The Gasket, cataloged under National Stock Number 5330-00-491-5490, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-491-5490 |
| Primary Part Number | S31018-2CP |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Style Designator | CIRCULAR |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 0.594 INCHES MINIMUM AND 0.599 INCHES MAXIMUM IN |
| Aperture Diameter | 0.438 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Material | PLASTIC POLYPROPYLENE OVERALL |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| S31018-2CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 21-19566MKACP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| S31018-2 | 3/1 Design control — primary reference U.S. Government activity |
| 21-19566MKA | 5/9 Secondary reference U.S. Government activity |
NSN 5330-00-491-5490 is a Gasket, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-491-5490 has 2 manufacturer part numbers on file: S31018-2CP (Naval Inventory Control Point Mechanicsburg), 21-19566MKACP (Naval Inventory Control Point Mechanicsburg).
Key specifications for S31018-2CP: Cross-Sectional Thickness: 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY; Style Designator: CIRCULAR; Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION. 8 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.