The Seal Ring,metal, cataloged under National Stock Number 5330-01-257-8052, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-257-8052 |
| Item Name | Seal Ring,metal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Cross-Sectional Shape Style | PLAIN KEYSTONE, STRAIGHT FACE |
| Outside Diameter | 9.499 INCHES MINIMUM AND 9.504 INCHES MAXIMUM IN |
| Ring Style | EXPANDING CONCENTRIC |
| Material | STEEL OVERALL |
| Metallic Hardness Rating | 100.0 MAXIMUM BRINELL STANDARD |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 820-6015895-240-1 | 5/1 Secondary reference U.S. Government activity |
| 820-6015895 | 5/1 Secondary reference U.S. Government activity |
| 820-6015895-240-1 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 5330-01-257-8052 is a Seal Ring,metal, classified under FSC 5330, Packing and Gasket Materials. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-505-3763. Verify interchangeability with system specifications before substitution.
Key specifications for 5330-01-257-8052: Criticality Code Justification: ZZZY; Overall Width: 0.7450 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN KEYSTONE, STRAIGHT FACE; Outside Diameter: 9.499 INCHES MINIMUM AND 9.504 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.