The Seal Ring,metal, cataloged under National Stock Number 5330-00-618-1609, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Steward Machine Co Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-618-1609 |
| Primary Part Number | 277-396 |
| Item Name | Seal Ring,metal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Steward Machine Co Inc |
| Status | ACTIVE |
| FSC Application Data | STEAM TURBINE |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0450 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN |
| Ring Style | EXPANDING CONCENTRIC |
| 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 |
|---|---|
| 277-396 PRIMARY | Steward Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 60-656PC620 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 60-277PC396 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 60-620PC620 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 277-396 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
NSN 5330-00-618-1609 is a Seal Ring,metal, manufactured by Steward Machine Co Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-618-1609 has 1 manufacturer part number on file: 277-396 (Steward Machine Co Inc).
Key specifications for 277-396: FSC Application Data: STEAM TURBINE; Overall Width: 0.0500 INCHES MINIMUM AND 0.0580 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Outside Diameter: 1.375 INCHES NOMINAL 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.