The Seal,plain Encased, cataloged under National Stock Number 5330-01-660-1518, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-01-660-1518 |
| Primary Part Number | EP3500-40P73-STRN |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Lip Inside Diameter | 3.50 INCHES NOMINAL IN |
| Seal Width | 0.640 INCHES NOMINAL IN |
| Cross-Sectional Thickness | 0.750 INCHES NOMINAL IN |
| Sealing Element Style | VERTICAL |
| Material Document and Classification | PELLATHANE 2103-70A MFR REF SINGLE MATERIAL RESPONSE SEALING ELEMENT A |
| Material Document and Classification | CONNECTOR STAINLESS STEEL PER MT-14,CLAMP IAW NSN 4730-01-518-5352 MFR REF SINGLE MATERIAL RESPONSE CASE |
| Case Style | RECESSED |
| Base Outside Diameter | 3.90 INCHES NOMINAL IN |
| Accommodated Shaft Diameter | 3.25 INCHES NOMINAL IN |
| Center Hole Diameter | 3.28 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING CASE |
| Material | PLASTIC POLYURETHANE 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 |
|---|---|
| EP3500-40P73-STRN PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| STD-820-6896275(MT-44) | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5330-01-660-1518 is a Seal,plain Encased, manufactured by Naval Sea Systems Command, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-660-1518 has 1 manufacturer part number on file: EP3500-40P73-STRN (Naval Sea Systems Command).
Key specifications for EP3500-40P73-STRN: Lip Inside Diameter: 3.50 INCHES NOMINAL IN; Seal Width: 0.640 INCHES NOMINAL IN; Cross-Sectional Thickness: 0.750 INCHES NOMINAL IN; Sealing Element Style: VERTICAL. 12 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.