The Ring,piston, cataloged under National Stock Number 4310-00-945-7342, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Kaydon Ring & Seal Inc Dba Skf Precision Technologies. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4310-00-945-7342 |
| Primary Part Number | R36390 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Kaydon Ring & Seal Inc Dba Skf Precision Technologies |
| Status | ACTIVE |
| Cross-Sectional Shape Style | BEVELED FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL |
| Joint Style | VERTICAL JOINT |
| Oil Passage Type and Quantity | 1 GROOVE OUTSIDE PERIPHERY |
| Oil Passage Type and Quantity | 9 HOLE HORIZONTALLY THROUGH RING |
| Radial Wall Thickness | 0.1740 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | PHOSPHATE OVERALL |
| Standard Bore Diameter | 4.500 INCHES IN |
| Material | IRON 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 |
|---|---|
| R36390 PRIMARY | Kaydon Ring & Seal Inc Dba Skf Precision Technologies (USA) |
| Reference | Meaning |
|---|---|
| 44805 | 7/9 Vendor item drawing reference Davey Compressor Co Div of Keco Industries Inc |
| 44805 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 44805 | 5/2 Secondary reference U.S. Government activity |
NSN 4310-00-945-7342 is a Ring,piston, manufactured by Kaydon Ring & Seal Inc Dba Skf Precision Technologies, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-945-7342 has 1 manufacturer part number on file: R36390 (Kaydon Ring & Seal Inc Dba Skf Precision Technologies).
2 possible matches (shared part number, not a government interchangeability claim): 5905-01-013-1420, 6340-01-699-9429. Verify interchangeability with system specifications before substitution.
Key specifications for R36390: Overall Width: 0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN; Cross-Sectional Shape Style: BEVELED FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL; Joint Style: VERTICAL JOINT; Oil Passage Type and Quantity: 1 GROOVE OUTSIDE PERIPHERY. 9 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.