The Shaft,shouldered, cataloged under National Stock Number 3040-01-149-0243, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba. Government technical data includes 16 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-149-0243 |
| Primary Part Number | 90312-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba |
| Status | ACTIVE |
| Second End Hole Diameter | 0.1410 INCHES NOMINAL IN |
| Second End External Thread Length | 0.6250 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.5000 INCHES NOMINAL IN |
| Second End Diameter | 0.3750 INCHES NOMINAL IN |
| Largest Step Diameter | 0.500 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-S-633 COMP C FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.3100 INCHES NOMINAL IN |
| Second End Distance From Hole Center to End | 0.2188 INCHES NOMINAL IN |
| Second End Hole Depth | 0.3750 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.1250 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.6250 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED, CROSS DRILLED HOLE, AND EXTERNALLY THREADED |
| Material | STEEL COMP 1020 |
| 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 |
|---|---|
| 90312-1 PRIMARY | Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba (USA) |
NSN 3040-01-149-0243 is a Shaft,shouldered, manufactured by Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-149-0243 has 1 manufacturer part number on file: 90312-1 (Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba).
2 possible matches (shared part number, not a government interchangeability claim): 5120-01-361-8970, 5985-01-380-5001. Verify interchangeability with system specifications before substitution.
Key specifications for 90312-1: Second End Hole Diameter: 0.1410 INCHES NOMINAL IN; Second End External Thread Length: 0.6250 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.5000 INCHES NOMINAL IN. 16 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.