The Gasket, cataloged under National Stock Number 5330-01-491-8639, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-491-8639 |
| Primary Part Number | 4L6145 NON-ASBESTOS |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.031 INCHES NOMINAL IN |
| Inside Corner Inverted Radius | 0.500 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Aperture Width | 3.000 INCHES NOMINAL IN |
| Aperture Length | 7.500 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 3.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Center to Center Distance Between Bolt Holes Along Width | 3.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.500 INCHES NOMINAL IN |
| Environmental Attribute Code | ASBESTOS ALTERNATIVE PRODUCTS |
| Outside Corner Radius | 0.500 INCHES NOMINAL IN |
| Hole Diameter | 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| 4L6145 NON-ASBESTOS PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5330-01-491-8639 is a Gasket, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-491-8639 has 1 manufacturer part number on file: 4L6145 NON-ASBESTOS (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4L6145 NON-ASBESTOS: Cross-Sectional Thickness: 0.031 INCHES NOMINAL IN; Inside Corner Inverted Radius: 0.500 INCHES NOMINAL IN; Overall Length: 8.500 INCHES NOMINAL IN; Cross-Sectional Shape Style: SOLID SINGLE OR COMPOSITION. 13 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.