The Plug,protective,dust and Moistur, cataloged under National Stock Number 5340-00-021-3057, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Cosmodyne, Llc Dba Cosmodyne Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-021-3057 |
| Primary Part Number | 52A3751 |
| Item Name | Plug,protective,dust and Moistur |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne Llc |
| Status | ACTIVE |
| Design Type | THREADED |
| Overall Diameter | 1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN |
| Drive Type | SERRATED |
| Thread Pitch Diameters | +1.7160 TO 1.7395 INCHES IN |
| Thread Class | 2A A |
| Material | PLASTIC, POLYETHYLENE (PP) |
| Thread Size and Series/type Designator | 1.875-4 ACME C |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 52A3751 PRIMARY | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| Reference | Meaning |
|---|---|
| 160001-P133 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5340-00-021-3057 is a Plug,protective,dust and Moistur, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-021-3057 has 1 manufacturer part number on file: 52A3751 (Cosmodyne, Llc Dba Cosmodyne Llc).
1 possible match (shared part number, not a government interchangeability claim): 1740-00-612-2454. Verify interchangeability with system specifications before substitution.
Key specifications for 52A3751: Design Type: THREADED; Overall Diameter: 1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN; Drive Type: SERRATED; Thread Pitch Diameters: +1.7160 TO 1.7395 INCHES IN. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.