The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-491-2851, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Atlas Copco. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-491-2851 |
| Primary Part Number | 51241164 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Atlas Copco |
| Status | ACTIVE |
| 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 |
|---|---|
| 86453719 | Montabert (FRA) |
| 51241164 PRIMARY | Atlas Copco (USA) |
| Reference | Meaning |
|---|---|
| 51241164 | 5/9 Secondary reference Epiroc Drilling Solutions Llc |
| 86453719 | 3/9 Design control — primary reference Atlas Copco |
| 86453719 | 5/1 Secondary reference Tramac Corporation |
NSN 4820-01-491-2851 is a Diaphragm,actuator Valve,special, manufactured by Atlas Copco, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-491-2851 has 2 manufacturer part numbers on file: 86453719 (Montabert), 51241164 (Atlas Copco).
Key specifications for 51241164: End Item Identification: CONTRACTOR LOGISTICS LIFETIME SUPPORT (CRLS), HYDRAULIC EXCAVATOR TYPE 2 (HYEX) (MODEL 230 LCRD HX2) NSN 3805-01-463-0806, TM5-3805-280-24-P. 0 specifications are 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.