The Plug,leakproof Seal, cataloged under National Stock Number 5340-01-493-4252, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Shaw Development, Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Cancelled. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-493-4252 |
| Primary Part Number | 56993 |
| Item Name | Plug,leakproof Seal |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Shaw Development, Llc |
| Status | CANCELLED |
| Overall Diameter | 0.250 INCHES NOMINAL IN |
| Accessory Components and Quantity | INCLUDES T HANDLE AND WASHER |
| Pressure Rating | ERR-060 |
| Special Markings | CAUTION, DO NOT PULL UNTIL PRESSURE RELEASED |
| Material | RUBBER SYNTHETIC AND STEEL |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 56993 PRIMARY | Shaw Development, Llc (USA) |
| Reference | Meaning |
|---|---|
| JCM-17838 | 5/9 Secondary reference Strike Weapons and Unmanned Aviation |
NSN 5340-01-493-4252 is a Plug,leakproof Seal, manufactured by Shaw Development, Llc, classified under FSC 5340, Hardware, Commercial. Status: cancelled.
NSN 5340-01-493-4252 has 1 manufacturer part number on file: 56993 (Shaw Development, Llc).
Key specifications for 56993: Overall Diameter: 0.250 INCHES NOMINAL IN; Overall Length: 3.770 INCHES NOMINAL IN; Accessory Components and Quantity: INCLUDES T HANDLE AND WASHER; Pressure Rating: ERR-060. 5 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.
NSN 5340-01-493-4252 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.