The Seal,plain Encased, cataloged under National Stock Number 5330-00-291-8953, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-291-8953 |
| Primary Part Number | 7418409 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Seal Width | 0.266 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN |
| Sealing Element Style | ANGULAR |
| Housing Bore Diameter | 0.907 INCHES MINIMUM AND 0.911 INCHES MAXIMUM IN |
| Case Style | SQUARE |
| Accommodated Shaft Diameter | 0.436 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Material | STEEL CASE |
| 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 |
|---|---|
| 7418409 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 121687 | 5/9 Secondary reference Tappan Co the |
| 121687 | 5/9 Secondary reference Arnold a Semler Inc |
| K1552 | 5/9 Secondary reference Pierce Co Inc the Sub of Avis Industrial Corp |
NSN 5330-00-291-8953 is a Seal,plain Encased, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-291-8953 has 1 manufacturer part number on file: 7418409 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-645-8461. Verify interchangeability with system specifications before substitution.
Key specifications for 7418409: Seal Width: 0.266 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN; Sealing Element Style: ANGULAR; Housing Bore Diameter: 0.907 INCHES MINIMUM AND 0.911 INCHES MAXIMUM IN; Case Style: SQUARE. 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.