The Seat,valve, cataloged under National Stock Number 4820-00-034-1691, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Volvo Construction Equipment North America, Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-034-1691 |
| Primary Part Number | 944934 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Volvo Construction Equipment North America, Llc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.160 INCHES NOMINAL IN |
| Flange Diameter | 0.802 INCHES MINIMUM AND 0.804 INCHES MAXIMUM IN |
| FSC Application Data | VALVE,POWER BRAKE |
| Body Outside Diameter | 0.580 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Under Flange Height | 0.990 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 0.750 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 944934 PRIMARY | Volvo Construction Equipment North America, Llc (USA) |
| Reference | Meaning |
|---|---|
| 610733 | 5/9 Secondary reference Bendix Corp the Bendix Aerospace Systems Div |
| 944934 | 5/9 Secondary reference Clark Equipment Co |
| 944934 | 5/9 Secondary reference U.S. Government activity |
| 944934 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| 610733 | 5/9 Secondary reference Bendix Corp the Brake and Steering Div |
NSN 4820-00-034-1691 is a Seat,valve, manufactured by Volvo Construction Equipment North America, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-034-1691 has 1 manufacturer part number on file: 944934 (Volvo Construction Equipment North America, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 2840-00-651-5797, 3120-00-661-8340. Verify interchangeability with system specifications before substitution.
Key specifications for 944934: Flange Seat to Disk End Height: 0.160 INCHES NOMINAL IN; Flange Diameter: 0.802 INCHES MINIMUM AND 0.804 INCHES MAXIMUM IN; FSC Application Data: VALVE,POWER BRAKE; Body Outside Diameter: 0.580 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN. 10 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.