The Gasket, cataloged under National Stock Number 5330-01-254-2580, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-254-2580 |
| Primary Part Number | C057002 ITEM 27 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Cross-Sectional Thickness | 1.374 INCHES MINIMUM AND 1.384 INCHES MAXIMUM IN |
| Precious Material | SILVER |
| Outside Diameter | 9.843 INCHES MINIMUM AND 9.859 INCHES MAXIMUM IN |
| Aperture Diameter | 8.688 INCHES MINIMUM AND 8.704 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | EXTERNAL SURFACES SILVER |
| Material | IRON OVERALL |
| 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 |
|---|---|
| C057002 ITEM 27 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 110792 | 5/9 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 5330-01-254-2580 is a Gasket, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-254-2580 has 1 manufacturer part number on file: C057002 ITEM 27 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 5998-01-293-8958, 7690-01-575-2865, 6685-01-601-9439. Verify interchangeability with system specifications before substitution.
Key specifications for C057002 ITEM 27: Cross-Sectional Thickness: 1.374 INCHES MINIMUM AND 1.384 INCHES MAXIMUM IN; Precious Material: SILVER; Outside Diameter: 9.843 INCHES MINIMUM AND 9.859 INCHES MAXIMUM IN; Aperture Diameter: 8.688 INCHES MINIMUM AND 8.704 INCHES MAXIMUM 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.