The Bolt,shoulder, cataloged under National Stock Number 5306-01-178-0187, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-178-0187 |
| Primary Part Number | 5051M52P01 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Extended Washer Thickness | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Head Height | 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Fastener Length | 2.100 INCHES MINIMUM AND 2.120 INCHES MAXIMUM IN |
| Shoulder Length | 1.720 INCHES MINIMUM AND 1.730 INCHES MAXIMUM FIRST SHOULDER IN |
| Extended Washer Diameter | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.311 INCHES MINIMUM AND 0.320 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.316 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.375 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 5051M52P01 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 5051M52P01 | General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp (USA) |
| 5051M52P01 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| 5051M52P01 PRIMARY | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 5051M52P01 | 5/9 Secondary reference Mchaffie Inc |
NSN 5306-01-178-0187 is a Bolt,shoulder, manufactured by General Electric Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-178-0187 has 4 manufacturer part numbers on file: 5051M52P01 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 5051M52P01 (General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp), 5051M52P01 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 5051M52P01 (General Electric Company).
Key specifications for 5051M52P01: Extended Washer Thickness: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Head Height: 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN; Fastener Length: 2.100 INCHES MINIMUM AND 2.120 INCHES MAXIMUM IN; Shoulder Length: 1.720 INCHES MINIMUM AND 1.730 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.