The Seal Ring,metal, cataloged under National Stock Number 5330-00-765-8176, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-765-8176 |
| Primary Part Number | 358159 |
| Item Name | Seal Ring,metal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Material Document and Classification | AMS 5613 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 20.460 INCHES MINIMUM AND 20.470 INCHES MAXIMUM IN |
| Ring Style | EXPANDING CONCENTRIC |
| Material | STEEL CORROSION RESISTING OVERALL |
| Metallic Hardness Rating | 30.0 MINIMUM ROCKWELL C AND 38.0 MAXIMUM ROCKWELL C |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 358159 | Union Machine Co of Lynn, Inc (USA) |
| 358159 | Paramount Machine Company, Inc. Dba Paramount Machine Co Inc (USA) |
| 358159 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 358159 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 358159 | 5/9 Secondary reference Permaloy Corp |
| 389466 | C/1 Advisory reference — outside the item-of-supply concept Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 358159 | 5/9 Secondary reference Electro-Methods, L.p. |
| 358159 | 5/9 Secondary reference Hoskins Mfg Co |
| 358159 | 5/9 Secondary reference South East Wheel and Rim Co |
| 389466 | C/1 Advisory reference — outside the item-of-supply concept Hoskins Mfg Co |
NSN 5330-00-765-8176 is a Seal Ring,metal, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-765-8176 has 4 manufacturer part numbers on file: 358159 (Union Machine Co of Lynn, Inc), 358159 (Paramount Machine Company, Inc. Dba Paramount Machine Co Inc), 358159 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 358159 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 358159: Criticality Code Justification: FEAT; Overall Width: 0.8100 INCHES MINIMUM AND 0.8300 INCHES MAXIMUM IN; Material Document and Classification: AMS 5613 ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 20.460 INCHES MINIMUM AND 20.470 INCHES MAXIMUM IN. 6 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.