The Bolt,shoulder, cataloged under National Stock Number 5306-01-252-8051, 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 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-252-8051 |
| Primary Part Number | 123CM41009-611 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.156 INCHES NOMINAL IN |
| Fastener Length | 2.281 INCHES NOMINAL IN |
| Shoulder Length | 1.218 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3104 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.077 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 1095 OR STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 6150 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.165 INCHES NOMINAL FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 123CM41009-611 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 123CM41009 | Capy Machine Shop Inc. Dba Capy Machine Shop Inc (USA) |
| 123CM41009 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 123CM41009 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 123CM41009-611 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 123CM41009 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 123CM41009 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. |
| 123CM41009 | 5/9 Secondary reference Airlift Peconic Inc Div of Air Marine Electro Plating |
NSN 5306-01-252-8051 is a Bolt,shoulder, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-252-8051 has 3 manufacturer part numbers on file: 123CM41009-611 (Northrop Grumman Systems Corporation), 123CM41009 (Capy Machine Shop Inc. Dba Capy Machine Shop Inc), 123CM41009 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems).
Key specifications for 123CM41009-611: Head Height: 0.156 INCHES NOMINAL IN; Fastener Length: 2.281 INCHES NOMINAL IN; Shoulder Length: 1.218 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.