The Gasket, cataloged under National Stock Number 5330-01-231-5927, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Ameridrives International Llc Dba Ameridrives International Llc. Government technical data includes 10 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 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 | 5330-01-231-5927 |
| Primary Part Number | 40257-4 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Ameridrives International Llc Dba Ameridrives International Llc |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.031 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Material Document and Classification | VELBESTOS 250 FSCM 79144 MFR REF ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 5.938 INCHES NOMINAL IN |
| Aperture Diameter | 3.625 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 4.812 INCHES NOMINAL IN |
| Material | ASBESTOS AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL |
| Hole Diameter | 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 40257-4 PRIMARY | Ameridrives International Llc Dba Ameridrives International Llc (USA) |
NSN 5330-01-231-5927 is a Gasket, manufactured by Ameridrives International Llc Dba Ameridrives International Llc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-231-5927 has 1 manufacturer part number on file: 40257-4 (Ameridrives International Llc Dba Ameridrives International Llc).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-235-1264. Verify interchangeability with system specifications before substitution.
Key specifications for 40257-4: Cross-Sectional Thickness: 0.031 INCHES NOMINAL IN; Style Designator: CIRCULAR; Material Document and Classification: VELBESTOS 250 FSCM 79144 MFR REF ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION. 10 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.