The Valve,check, cataloged under National Stock Number 4820-01-561-4147, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bosworth Co. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-561-4147 |
| Primary Part Number | 74-9 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bosworth Co |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (HOSE) ALL ENDS |
| Mounting Position | VERTICAL |
| Connection Type | UNTHREADED EXTERNAL HOSE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter | 1.125 INCHES ALL ENDS IN |
| Disk Loading Method | WEIGHT |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Material | PLASTIC ACETAL BODY |
| 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 |
|---|---|
| 74-9 PRIMARY | Bosworth Co (USA) |
NSN 4820-01-561-4147 is a Valve,check, manufactured by Bosworth Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-561-4147 has 1 manufacturer part number on file: 74-9 (Bosworth Co).
Key specifications for 74-9: Flow Control Device: DISK; Connection Style: PLAIN (HOSE) ALL ENDS; Mounting Position: VERTICAL; Connection Type: UNTHREADED EXTERNAL HOSE ALL ENDS. 10 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.