The Seal,plain, cataloged under National Stock Number 5330-01-618-6631, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Smith System Manufacturing Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Seal,plain |
| FSC / FSG | 5330 — Packing and Gasket Materials (FSG 53) |
| Manufacturers | Smith System Manufacturing Co (CAGE 15435) |
| Parameter | Value |
|---|---|
| NSN | 5330-01-618-6631 |
| Primary Part Number | 4918075 |
| Item Name | Seal,plain |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Smith System Manufacturing Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 4918075 PRIMARY | Smith System Manufacturing Co (USA) |
NSN 5330-01-618-6631 is a Seal,plain, manufactured by Smith System Manufacturing Co, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-618-6631 has 1 manufacturer part number on file: 4918075 (Smith System Manufacturing Co).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-664-8239. Verify interchangeability with system specifications before substitution.
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.