The Valve,check, cataloged under National Stock Number 4820-01-272-6667, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-272-6667 |
| Primary Part Number | 011797 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | R & M Energy Systems Tomball P |
| Status | ACTIVE |
| Material | STEEL BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 011797 PRIMARY | R & M Energy Systems Tomball P (USA) |
| LR145189 PIECE 5 2IN. | R & M Energy Systems Tomball P (USA) |
| Reference | Meaning |
|---|---|
| LR145189 PIECE | C/1 Advisory reference — outside the item-of-supply concept R & M Energy Systems Tomball P |
| LR145189 | D/9 Drawing number reference only R & M Energy Systems Tomball P |
NSN 4820-01-272-6667 is a Valve,check, manufactured by R & M Energy Systems Tomball P, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-272-6667 has 2 manufacturer part numbers on file: 011797 (R & M Energy Systems Tomball P), LR145189 PIECE 5 2IN. (R & M Energy Systems Tomball P).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-272-6670, 4820-01-418-2125, 4820-01-418-2126. Verify interchangeability with system specifications before substitution.
Key specifications for 011797: Material: STEEL BODY; Valve Operation Method: AUTOMATIC. 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.