The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-01-439-0282, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 22 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-439-0282 |
| Primary Part Number | 12448496-4 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.310 INCHES NOMINAL IN |
| Fastener Length | 3.160 INCHES NOMINAL IN |
| Shoulder Length | 1.290 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Length | 1.310 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | ASTMB633,TYII,CLASS FE/ZN 5 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Largest Diameter of Bearing Surface of Head to Ribs | 0.280 INCHES NOMINAL IN |
| Shoulder Diameter | 0.742 INCHES MINIMUM AND 0.750 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.971 INCHES MINIMUM AND 0.975 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.560 INCHES NOMINAL IN |
| Shoulder Shape | ROUND SECOND SHOULDER |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | ASTMA304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Rib Length | 0.410 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.971 INCHES MINIMUM AND 0.975 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT |
| Rib Quantity | 36 |
| Head Diameter | 1.310 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 |
| Part Number | Manufacturer |
|---|---|
| 12448496-4 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| RCSK15105-4 | Am General Llc (USA) |
NSN 5306-01-439-0282 is a Bolt,ribbed Shoulder, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-439-0282 has 2 manufacturer part numbers on file: 12448496-4 (U S Army Tank Automotive Command Amsta-Im-Mm), RCSK15105-4 (Am General Llc).
Key specifications for 12448496-4: Head Height: 0.310 INCHES NOMINAL IN; Fastener Length: 3.160 INCHES NOMINAL IN; Shoulder Length: 1.290 INCHES NOMINAL SECOND SHOULDER IN; Shoulder Length: 1.310 INCHES NOMINAL FIRST SHOULDER IN. 22 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.