The Retainer,seal, cataloged under National Stock Number 5330-01-241-3553, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-241-3553 |
| Primary Part Number | EJ-31145 |
| Item Name | Retainer,seal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Flange Thickness | 0.250 INCHES NOMINAL IN |
| Bolt Hole Diameter | 0.281 INCHES NOMINAL IN |
| Seal Seat Diameter | 2.812 INCHES NOMINAL IN |
| Aperture Diameter | 2.562 INCHES NOMINAL IN |
| Bolt Hole Quantity | 3 |
| Bolt Circle Diameter | 3.375 INCHES NOMINAL IN |
| Mounting Flange Diameter | 4.000 INCHES NOMINAL IN |
| Material | STEEL COMP 1141 AND LEAD OVERALL |
| Construction | SOLID |
| 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 |
|---|---|
| EJ-31145 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| EJ-30056 | 3/9 Design control — primary reference The Entwistle Company Llc |
NSN 5330-01-241-3553 is a Retainer,seal, manufactured by The Entwistle Company Llc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-241-3553 has 1 manufacturer part number on file: EJ-31145 (The Entwistle Company Llc).
Key specifications for EJ-31145: Overall Height: 2.656 INCHES NOMINAL IN; Flange Thickness: 0.250 INCHES NOMINAL IN; Bolt Hole Diameter: 0.281 INCHES NOMINAL IN; Seal Seat Diameter: 2.812 INCHES NOMINAL IN. 9 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.