The Valve,ball and Chec, cataloged under National Stock Number 4820-01-102-9484, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-102-9484 |
| Primary Part Number | 4558779 ASSYA |
| Item Name | Valve,ball and Chec |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 4558779 ASSYA PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 4558779-A-M1 | 5/2 Secondary reference U.S. Government activity |
| 845-4558779AASS | 5/9 Secondary reference U.S. Government activity |
| 2642-822-10 ASSYA | 5/2 Secondary reference U.S. Government activity |
| 2642-822-10 ASSYA | 5/9 Secondary reference Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
| 845-4558779 ASSYA | 3/2 Design control — primary reference U.S. Government activity |
| 2642-822-10ASSY | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-102-9484 is a Valve,ball and Chec, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-102-9484 has 1 manufacturer part number on file: 4558779 ASSYA (Derbyshire Machine & Tool Co).
Key specifications for 4558779 ASSYA: End Item Identification: 4.0IPS 700PSI BTWLD CUNI. 0 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.