The Ring,piston, cataloged under National Stock Number 3040-00-555-4620, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Goodrich Corporation. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-555-4620 |
| Primary Part Number | 548134 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| FSC Application Data | SHOCK STRUT,LANDING GEAR,AIRCRAFT |
| Cross-Sectional Shape Style | DOUBLE INSIDE BEVEL, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1250 INCHES MINIMUM AND 0.1350 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 4.000 INCHES IN |
| Material | COPPER ALLOY 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 |
|---|---|
| 548134 PRIMARY | Goodrich Corporation (USA) |
| 548134 PRIMARY | United Aeronautical Corporation Dba United Aeronautical Corp (USA) |
| Reference | Meaning |
|---|---|
| 548134 | 5/9 Secondary reference Consolidated Aeronautics Corp |
| 548134 | 5/9 Secondary reference Goodrich Corp Dba Goodrich Corp |
NSN 3040-00-555-4620 is a Ring,piston, manufactured by Goodrich Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-555-4620 has 2 manufacturer part numbers on file: 548134 (Goodrich Corporation), 548134 (United Aeronautical Corporation Dba United Aeronautical Corp).
Key specifications for 548134: FSC Application Data: SHOCK STRUT,LANDING GEAR,AIRCRAFT; Overall Width: 0.1250 INCHES NOMINAL IN; Cross-Sectional Shape Style: DOUBLE INSIDE BEVEL, 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.
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.