The Ring,piston, cataloged under National Stock Number 4310-00-273-2822, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-273-2822 |
| Primary Part Number | 318692PC4 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| FSC Application Data | 5 IN. GUN MOUNTS IN |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | STEP JOINT |
| Radial Wall Thickness | 0.1000 INCHES MINIMUM AND 0.1100 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 2.375 INCHES IN |
| Material | IRON OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 39272 | Reidville Hydraulics & Mfg Inc (USA) |
| 318692PC4 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 39272 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| E39600-22PC4 | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 4310-00-273-2822 is a Ring,piston, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-273-2822 has 4 manufacturer part numbers on file: 39272 (Reidville Hydraulics & Mfg Inc), 318692PC4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 39272 (Eaton Aerospace, Llc Dba Jackson South), E39600-22PC4 (Eaton Aerospace, Llc Dba Jackson South).
4 possible matches (shared part number, not a government interchangeability claim): 5930-00-581-8277, 6680-01-081-7805, 5331-01-138-2484. Verify interchangeability with system specifications before substitution.
Key specifications for 318692PC4: FSC Application Data: 5 IN. GUN MOUNTS IN; Overall Width: 0.1240 INCHES NOMINAL IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Joint Style: STEP JOINT. 7 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.
NSN 4310-00-273-2822 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.