The Seal,plain Encased, cataloged under National Stock Number 5330-00-071-1771, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Komatsu America Corp.. Government technical data includes 6 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-071-1771 |
| Primary Part Number | 678528C1 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Seal Width | 0.625 INCHES NOMINAL IN |
| Sealing Element Style | ANGULAR-OPPOSED |
| Housing Bore Diameter | 7.062 INCHES NOMINAL IN |
| Case Style | RECESSED |
| Accommodated Shaft Diameter | 6.000 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC SEALING ELEMENT |
| 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 |
|---|---|
| 678528C1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 601673C91 | 5/9 Secondary reference U.S. Government activity |
| 678528C1 | 3/9 Design control — primary reference Komatsu American Intl Co |
| 678536C91 | 5/9 Secondary reference Komatsu American Intl Co |
| 601673C91 | 5/9 Secondary reference Komatsu American Intl Co |
| 678536C91 | 5/9 Secondary reference U.S. Government activity |
NSN 5330-00-071-1771 is a Seal,plain Encased, manufactured by Komatsu America Corp., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-071-1771 has 1 manufacturer part number on file: 678528C1 (Komatsu America Corp.).
1 possible match (shared part number, not a government interchangeability claim): 3120-00-716-4061. Verify interchangeability with system specifications before substitution.
Key specifications for 678528C1: Seal Width: 0.625 INCHES NOMINAL IN; Sealing Element Style: ANGULAR-OPPOSED; Housing Bore Diameter: 7.062 INCHES NOMINAL IN; Case Style: RECESSED. 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.