The Seal Ring,metal, cataloged under National Stock Number 5330-01-452-9497, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-452-9497 |
| Primary Part Number | M1904DH |
| Item Name | Seal Ring,metal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Radial Wall Thickness | 0.0800 INCHES MINIMUM AND 0.0850 INCHES MAXIMUM 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 |
|---|---|
| M1904DH PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| 26179 | Aceomatic Transmission Parts (USA) |
| 7010126 | Marine Corps Systems Command Program Manager Assault Amphibious Vehicle |
| Reference | Meaning |
|---|---|
| 26226 | 5/9 Secondary reference Aceomatic Transmission Parts |
| 26226 | 5/9 Secondary reference Marine Corps Systems Command Program Manager Assault Amphibious Vehicle |
NSN 5330-01-452-9497 is a Seal Ring,metal, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-452-9497 has 3 manufacturer part numbers on file: M1904DH (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 26179 (Aceomatic Transmission Parts), 7010126 (Marine Corps Systems Command Program Manager Assault Amphibious Vehicle).
1 possible match (shared part number, not a government interchangeability claim): 1560-01-592-8779. Verify interchangeability with system specifications before substitution.
Key specifications for M1904DH: Overall Width: 0.0925 INCHES MINIMUM AND 0.0935 INCHES MAXIMUM IN; Outside Diameter: 1.750 INCHES NOMINAL IN; Radial Wall Thickness: 0.0800 INCHES MINIMUM AND 0.0850 INCHES MAXIMUM IN. 2 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.