The Valve,check, cataloged under National Stock Number 4820-01-418-2047, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is R & M Energy Systems Tomball P. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-418-2047 |
| Primary Part Number | 011798 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | R & M Energy Systems Tomball P |
| Status | ACTIVE |
| Mounting Position | VERTICAL |
| Style Designator | SCREW-IN CARTRIDGE |
| 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 |
|---|---|
| 011798 PRIMARY | R & M Energy Systems Tomball P (USA) |
| Reference | Meaning |
|---|---|
| LR163714 | D/9 Drawing number reference only R & M Energy Systems Tomball P |
NSN 4820-01-418-2047 is a Valve,check, manufactured by R & M Energy Systems Tomball P, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-418-2047 has 1 manufacturer part number on file: 011798 (R & M Energy Systems Tomball P).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-418-2124. Verify interchangeability with system specifications before substitution.
Key specifications for 011798: Mounting Position: VERTICAL; Style Designator: SCREW-IN CARTRIDGE; Special Features: USED ON RESUN MFG CO., 3.0IN.FIG D953 AND D450 LUBRICATED PLUG VALVE IN; End Item Identification: 3895-01-344-5480 TANKLESS TYPE LIQUID BITUMINOUS MATERIAL DISTRIBUTOR. 2 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.