The Disk,valve, cataloged under National Stock Number 4820-01-649-8164, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tork Systems Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Tork Systems Inc (CAGE 6VBX1); W & O Supply Inc (CAGE 1QP40) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-649-8164 |
| Primary Part Number | 102-37904-21 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tork Systems Inc |
| 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 |
|---|---|
| 102-37904-21 | Tork Systems Inc (USA) |
| 102-37904-21 | W & O Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| 102-37904-D5 | 5/9 Secondary reference Mcc Holdings, Inc. Dba Crane Valve North America Div Crane Chempharma & Energy |
| 10JG57731X | D/9 Drawing number reference only Mcc Holdings, Inc. Dba Crane Valve North America Div Crane Chempharma & Energy |
| 102-37904-21 | 3/9 Design control — primary reference Mcc Holdings, Inc. Dba Crane Valve North America Div Crane Chempharma & Energy |
NSN 4820-01-649-8164 is a Disk,valve, manufactured by Tork Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-649-8164 has 2 manufacturer part numbers on file: 102-37904-21 (Tork Systems Inc), 102-37904-21 (W & O Supply Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-651-1783. Verify interchangeability with system specifications before substitution.
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.