The Ring,rod,piston, cataloged under National Stock Number 3040-01-394-8347, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Trelleborg Sealing Solutions Us, Inc.. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-394-8347 |
| Primary Part Number | 31W02750-46-1/2 |
| Item Name | Ring,rod,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Trelleborg Sealing Solutions Us, Inc. |
| Status | ACTIVE |
| Cross-Sectional Shape Style | CONVEX FACECONVEX FACE |
| Joint Style | VERTICAL/DIAGONAL JOINTVERTICAL/DIAGONAL JOINT |
| Oil Passage Type and Quantity | 1 GROOVE TOP |
| 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 |
|---|---|
| 31W02750-46-1/2 PRIMARY | Trelleborg Sealing Solutions Us, Inc. (USA) |
| N-2-3-34 | Bird-Johnson Propeller Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 31W02750-46-1/2 | 5/9 Secondary reference Bird-Johnson Propeller Company, Llc |
NSN 3040-01-394-8347 is a Ring,rod,piston, manufactured by Trelleborg Sealing Solutions Us, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-394-8347 has 2 manufacturer part numbers on file: 31W02750-46-1/2 (Trelleborg Sealing Solutions Us, Inc.), N-2-3-34 (Bird-Johnson Propeller Company, Llc).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-468-5419. Verify interchangeability with system specifications before substitution.
Key specifications for 31W02750-46-1/2: Cross-Sectional Shape Style: CONVEX FACECONVEX FACE; Joint Style: VERTICAL/DIAGONAL JOINTVERTICAL/DIAGONAL JOINT; Oil Passage Type and Quantity: 1 GROOVE TOP; Special Features: BEARING ROD TYPE W IS MADE OUT OF A RING MACHINED CUT TO A 45 DEGREE ANGLE FOR THE ROD DIA.; ROD DIA. 2.750 INS.; ROD BORE DIA. 2.772 INS.; GROOVE DIA. 3.006 INS.; MATERIAL IS TURCITE 46. 3 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.