The Valve,rotalock, cataloged under National Stock Number 4820-01-572-3418, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bristol Compressors International, Inc.. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Valve,rotalock |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (CAGE 38450); Bristol Compressors International, Inc. (CAGE 3RKF8) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-572-3418 |
| Primary Part Number | 250507 |
| Item Name | Valve,rotalock |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bristol Compressors International, Inc. |
| 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 |
|---|---|
| 18-045-109 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| 250507 PRIMARY | Bristol Compressors International, Inc. (USA) |
| 1620C0700P ITEM NO 2 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
NSN 4820-01-572-3418 is a Valve,rotalock, manufactured by Bristol Compressors International, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-572-3418 has 3 manufacturer part numbers on file: 18-045-109 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil), 250507 (Bristol Compressors International, Inc.), 1620C0700P ITEM NO 2 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
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.