The Cap,valve, cataloged under National Stock Number 4820-01-187-1303, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-187-1303 |
| Primary Part Number | M-12961-3 |
| Item Name | Cap,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Valve Type for Which Designed | FLUID PRESSURE REGULATING |
| Height | 1.344 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| M-12961-3 PRIMARY | Grove Valve Operations (USA) |
| N-846A PIECE 1 | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| 144-21041 | C/1 Advisory reference — outside the item-of-supply concept Grove Valve Operations |
| N-846A | D/9 Drawing number reference only Grove Valve Operations |
NSN 4820-01-187-1303 is a Cap,valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-187-1303 has 2 manufacturer part numbers on file: M-12961-3 (Grove Valve Operations), N-846A PIECE 1 (Grove Valve Operations).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-187-1479, 4820-01-221-4358. Verify interchangeability with system specifications before substitution.
Key specifications for M-12961-3: Valve Type for Which Designed: FLUID PRESSURE REGULATING; Height: 1.344 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING. 3 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.