The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-00-974-9533, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Meritor Heavy Vehicle Systems, Llc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-974-9533 |
| Primary Part Number | 20X863 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Head Height | 0.320 INCHES NOMINAL IN |
| Fastener Length | 3.680 INCHES NOMINAL IN |
| Shoulder Length | 0.750 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Length | 0.500 INCHES NOMINAL SECOND SHOULDER IN |
| Distance From Largest Diameter of Bearing Surface of Head to Ribs | 0.750 INCHES NOMINAL IN |
| Shoulder Diameter | 1.020 INCHES MINIMUM AND 1.025 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 1.037 INCHES MINIMUM AND 1.047 INCHES MAXIMUM SECOND SHOULDER IN |
| Thread Length | 1.560 INCHES NOMINAL IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Rib Length | 0.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.938 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | LEFT-HAND |
| Rib Major Diameter | 1.037 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN |
| Nonstandard Thread Pitch Diameter | +0.8780 TO 0.8830 INCHES IN |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNS |
| Rib Quantity | 50 |
| Head Diameter | 1.380 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 |
NSN 5306-00-974-9533 is a Bolt,ribbed Shoulder, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-974-9533 has 3 manufacturer part numbers on file: 20X863 (Meritor Industrial Products, Llc), FR25087-3 (Eagle Crusher Co Inc Dba Stedman Machine Co), 20X863 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for 20X863: Head Height: 0.320 INCHES NOMINAL IN; Fastener Length: 3.680 INCHES NOMINAL IN; Shoulder Length: 0.750 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Length: 0.500 INCHES NOMINAL SECOND SHOULDER 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.