The Ring,piston, cataloged under National Stock Number 2805-00-520-2266, 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 Aviarms Support Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-520-2266 |
| Primary Part Number | 61A107B55 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Aviarms Support Corp |
| Status | ACTIVE |
| FSC Application Data | RACK ASSEMBLY,BOMB EJECTOR,AIRCRAFT |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0410 INCHES MINIMUM AND 0.0460 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 1.000 INCHES IN |
| Material | IRON OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 61A107B55 PRIMARY | Aviarms Support Corp (USA) |
| Reference | Meaning |
|---|---|
| 5807A0 | 5/9 Secondary reference Kaydon Ring & Seal Inc Dba Skf Precision Technologies |
| 61A107B55 | 5/9 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 61A107B55 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 61A107B55 | 5/9 Secondary reference Giesting & Associates, Inc. |
NSN 2805-00-520-2266 is a Ring,piston, manufactured by Aviarms Support Corp, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-520-2266 has 1 manufacturer part number on file: 61A107B55 (Aviarms Support Corp).
Key specifications for 61A107B55: FSC Application Data: RACK ASSEMBLY,BOMB EJECTOR,AIRCRAFT; Overall Width: 0.1250 INCHES MINIMUM AND 0.1270 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT 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.
NSN 2805-00-520-2266 has DEMIL Code Q. 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.