The Knuckle,towbar, cataloged under National Stock Number 2530-00-040-2880, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-00-040-2880 |
| Primary Part Number | 8343503 |
| Item Name | Knuckle,towbar |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | WELDED 3 PIECE CONSTRUCTION,1ST END DATA,STEEL BALL,MATERIAL,QQ-S-634,COMP 1010-1025,2.688 IN. DIA 2ND END DATA,INTERNALLY THD,1-1/2-4 SQUARE THD,3.000 IN. THD LG,THD INSERT MATERIAL,STEEL,QQ-S-634,COMP 1015-1025,3.482 IN. OD,CENTER SECTION DATA,STEEL TUBE,MATERIAL,QQ-T-830,COMP MT1010 TO MTX1020,3.250 IN. OD,0.250 IN. WALL THK,14.812 IN. LG,W/EXTERNAL KEYWAY,0.484 IN. W,0.125 IN. H,14.812 IN. LG,2 UNTHD HOLES 0.875 IN. DIA,180 DEG APART,90 DEG FROM KEYWAY,1.875 IN. FROM THD END,1 UNTHD HOLE 0.498 IN. DIA IN KEYWAY,4.000 IN. FROM THD END,18.531 IN. O/A LG 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 |
|---|---|
| 8343503 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| C2087 | 5/9 Secondary reference Homan J and E Co Inc |
NSN 2530-00-040-2880 is a Knuckle,towbar, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-040-2880 has 1 manufacturer part number on file: 8343503 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8343503: General Characteristics Item Description: WELDED 3 PIECE CONSTRUCTION,1ST END DATA,STEEL BALL,MATERIAL,QQ-S-634,COMP 1010-1025,2.688 IN. DIA 2ND END DATA,INTERNALLY THD,1-1/2-4 SQUARE THD,3.000 IN. THD LG,THD INSERT MATERIAL,STEEL,QQ-S-634,COMP 1015-1025,3.482 IN. OD,CENTER SECTION DATA,STEEL TUBE,MATERIAL,QQ-T-830,COMP MT1010 TO MTX1020,3.250 IN. OD,0.250 IN. WALL THK,14.812 IN. LG,W/EXTERNAL KEYWAY,0.484 IN. W,0.125 IN. H,14.812 IN. LG,2 UNTHD HOLES 0.875 IN. DIA,180 DEG APART,90 DEG FROM KEYWAY,1.875 IN. FROM THD END,1 UNTHD HOLE 0.498 IN. DIA IN KEYWAY,4.000 IN. FROM THD END,18.531 IN. O/A LG IN. 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.