The Ring,piston, cataloged under National Stock Number 4310-01-181-8499, 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 Div Epd. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-181-8499 |
| Primary Part Number | 388D323AX1 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Material | NICKEL ALLOY 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 |
|---|---|
| KMC-11192-D-18 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| 388D323AX1 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| PL-11256-F-18 | D/9 Drawing number reference only U.S. Government activity |
| 388D323AX1 | 3/9 Design control — primary reference U.S. Government activity |
| PL-11256-F-18 ITEM 323 | 5/9 Secondary reference U.S. Government activity |
| D-388D323AX1 | 5/9 Secondary reference U.S. Government activity |
| D-388D323AX2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4310-01-181-8499 is a Ring,piston, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-181-8499 has 2 manufacturer part numbers on file: KMC-11192-D-18 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp), 388D323AX1 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-182-0971. Verify interchangeability with system specifications before substitution.
Key specifications for 388D323AX1: Material: NICKEL ALLOY OVERALL. 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.