The Ring Set,piston, cataloged under National Stock Number 4310-01-337-4531, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor. Government technical data includes 4 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-337-4531 |
| Primary Part Number | 4434-020 |
| Item Name | Ring Set,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor |
| Status | ACTIVE |
| Bore Diameter Oversize | 0.020 INCHES IN |
| Ring Set Component Parts | COMPRESSION RING 2584-020 49576 3; OIL RING 2645-020 49576 1 |
| Piston Accommodation Quantity | 1 |
| Standard Bore Diameter | 4.362 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4310-01-337-4531 is a Ring Set,piston, manufactured by Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-337-4531 has 2 manufacturer part numbers on file: 4434-020 (Lorenz Equipment Co the), 4434-020 (Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor).
Key specifications for 4434-020: Bore Diameter Oversize: 0.020 INCHES IN; Ring Set Component Parts: COMPRESSION RING 2584-020 49576 3; OIL RING 2645-020 49576 1; Piston Accommodation Quantity: 1; Standard Bore Diameter: 4.362 INCHES IN. 4 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.