The Kingpin,fifth Wheel, cataloged under National Stock Number 2510-00-321-6482, is classified within Federal Supply Class 2510 (Vehicular Cab, Body, and Frame Structural Components) of the Vehicular Equipment Components group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2510-00-321-6482 |
| Item Name | Kingpin,fifth Wheel |
| FSC / FSG | 2510 / 25 — Vehicular Cab, Body, and Frame Structural Components |
| Status | ACTIVE |
| Shank Diameter | 5.250 INCHES NOMINAL IN |
| Head Height | 1.000 INCHES NOMINAL IN |
| Thread Length | 1.500 INCHES NOMINAL IN |
| Shank Length | 1.250 INCHES NOMINAL IN |
| Style Designator | THREADED |
| Material Document and Classification | ASTMA27 ASSN STD 1ST MATERIAL RESPONSE AND ASTMA148 ASSN STD 2ND MATERIAL RESPONSE |
| Locking Recess Outside Diameter | 6.250 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Locking Recess Length | 0.625 INCHES NOMINAL IN |
| Thread Size | 5.250 |
| Thread Class | 2A A |
| Bore Diameter | 4.495 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN |
| Head Outside Diameter | 12.000 INCHES NOMINAL IN |
| Material | STEEL |
| Pin Length | 3.625 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS53040-1 | 2/2 Government specification standardization U.S. Government activity |
| MS53040 | 4/1 Identification reference U.S. Government activity |
| 11R53 | C/1 Advisory reference — outside the item-of-supply concept Minnpar, Llc Dba Minnpar |
| 11R53 | 5/9 Secondary reference Barber-Greene Co |
| 8903-1-2 | 5/1 Secondary reference U.S. Government activity |
NSN 2510-00-321-6482 is a Kingpin,fifth Wheel, classified under FSC 2510, Vehicular Cab, Body, and Frame Structural Components. Status: active.
Key specifications for 2510-00-321-6482: Shank Diameter: 5.250 INCHES NOMINAL IN; Head Height: 1.000 INCHES NOMINAL IN; Thread Length: 1.500 INCHES NOMINAL IN; Shank Length: 1.250 INCHES NOMINAL IN. 15 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.