The Ring,piston, cataloged under National Stock Number 3040-01-462-5833, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-462-5833 |
| Primary Part Number | 74A410855-2003 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Material Document and Classification | AMS 4535 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | DIAGONAL JOINT |
| Radial Wall Thickness | 0.2150 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 4.120 INCHES AND 4.370 INCHES IN |
| Material | COPPER ALLOY 172 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 |
|---|---|
| 74A410855-2003 | Israel Aerospace Industries Ltd.shl-Aero Assemblies Division (ISR) |
| 74A410855-2003 | Safran Landing Systems Canada Inc. (CAN) |
| 74A410855-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| 74A410855-2003 | Nassau Tool Works, Inc (USA) |
| 74A410855-2003 | Blair Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 74A410855-2003 | 5/2 Secondary reference U.S. Government activity |
| 74A410855-2003 | 5/9 Secondary reference Israel Aerospace Industries Ltd. Shl - Aero Assemblies Division |
| 74A410855-2003 | 5/9 Secondary reference Circor Aerospace, Inc. Dba Circor Aerospace Machining Center |
| 74A410855-2003 | C/1 Advisory reference — outside the item-of-supply concept Circor Aerospace, Inc. Div Circor |
| 10412373 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A410855-2003 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
NSN 3040-01-462-5833 is a Ring,piston, manufactured by The Boeing Company Div Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-462-5833 has 5 manufacturer part numbers on file: 74A410855-2003 (Israel Aerospace Industries Ltd.shl-Aero Assemblies Division), 74A410855-2003 (Safran Landing Systems Canada Inc.), 74A410855-2003 (The Boeing Company Div Defense), 74A410855-2003 (Nassau Tool Works, Inc), 74A410855-2003 (Blair Industries Inc).
Key specifications for 74A410855-2003: Overall Width: 1.8800 INCHES NOMINAL IN; Material Document and Classification: AMS 4535 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Joint Style: DIAGONAL 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 3040-01-462-5833 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.