The Ring,piston, cataloged under National Stock Number 4310-00-929-5644, 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 Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 6 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-929-5644 |
| Primary Part Number | X1440T54M |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Cross-Sectional Shape Style | TWO PIECE SCRAPER, BEVELED FACE, W/EXPANDER AND RESTRAINER |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1875 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 3.500 INCHES IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| X1440T54M PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| R63136M350 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| X1440T54M | C/1 Advisory reference — outside the item-of-supply concept Ingersoll-Rand Company Dba Ingersoll-Rand |
| X1440T54M | 5/9 Secondary reference U.S. Government activity |
| X1440T54M | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| X1440T54M | 5/9 Secondary reference Ingersoll Rand Co |
| X1440T54M | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4310-00-929-5644 is a Ring,piston, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-929-5644 has 2 manufacturer part numbers on file: X1440T54M (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), R63136M350 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for X1440T54M: Overall Width: 0.1865 INCHES MAXIMUM IN; Cross-Sectional Shape Style: TWO PIECE SCRAPER, BEVELED FACE, W/EXPANDER AND RESTRAINER; Joint Style: VERTICAL JOINT; Radial Wall Thickness: 0.1875 INCHES NOMINAL IN. 6 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.