The Ring,piston, cataloged under National Stock Number 3040-01-019-7423, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Mersen Usa Ptt Corp Dba Mersen Usa - Salem Branch Div Mersen Usa Bn Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-019-7423 |
| Primary Part Number | M2SA18 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Mersen Usa Ptt Corp Dba Mersen Usa - Salem Branch Div Mersen Usa Bn Corp |
| Status | ACTIVE |
| FSC Application Data | DRIVE,CONSTANT SPEED,MECHANICAL,AIRCRAFT |
| Material Document and Classification | CC170 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.0500 INCHES MINIMUM AND 0.0510 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 0.442 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 |
|---|---|
| M2SA18 PRIMARY | Mersen Usa Ptt Corp Dba Mersen Usa - Salem Branch Div Mersen Usa Bn Corp (USA) |
| Reference | Meaning |
|---|---|
| 27080-16 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 3040-01-019-7423 is a Ring,piston, manufactured by Mersen Usa Ptt Corp Dba Mersen Usa - Salem Branch Div Mersen Usa Bn Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-019-7423 has 1 manufacturer part number on file: M2SA18 (Mersen Usa Ptt Corp Dba Mersen Usa - Salem Branch Div Mersen Usa Bn Corp).
Key specifications for M2SA18: FSC Application Data: DRIVE,CONSTANT SPEED,MECHANICAL,AIRCRAFT; Overall Width: 0.0890 INCHES MINIMUM AND 0.0990 INCHES MAXIMUM IN; Material Document and Classification: CC170 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE. 8 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.