RESPONSE GRIP | | PS13145,TY2,CL2 MFR REF SINGLE TREATMENT RESPONSE THREADS | | HEAD STYLE | KNURLED NO. 4 | | HEAD DIAMETER | 2.000 INCHES NOMINAL | | HEAD HEIGHT | 0.370 INCHES NOMINAL | | SHOULDER SHAPE | ROUND ALL SHOULDERS | | SHOULDER DIAMETER | 1.165 INCHES NOMINAL FIRST SHOULDER | | 0.748 INCHES MINIMUM AND | | 0.749 INCHES MAXIMUM SECOND SHOULDER | | SHOULDER LENGTH | 0.380 INCHES NOMINAL FIRST SHOULDER | | 3.190 INCHES NOMINAL SECOND SHOULDER | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FIRST DIAMETER FROM HEAD | 0.412 INCHES MINIMUM AND | | 0.422 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.127 INCHES MINIMUM AND | | 0.152 INCHES MAXIMUM | | SPECIAL FEATURES | APPLY ONE COAT OF MMS405 EPOXY PRIMER PLUS TWO COATS OF MMS 420 ENAMEL,COLOR YELLOW NO. 13538 PER FED-STD-595 PER PS13318 TOFIRST SHOULDER. APPLY DRY FILM LUBRICANT PER PS18021 TO THREADS,HOLE DRILLED IN SHANK 1.860 FROM HEAD 0.125 MIN. AND 0.129 MAX. DIA. |
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