The Shaft,axle,automotive, cataloged under National Stock Number 2520-00-734-0403, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Mack Trucks Inc Parts Opn. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-734-0403 |
| Primary Part Number | 37KM28P1 |
| Item Name | Shaft,axle,automotive |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Mack Trucks Inc Parts Opn |
| Status | ACTIVE |
| Second End Type | SPLINED |
| First End Type | SPLINED |
| First End Spline Major Diameter | 2.162 INCHES MINIMUM AND 2.168 INCHES MAXIMUM IN |
| Second End Spline Quantity | 17 |
| Second End Spline Minor Diameter | 1.545 INCHES NOMINAL IN |
| Second End Bearing Seat | NOT INCLUDED |
| Second End Spline Major Diameter | 1.749 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| First End Spline Quantity | 12 |
| Material Document and Classification | QQ-S-624, FS4150H-CANCELED FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 1.688 INCHES NOMINAL IN |
| First End Spline Type | STRAIGHT |
| Second End Spline Type | STRAIGHT |
| First End Spline Minor Diameter | 1.872 INCHES MINIMUM AND 1.878 INCHES MAXIMUM IN |
| Material | STEEL COMP 4150 |
| First End Bearing Seat | NOT INCLUDED |
| Metallic Hardness Rating | 42.0 MINIMUM ROCKWELL C AND 45.0 MAXIMUM ROCKWELL C |
| Second End Spline Length | 2.063 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 37KM28P1 PRIMARY | Mack Trucks Inc Parts Opn (USA) |
| 7340403 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 37KM28AP1 | 5/9 Secondary reference Mack Trucks Inc Parts Opn |
| 37KM28A | 5/9 Secondary reference Mack Trucks, Inc. Dba Volvo Powertrain North America Div Hagerstown Powertrain Operations |
NSN 2520-00-734-0403 is a Shaft,axle,automotive, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-734-0403 has 2 manufacturer part numbers on file: 37KM28P1 (Mack Trucks Inc Parts Opn), 7340403 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 37KM28P1: Second End Type: SPLINED; First End Type: SPLINED; First End Spline Major Diameter: 2.162 INCHES MINIMUM AND 2.168 INCHES MAXIMUM IN; Second End Spline Quantity: 17. 17 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.