The Ring,piston, cataloged under National Stock Number 2805-00-277-2964, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is John Reiner & Co. Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-277-2964 |
| Primary Part Number | T427A316 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | John Reiner & Co. Inc. |
| Status | ACTIVE |
| Material Document and Classification | 77220,72421 WS 85-2 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | CONVEX FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL |
| Joint Style | VERTICAL JOINT |
| Oil Passage Type and Quantity | 8 SLOT HORIZONTALLY THROUGH RING |
| Oil Passage Type and Quantity | 1 GROOVE INSIDE PERIPHERY |
| Radial Wall Thickness | 0.1790 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 4.312 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 |
|---|---|
| T427A316 | John Reiner & Co. Inc. (USA) |
| Reference | Meaning |
|---|---|
| T427A316 | 3/9 Design control — primary reference Teledyne Continental Motors Industrial Products Div Teledyne Industries Inc Sub of Teledyne Inc |
NSN 2805-00-277-2964 is a Ring,piston, manufactured by John Reiner & Co. Inc., classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-277-2964 has 1 manufacturer part number on file: T427A316 (John Reiner & Co. Inc.).
Key specifications for T427A316: Overall Width: 0.2485 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN; Material Document and Classification: 77220,72421 WS 85-2 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: CONVEX FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL; Joint Style: VERTICAL JOINT. 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.