The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-00-345-3259, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-345-3259 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Shoulder Length | 0.781 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.555 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.969 INCHES MINIMUM IN |
| Shoulder Shape | RIBBED FIRST SHOULDER |
| Hardness Rating | 210.0 BRINELL STANDARD MINIMUM AND 260.0 BRINELL STANDARD MAXIMUM OVERALL |
| Material Document and Classification | ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Rib Length | 0.781 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | BINDING |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.555 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1040 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.750 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 |
|---|---|
| G661A | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-00-345-3259 is a Bolt,ribbed Shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-345-3259: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 1.750 INCHES NOMINAL IN; Shoulder Length: 0.781 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.555 INCHES NOMINAL FIRST SHOULDER IN. 19 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.