The Valve,ball, cataloged under National Stock Number 4820-01-654-5985, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gross Mechanical Laboratories Inc. Government technical data includes 14 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 | 4820-01-654-5985 |
| Primary Part Number | BV-1250 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Gross Mechanical Laboratories Inc |
| Status | ACTIVE |
| Flange Shape | TRIANGULAR WITH HOLES SECOND END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Bolt Circle Nominal Diameter | 3.62 INCHES SECOND END IN |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Bolt Hole Nominal Diameter | 0.34 INCHES SECOND END IN |
| Nominal Thread Size | 1.25 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 3 SECOND END |
| Face to Face Distance | 4.70 INCHES IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Material | STEEL STAINLESS - USE STB000 STEM |
| Material | STEEL STAINLESS - USE STB000 FLOW CONTROL DEVICE |
| Thread Series Designator | NPSM SECOND END |
| Thread Series Designator | NPT FIRST END |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| BV-1250 PRIMARY | Gross Mechanical Laboratories Inc (USA) |
NSN 4820-01-654-5985 is a Valve,ball, manufactured by Gross Mechanical Laboratories Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-654-5985 has 1 manufacturer part number on file: BV-1250 (Gross Mechanical Laboratories Inc).
Key specifications for BV-1250: Flange Shape: TRIANGULAR WITH HOLES SECOND END; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Bolt Circle Nominal Diameter: 3.62 INCHES SECOND END IN; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 14 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.