The Seal,plain, cataloged under National Stock Number 5330-01-391-9702, 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 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-391-9702 |
| Primary Part Number | 6641188FN A31 |
| Item Name | Seal,plain |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Cross-Sectional Shape Style | SINGLE LIP |
| Accommodated Shaft Diameter | 2.500 INCHES NOMINAL IN |
| Construction | ONE-PIECE |
| 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 |
|---|---|
| 6641188FN A31 PRIMARY | Naval Sea Systems Command (USA) |
| 6641188FN B31 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 461518702500-375B | 5/1 Secondary reference Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps) |
| ESCL-333DB | 5/9 Secondary reference U.S. Government activity |
| 801-6641188FNA31 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5330-01-391-9702 is a Seal,plain, manufactured by Naval Sea Systems Command, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-391-9702 has 2 manufacturer part numbers on file: 6641188FN A31 (Naval Sea Systems Command), 6641188FN B31 (Naval Sea Systems Command).
Key specifications for 6641188FN A31: Cross-Sectional Shape Style: SINGLE LIP; Special Features: MATERIAL: MOLYTHANE OVERALL; Accommodated Shaft Diameter: 2.500 INCHES NOMINAL IN; Construction: ONE-PIECE. 3 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.