The Bolt,shoulder, cataloged under National Stock Number 5306-00-006-2145, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-006-2145 |
| Primary Part Number | A51B25566-17 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Head Height | 0.490 INCHES NOMINAL IN |
| Fastener Length | 3.730 INCHES NOMINAL IN |
| Shoulder Length | 0.810 INCHES MINIMUM AND 0.820 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Length | 1.765 INCHES MINIMUM AND 1.775 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 1.222 INCHES MINIMUM AND 1.123 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 1.434 INCHES MINIMUM AND 1.435 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.145 INCHES NOMINAL IN |
| Shoulder Shape | ROUND SECOND SHOULDER |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.802 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL 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 |
|---|---|
| A51B25566-17 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| A51B25566-17 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| A51B25566-17 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5306-00-006-2145 is a Bolt,shoulder, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-006-2145 has 1 manufacturer part number on file: A51B25566-17 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems).
Key specifications for A51B25566-17: Head Height: 0.490 INCHES NOMINAL IN; Fastener Length: 3.730 INCHES NOMINAL IN; Shoulder Length: 0.810 INCHES MINIMUM AND 0.820 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Length: 1.765 INCHES MINIMUM AND 1.775 INCHES MAXIMUM SECOND 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.