The Gasket, cataloged under National Stock Number 5330-00-657-8023, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is The United Tool & Die Company. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5330-00-657-8023 |
| Primary Part Number | 375290 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | The United Tool & Die Company |
| Status | ACTIVE |
| Inside Corner Radius | 0.188 INCHES NOMINAL IN |
| Precious Material | SILVER |
| Material Document and Classification | AMS 4500 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Smallest Bolt Hole Diameter | 0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR METAL |
| Aperture Width | 0.630 INCHES NOMINAL IN |
| Aperture Length | 1.250 INCHES NOMINAL IN |
| Precious Material and Location | EXTERNAL SURFACES SILVER |
| Largest Bolt Hole Diameter | 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN |
| Outside Corner Radius | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY 110 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5330-00-657-8023 is a Gasket, manufactured by The United Tool & Die Company, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-657-8023 has 2 manufacturer part numbers on file: 375290 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 375290 (The United Tool & Die Company).
1 possible match (shared part number, not a government interchangeability claim): 5342-01-035-9951. Verify interchangeability with system specifications before substitution.
Key specifications for 375290: Inside Corner Radius: 0.188 INCHES NOMINAL IN; Precious Material: SILVER; Material Document and Classification: AMS 4500 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Overall Length: 1.750 INCHES NOMINAL IN. 11 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.