The Valve,ball, cataloged under National Stock Number 4820-01-193-4676, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-193-4676 |
| Primary Part Number | 4687589 ASSYA |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 4.438 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 4.438 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 4.750 INCHES THIRD END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | CROSS |
| Bolt Hole Nominal Diameter | 0.690 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.750 INCHES THIRD END IN |
| Bolt Hole Nominal Diameter | 0.690 INCHES FIRST END IN |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Outside Diameter | 5.560 INCHES FIRST END IN |
| Nominal Outside Diameter | 5.560 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.380 INCHES THIRD END IN |
| Bolt Hole Quantity | 6 FIRST END |
| Bolt Hole Quantity | 6 SECOND END |
| Bolt Hole Quantity | 5 THIRD END |
| Material | BRONZE BODY |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.812 INCHES ALL ENDS IN |
| 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 |
|---|---|
| 4687589 ASSYA PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 2642-926-01 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 2642-926-01 | D/9 Drawing number reference only U.S. Government activity |
| 2642-926-01 ASSYA | 5/9 Secondary reference U.S. Government activity |
| 845-4687589 ASSYA | 3/2 Design control — primary reference U.S. Government activity |
| 845-4687589 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-193-4676 is a Valve,ball, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-193-4676 has 2 manufacturer part numbers on file: 4687589 ASSYA (Derbyshire Machine & Tool Co), 2642-926-01 (Derbyshire Machine & Tool Co).
Key specifications for 4687589 ASSYA: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 4.438 INCHES FIRST END IN; Bolt Circle Nominal Diameter: 4.438 INCHES SECOND END IN. 20 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.