The Ring,piston, cataloged under National Stock Number 2810-00-478-8754, is classified within Federal Supply Class 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components) of the Engines, Turbines, and Components group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-478-8754 |
| Item Name | Ring,piston |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Status | ACTIVE |
| FSC Application Data | ENGINE,AIRCRAFT,RECIPROCATING |
| Bore Diameter Oversize | 0.015 INCHES IN |
| Cross-Sectional Shape Style | STRAIGHT 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 SLOT HORIZONTALLY THROUGH RING |
| Radial Wall Thickness | 0.1550 INCHES MINIMUM AND 0.1650 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | TIN OVERALL |
| Standard Bore Diameter | 4.077 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 |
| Reference | Meaning |
|---|---|
| 530677P15 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
NSN 2810-00-478-8754 is a Ring,piston, classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
Key specifications for 2810-00-478-8754: FSC Application Data: ENGINE,AIRCRAFT,RECIPROCATING; Bore Diameter Oversize: 0.015 INCHES IN; Overall Width: 0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN; Cross-Sectional Shape Style: STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL. 11 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.