The Valve,check, cataloged under National Stock Number 4820-01-261-0158, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-261-0158 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Bolt Circle Nominal Diameter | 42.625 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 1.312 INCHES ALL ENDS IN |
| Valve Size | 38.000 INCHES IN |
| Nominal Outside Diameter | 46.125 INCHES ALL ENDS IN |
| Mounting Facility | THREADED FASTENER |
| Bolt Hole Quantity | 36 ALL ENDS |
| Face to Face Distance | 20.500 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| CVA632091682270 ASSY 98 | 3/2 Design control — primary reference U.S. Government activity |
| CVA63-209-1682270 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-261-0158 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-261-0158: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Bolt Circle Nominal Diameter: 42.625 INCHES ALL ENDS IN; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 13 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.