The Bolt,shoulder, cataloged under National Stock Number 5306-00-281-3711, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Babcock & Wilcox Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 49 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-281-3711 |
| Primary Part Number | MX261186-2PC99 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Babcock & Wilcox Co |
| Status | ACTIVE |
| Head Height | 0.359 INCHES NOMINAL IN |
| Fastener Length | 1.141 INCHES NOMINAL IN |
| Shoulder Length | 0.641 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.625 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.500 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.062 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | C CLASS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 1050 OR STEEL COMP 1552 OR STEEL COMP 1053 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 |
| Part Number | Manufacturer |
|---|---|
| MX261186-2PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| ML204764PC386 PRIMARY | Babcock & Wilcox Co (USA) |
| MX260380-7PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX251020PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX261288-1PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX230975PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX293874PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX230589PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX262367-2PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX253747PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX262879PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX243765PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MI253791PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| ML204101PC386 PRIMARY | Babcock & Wilcox Co (USA) |
| MX229486PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| 1552F2PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX260168-3PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX260120-2PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| MX270230-3PC99 PRIMARY | Babcock & Wilcox Co (USA) |
| ML253723PC44 PRIMARY | Babcock & Wilcox Co (USA) |
| Reference | Meaning |
|---|---|
| MX-261193-3 PIECE 99 | C/1 Advisory reference — outside the item-of-supply concept The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
NSN 5306-00-281-3711 is a Bolt,shoulder, manufactured by Babcock & Wilcox Co, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-281-3711 has 49 manufacturer part numbers on file: MX261186-2PC99 (Babcock & Wilcox Co), ML204764PC386 (Babcock & Wilcox Co), MX260380-7PC99 (Babcock & Wilcox Co), MX251020PC99 (Babcock & Wilcox Co), MX261288-1PC99 (Babcock & Wilcox Co) and 44 more.
Key specifications for MX261186-2PC99: Head Height: 0.359 INCHES NOMINAL IN; Fastener Length: 1.141 INCHES NOMINAL IN; Shoulder Length: 0.641 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.625 INCHES NOMINAL FIRST SHOULDER IN. 15 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.