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National Stock Number:
5325-00-558-1021
Federal Supply Class:
5325
National Item Identification Number:
005581021
Description:
INSERT,SCREW THREAD
Detail:
A cylindrical item which may have wrenching and/or driving facilities and/or shoulders. It is designed to be inserted in a drilled or a pretapped hole, or molded or pressed into soft material to reduce the size of a tapped hole; to provide threads; to add strength, and/or to prevent stripping. It is one of the following: (1) a one-piece, flanged or unflanged, internally threaded item which may have external threads, and/or serrations around the periphery of the collar, designed to engage a serrated lock ring which is not included with the item; (2) a one-piece precision coiled wire; (3) a two-piece item consisting of an internally threaded cylinder and a mating externally threaded part; or (4) a one-piece internally threaded item whose outside diameter is tapered and/or knurled and/or with fin(s). The internal thread of the item may have a locking feature. Excludes items having a sleeve on its underportion which can be clinched or crimped. Excludes BUSHING, MACHINE THREAD; NUT, PLAIN, KNURLED; NUT, PLAIN, ROUND; NUT, PLAIN, CLINCH and NUT, SELF-LOCKING, CLINCH. See also NUT, PLAIN, PLATE.
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Manufacturer Information:
| 2142596-2 | 55974 | HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS FORMER TEST SYSTEMS DIV | | 2142596-2 | 76301 | THE BOEING COMPANY | | KNKDL420 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | KNKDL420J | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. |
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Techincal Specification:
| FEATURES PROVIDED | INDIVIDUALLY KEYED | | FULL INTERNAL THREAD LENGTH | 0.250 INCHES NOMINAL | | INSERT SIZE | 0.500-20 UNF 2A | | INTERNAL THREAD RELIEF DEPTH | 0.150 INCHES NOMINAL | | LENGTH | 0.385 INCHES MINIMUM AND 0.415 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4140 OVERALL | | NOMINAL THREAD SIZE | 0.250 INCHES | | STYLE DESIGNATOR | KEYLOCK | | THREAD CLASS | 3B | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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