The Shaft Drive, cataloged under National Stock Number 2520-00-753-9802, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-753-9802 |
| Primary Part Number | 7539802 |
| Item Name | Shaft Drive |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL 50D-146F OR 4.500 DIA TIMES5 SAE,4620ST WGT 3.0 OR AISI 94B17 OR SAE 8620,4.687 IN. L,END OF SHAFT 1.3779 IN. DIA W FOR 0.729 IN. L,1.625IN. DIA W FOR 0.093 IN. L,4.450 IN. DIA W FOR 0.500 IN. L,CENTER 0.872 IN.DIA L,WITH 34 TEETH,DIA PITCH 8-10,PRESSURE ANGLE 20 DEGREES,PITCH DIA 4.250,OUTSIDE DIA 4.450,BACKLASH 0.006M 0.010 WITH MATE,CIRCULAR TOOTH THICK0.1933 M 0.0020,DIM OVER 2 0.216 DIA,PINS 4.5445 M 0.0049,CROWN SHAVE 0.0025 MAX,1.250 IN. DIA W FOR 0.906 IN. L IN CONTINUE OF SHAFT,1.093 IN. SPLINE STRAIGHT,0.437 IN. L WITH OUTSIDE DIA OF 0.586 WITH 32 THREADS PER INCH,CASE HARDEN TEETH TO DEPTH OF0.025 TO 0.035 ROCKWELL C 60 MIN,GROUND DIAS TO BE CONCENTRIC WITHIN 0.0005 TOTAL INDICATOR READING,10 SPLINE-CLASS PERMANET FIT,CENTERS TO REMAIN IN ENDS OF SHAFT,SHAFT HARDNESSTO BE ROCKWELL C 20-27 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 |
|---|---|
| 7539802 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 50D146 | 5/9 Secondary reference U.S. Government activity |
| 50D146 | 5/9 Secondary reference Spalla Inc |
NSN 2520-00-753-9802 is a Shaft Drive, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-753-9802 has 1 manufacturer part number on file: 7539802 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7539802: General Characteristics Item Description: STEEL 50D-146F OR 4.500 DIA TIMES5 SAE,4620ST WGT 3.0 OR AISI 94B17 OR SAE 8620,4.687 IN. L,END OF SHAFT 1.3779 IN. DIA W FOR 0.729 IN. L,1.625IN. DIA W FOR 0.093 IN. L,4.450 IN. DIA W FOR 0.500 IN. L,CENTER 0.872 IN.DIA L,WITH 34 TEETH,DIA PITCH 8-10,PRESSURE ANGLE 20 DEGREES,PITCH DIA 4.250,OUTSIDE DIA 4.450,BACKLASH 0.006M 0.010 WITH MATE,CIRCULAR TOOTH THICK0.1933 M 0.0020,DIM OVER 2 0.216 DIA,PINS 4.5445 M 0.0049,CROWN SHAVE 0.0025 MAX,1.250 IN. DIA W FOR 0.906 IN. L IN CONTINUE OF SHAFT,1.093 IN. SPLINE STRAIGHT,0.437 IN. L WITH OUTSIDE DIA OF 0.586 WITH 32 THREADS PER INCH,CASE HARDEN TEETH TO DEPTH OF0.025 TO 0.035 ROCKWELL C 60 MIN,GROUND DIAS TO BE CONCENTRIC WITHIN 0.0005 TOTAL INDICATOR READING,10 SPLINE-CLASS PERMANET FIT,CENTERS TO REMAIN IN ENDS OF SHAFT,SHAFT HARDNESSTO BE ROCKWELL C 20-27 IN; End Item Identification: 2520-00-753-9802. 1 specification is 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.