The Valve Subassembly, cataloged under National Stock Number 2815-00-337-9181, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Cooper Machinery Services Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2815-00-337-9181 |
| Primary Part Number | JS81-4D |
| Item Name | Valve Subassembly |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,5.670 IN. L,0.875 IN. H,0.125 IN. THICKNESS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| JS81-4D PRIMARY | Cooper Machinery Services Llc (USA) |
| Reference | Meaning |
|---|---|
| JS-81-4D | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 2815-00-337-9181 is a Valve Subassembly, manufactured by Cooper Machinery Services Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-337-9181 has 1 manufacturer part number on file: JS81-4D (Cooper Machinery Services Llc).
Key specifications for JS81-4D: General Characteristics Item Description: STEEL,5.670 IN. L,0.875 IN. H,0.125 IN. THICKNESS IN. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.