The Cap,valve, cataloged under National Stock Number 4820-01-110-7651, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Twc-Thevalve Company. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-110-7651 |
| Primary Part Number | 7877-2-Y |
| Item Name | Cap,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Twc-Thevalve Company |
| Status | ACTIVE |
| Valve Type for Which Designed | ANGLE |
| Outside Diameter | 9.250 INCHES NOMINAL IN |
| Valve Size for Which Designed | 4.000 INCHES IN |
| Height | 8.062 INCHES NOMINAL IN |
| Material | STEEL |
| Attachment Method | BOLTS |
| 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 |
|---|---|
| N11263-1 ITEM 2 | Twc-Thevalve Company (USA) |
| 7877-2-Y | Pioneer Industries, Llc (USA) |
| 7877-2-Y PRIMARY | Twc-Thevalve Company (USA) |
| Reference | Meaning |
|---|---|
| N-11263-1 ITEM 2 | 5/9 Secondary reference U.S. Government activity |
| N-11263-1 | D/9 Drawing number reference only U.S. Government activity |
| N-11263-1 PIECE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 7877-2-Y | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-110-7651 is a Cap,valve, manufactured by Twc-Thevalve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-110-7651 has 3 manufacturer part numbers on file: N11263-1 ITEM 2 (Twc-Thevalve Company), 7877-2-Y (Pioneer Industries, Llc), 7877-2-Y (Twc-Thevalve Company).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-110-7679. Verify interchangeability with system specifications before substitution.
Key specifications for 7877-2-Y: Valve Type for Which Designed: ANGLE; Outside Diameter: 9.250 INCHES NOMINAL IN; Valve Size for Which Designed: 4.000 INCHES IN; Height: 8.062 INCHES NOMINAL IN. 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.