The Plate,stop,inlet Valve, cataloged under National Stock Number 4310-00-423-2999, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors 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 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4310-00-423-2999 |
| Primary Part Number | 40CS5 |
| Item Name | Plate,stop,inlet Valve |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,4.750 IN. DIA,4.375 IN. DIA RECESSED FACE,0.125 IN. THD HOLES 2 PLACES,SIX OPENING SLOTS BOTH SIDES,TWO MTG SCREWS 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 |
|---|---|
| 1R150-200S76 | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 40CS5 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| W1540PP | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 1R150-200S76 | 5/9 Secondary reference Ingersoll Rand Co |
| 40CS5 | 5/9 Secondary reference Ingersoll Rand Co |
| 1R150-200S76 | 5/9 Secondary reference U.S. Government activity |
| 40CS5 | 5/9 Secondary reference U.S. Government activity |
| W1540PP | 5/9 Secondary reference Ingersoll Rand Co |
| W1540PP | 5/9 Secondary reference U.S. Government activity |
| W1540PP | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 1R150-200S76 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 40CS5 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4310-00-423-2999 is a Plate,stop,inlet Valve, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-423-2999 has 3 manufacturer part numbers on file: 1R150-200S76 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 40CS5 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), W1540PP (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for 40CS5: General Characteristics Item Description: STEEL,4.750 IN. DIA,4.375 IN. DIA RECESSED FACE,0.125 IN. THD HOLES 2 PLACES,SIX OPENING SLOTS BOTH SIDES,TWO MTG SCREWS IN. 1 specification is 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.