The Valve,safety Relief, cataloged under National Stock Number 4820-01-198-7311, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Control Devices, Incorporated. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-198-7311 |
| Primary Part Number | CA6-1A |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Control Devices, Incorporated |
| Status | ACTIVE |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS. |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Opening Pressure Setting | 105.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| CA6-1A PRIMARY | Control Devices, Incorporated (USA) |
| 4X996 | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| Reference | Meaning |
|---|---|
| CA-6 | 5/9 Secondary reference Control Devices, Incorporated |
| 4X996 | 5/9 Secondary reference Control Devices, Incorporated |
| 8223758-1 | 5/9 Secondary reference U.S. Government activity |
| 4X996 | 5/9 Secondary reference Grainger W W Inc |
NSN 4820-01-198-7311 is a Valve,safety Relief, manufactured by Control Devices, Incorporated, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-198-7311 has 2 manufacturer part numbers on file: CA6-1A (Control Devices, Incorporated), 4X996 (W.w. Grainger, Inc. Div Government Sales Division).
2 possible matches (shared part number, not a government interchangeability claim): 5995-01-292-9303, 5820-01-695-1351. Verify interchangeability with system specifications before substitution.
Key specifications for CA6-1A: Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.; Special Features: 0.750 IN. HEX BY 1.562 IN. LG IN; Media for Which Designed: AIR SINGLE RESPONSE. 6 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.