The Ring,piston, cataloged under National Stock Number 2810-00-618-5679, is classified within Federal Supply Class 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is United Ring & Seal, Inc. Government technical data includes 7 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 | 2810-00-618-5679 |
| Primary Part Number | 4RS14763748 |
| Item Name | Ring,piston |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Manufacturer | United Ring & Seal, Inc |
| Status | ACTIVE |
| FSC Application Data | ENGINE,AIRCRAFT,RECIPROCATING |
| Cross-Sectional Shape Style | DOUBLE INSIDE BEVEL, STRAIGHT RADII FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.2050 INCHES MINIMUM AND 0.2150 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 6.125 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 |
|---|---|
| URS147637Y8 | United Ring & Seal, Inc (USA) |
| 4RS14763748 PRIMARY | United Ring & Seal, Inc (USA) |
| 147637Y8 PRIMARY | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
NSN 2810-00-618-5679 is a Ring,piston, manufactured by United Ring & Seal, Inc, classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
NSN 2810-00-618-5679 has 3 manufacturer part numbers on file: URS147637Y8 (United Ring & Seal, Inc), 4RS14763748 (United Ring & Seal, Inc), 147637Y8 (Curtiss-Wright Controls, Inc. Div Actuation Division).
Key specifications for 4RS14763748: FSC Application Data: ENGINE,AIRCRAFT,RECIPROCATING; Overall Width: 0.1280 INCHES MINIMUM AND 0.1290 INCHES MAXIMUM IN; Cross-Sectional Shape Style: DOUBLE INSIDE BEVEL, STRAIGHT RADII FACE; Joint Style: VERTICAL 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.
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.