The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-690-3230, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 9 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-690-3230 |
| Primary Part Number | N-37087REVE |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Style Designator | FLAT |
| Material Thickness | 0.106 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 3.125 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 3.125 INCHES NOMINAL IN |
| Center Hole Diameter | 0.462 INCHES NOMINAL IN |
| Outside Corner Radius | 0.500 INCHES NOMINAL IN |
| Material | RUBBER FABRIC REINFORCED |
| Hole Diameter | 0.475 INCHES NOMINAL IN |
| 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 |
|---|---|
| UL83-33A | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| N-37087REVE PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| UL83-33A | 5/9 Secondary reference U.S. Government activity |
| N-37087REVE | 5/9 Secondary reference U.S. Government activity |
| N-37087REVE | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| N-37087REVE | 5/9 Secondary reference Ingersoll Rand Co |
| UL83-33A | 5/9 Secondary reference Ingersoll Rand Co |
| UL83-33A | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4820-00-690-3230 is a Diaphragm,valve,flat, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-690-3230 has 2 manufacturer part numbers on file: UL83-33A (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), N-37087REVE (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for N-37087REVE: Style Designator: FLAT; Overall Length: 4.250 INCHES NOMINAL IN; Overall Width: 4.250 INCHES NOMINAL IN; Material Thickness: 0.106 INCHES NOMINAL IN. 9 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.