The Bolt,shoulder, cataloged under National Stock Number 5306-00-994-1653, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-994-1653 |
| Primary Part Number | 1B9198 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Head Height | 0.688 INCHES NOMINAL IN |
| Shoulder Length | 8.344 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.500 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.438 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 8 |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 1B9198 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 805-1649887-46B | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-994-1653 is a Bolt,shoulder, manufactured by The Entwistle Company Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-994-1653 has 1 manufacturer part number on file: 1B9198 (The Entwistle Company Llc).
Key specifications for 1B9198: Head Height: 0.688 INCHES NOMINAL IN; Shoulder Length: 8.344 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 1.500 INCHES NOMINAL IN. 11 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.