The Ring,piston, cataloged under National Stock Number 4310-00-169-0771, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Bae Systems Global Combat Systems Limited. Government technical data includes 10 specifications, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-169-0771 |
| Primary Part Number | D5E9219-161 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Bae Systems Global Combat Systems Limited |
| Status | ACTIVE |
| FSC Application Data | MACHINE GUN,30MM MM |
| Surface Treatment Document and Classification | DEF 29 CLASS 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | DTD239A MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | DOUBLE INSIDE BEVEL, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0720 INCHES MINIMUM AND 0.0770 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | PHOSPHATE OVERALL |
| Standard Bore Diameter | 2.152 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 |
|---|---|
| D5E9219-161 PRIMARY | Bae Systems Global Combat Systems Limited (GBR) |
| 7R9641065 | Bae Systems Global Combat Systems Limited (GBR) |
| 7R56 | Bae Systems Global Combat Systems Limited (GBR) |
NSN 4310-00-169-0771 is a Ring,piston, manufactured by Bae Systems Global Combat Systems Limited, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-169-0771 has 3 manufacturer part numbers on file: D5E9219-161 (Bae Systems Global Combat Systems Limited), 7R9641065 (Bae Systems Global Combat Systems Limited), 7R56 (Bae Systems Global Combat Systems Limited).
Key specifications for D5E9219-161: FSC Application Data: MACHINE GUN,30MM MM; Surface Treatment Document and Classification: DEF 29 CLASS 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Width: 0.1160 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN; Material Document and Classification: DTD239A MFR REF SINGLE MATERIAL RESPONSE OVERALL. 10 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.