The Bolt,shoulder, cataloged under National Stock Number 5306-00-043-4549, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy, Inc.. Government technical data includes 16 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 | 5306-00-043-4549 |
| Primary Part Number | MS182EK |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Head Height | 0.609 INCHES NOMINAL IN |
| Fastener Length | 4.625 INCHES NOMINAL IN |
| Shoulder Length | 3.250 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 1.120 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 1.375 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.500 INCHES NOMINAL IN |
| Minimum Yield Strength | 105000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 8 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5306-00-043-4549 is a Bolt,shoulder, manufactured by Siemens Energy, Inc., classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-043-4549 has 2 manufacturer part numbers on file: MS182EK (Siemens Energy, Inc.), H2212PC3 (Siemens Energy, Inc.).
Key specifications for MS182EK: Head Height: 0.609 INCHES NOMINAL IN; Fastener Length: 4.625 INCHES NOMINAL IN; Shoulder Length: 3.250 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 1.120 INCHES NOMINAL FIRST SHOULDER IN. 16 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.