The Seat,valve, cataloged under National Stock Number 4820-00-976-4736, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Euramco Safety Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-976-4736 |
| Primary Part Number | 35739000633 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Euramco Safety Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.470 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN |
| Flange Diameter | 1.061 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN |
| Thread Length | 0.337 INCHES MINIMUM AND 0.342 INCHES MAXIMUM SINGLE THREADED PORTION IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM BODY |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM FACE |
| Style Designator | THREADED FLANGED |
| Material Document and Classification | QQ-S-763,CLASS 420 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Nominal Thread Size | 0.625 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.337 INCHES MINIMUM AND 0.342 INCHES MAXIMUM IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 7.500 NOMINAL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| 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 |
|---|---|
| 35739000633 | Euramco Safety Inc (USA) |
| Reference | Meaning |
|---|---|
| 633NF7054 | 5/9 Secondary reference U.S. Government activity |
| NF-7054 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 717037 | 5/9 Secondary reference U.S. Government activity |
| NF7054 | D/9 Drawing number reference only U.S. Government activity |
| NF-7054PIECE633 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 717037 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| NF7054PC633 | 5/9 Secondary reference U.S. Government activity |
| NF-7054 PC 633 | 5/9 Secondary reference Lowe Charles M Co the |
| 717037 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
NSN 4820-00-976-4736 is a Seat,valve, manufactured by Euramco Safety Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-976-4736 has 1 manufacturer part number on file: 35739000633 (Euramco Safety Inc).
Key specifications for 35739000633: Flange Seat to Disk End Height: 0.470 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN; Flange Diameter: 1.061 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN; Thread Length: 0.337 INCHES MINIMUM AND 0.342 INCHES MAXIMUM SINGLE THREADED PORTION IN; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM BODY. 15 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.