The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-00-776-2028, 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 24 specifications, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-776-2028 |
| Primary Part Number | 7762028 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.281 INCHES NOMINAL IN |
| Rib Included Angle | 90.0 DEGREES NOMINAL |
| Fastener Length | 2.657 INCHES NOMINAL IN |
| Shoulder Length | 0.875 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Distance From Largest Diameter of Bearing Surface of Head to Ribs | 0.094 INCHES NOMINAL IN |
| Shoulder Diameter | 0.745 INCHES MINIMUM AND 0.750 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.313 INCHES MINIMUM IN |
| Shoulder Shape | RIBBED FIRST SHOULDER |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | FF-B-00575,GR8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Rib Length | 0.562 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.868 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND ZINC OVERALL |
| Minimum Tensile Strength | 146000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Rib Quantity | 43 |
| Head Diameter | 1.188 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 |
|---|---|
| 7762028 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5306-00-776-2028 is a Bolt,ribbed Shoulder, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-776-2028 has 1 manufacturer part number on file: 7762028 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7762028: Head Height: 0.281 INCHES NOMINAL IN; Rib Included Angle: 90.0 DEGREES NOMINAL; Fastener Length: 2.657 INCHES NOMINAL IN; Shoulder Length: 0.875 INCHES NOMINAL FIRST SHOULDER IN. 24 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.