The Bolt,shoulder, cataloged under National Stock Number 5306-01-267-8499, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 21 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-267-8499 |
| Primary Part Number | A51825566-15 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.490 INCHES NOMINAL IN |
| Fastener Length | 3.630 INCHES NOMINAL IN |
| Shoulder Length | 0.810 INCHES MINIMUM AND 0.820 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Length | 1.665 INCHES MINIMUM AND 1.675 INCHES MAXIMUM SECOND SHOULDER IN |
| Surface Treatment Document and Classification | MIL-C-8837 CL 1 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 1.1210 INCHES MINIMUM AND 1.1216 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 1.4345 INCHES MINIMUM AND 1.4351 INCHES MAXIMUM SECOND SHOULDER IN |
| Thread Length | 1.145 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ISI 1095 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.180 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 1095 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 |
|---|---|
| A51825566-15 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51825566-15 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51B25566-15 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| A51825566-15 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5306-01-267-8499 is a Bolt,shoulder, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-267-8499 has 1 manufacturer part number on file: A51825566-15 (Northrop Grumman Systems Corporation).
Key specifications for A51825566-15: Head Height: 0.490 INCHES NOMINAL IN; Fastener Length: 3.630 INCHES NOMINAL IN; Shoulder Length: 0.810 INCHES MINIMUM AND 0.820 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Length: 1.665 INCHES MINIMUM AND 1.675 INCHES MAXIMUM SECOND SHOULDER IN. 21 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.