The Disk,valve, cataloged under National Stock Number 4820-00-974-7739, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-974-7739 |
| Primary Part Number | 18-3-190 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Outside Diameter | 0.950 INCHES MINIMUM AND 1.012 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.500 INCHES IN |
| Thread Class | 2B |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| C3295S | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 18-3-190 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| 18-3-190 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| C3295S | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 18-3.190 | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-00-974-7739 is a Disk,valve, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-974-7739 has 2 manufacturer part numbers on file: C3295S (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 18-3-190 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
Key specifications for 18-3-190: Overall Height: 1.386 INCHES NOMINAL IN; Outside Diameter: 0.950 INCHES MINIMUM AND 1.012 INCHES MAXIMUM IN; Nominal Thread Size: 0.500 INCHES IN; Thread Class: 2B. 5 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.