The Shaft,shouldered, cataloged under National Stock Number 3040-01-481-2251, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Bath Iron Works Corporation. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-481-2251 |
| Primary Part Number | 8100-1253-0238 PT NO 571 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Bath Iron Works Corporation |
| Status | ACTIVE |
| Step Quantity | 4 |
| First End Diameter | 0.7500 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 1.4219 INCHES NOMINAL IN |
| Second End Diameter | 1.1230 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.1230 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM IN |
| First End External Thread Length | 0.6880 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Material Document and Classification | SAE-AMS-QQ-S-763 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.1250 INCHES NOMINAL IN |
| Second End Distance From Hole Center to End | 0.6250 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.6880 INCHES NOMINAL IN |
| First End Groove Diameter | 0.5938 INCHES NOMINAL IN |
| Second End Style | PLAIN |
| Material | STEEL CORROSION RESISTING |
| First End Groove Width | 0.0938 INCHES NOMINAL IN |
| Second End Distance Between Hole Centers | 7.2500 INCHES NOMINAL IN |
| First End Distance From Hole Center to End | 0.3438 INCHES NOMINAL IN |
| External Keyway Length | 0.8438 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.2500 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 8100-1253-0238 PT NO 571 PRIMARY | Bath Iron Works Corporation (USA) |
| Reference | Meaning |
|---|---|
| 8100-1253-0238 | D/9 Drawing number reference only Bath Iron Works Corporation |
NSN 3040-01-481-2251 is a Shaft,shouldered, manufactured by Bath Iron Works Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-481-2251 has 1 manufacturer part number on file: 8100-1253-0238 PT NO 571 (Bath Iron Works Corporation).
Key specifications for 8100-1253-0238 PT NO 571: Step Quantity: 4; First End Diameter: 0.7500 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 1.4219 INCHES NOMINAL IN; Second End Diameter: 1.1230 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM IN. 20 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.