The Valve,check, cataloged under National Stock Number 4820-01-231-6640, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bonney Forge Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-231-6640 |
| Primary Part Number | HL-61-THRD 1.50 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bonney Forge Corp |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 1.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material | STEEL UNS K03504 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 |
|---|---|
| HL-61-THRD 1.50 PRIMARY | Bonney Forge Corp (USA) |
| HL-61-SW 1-1/2I PRIMARY | Bonney Forge Corp (USA) |
| Reference | Meaning |
|---|---|
| HL-61-THRD 1.50 | 5/9 Secondary reference Bonney Forge Corp |
| HL-61-SW 1-1/2IN | 5/9 Secondary reference Bonney Forge Corp |
| HL-61-THRD 1.50 | 5/9 Secondary reference Bonney Forge Valve |
| HL-61-SW 1-1/2I | 5/9 Secondary reference Bonney Forge Valve |
NSN 4820-01-231-6640 is a Valve,check, manufactured by Bonney Forge Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-231-6640 has 2 manufacturer part numbers on file: HL-61-THRD 1.50 (Bonney Forge Corp), HL-61-SW 1-1/2I (Bonney Forge Corp).
Key specifications for HL-61-THRD 1.50: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 1.500 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 9 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.