Grounding Ball Stud
Grounding Ball Studs are essential electrical components made of copper with electrolytic tin coating, designed to establish low-resistance paths for electrical currents. The structure consists of a main stud body with internal threading, a spherical ball component, and mounting hardware including washers and nuts. Grounding Ball Studs come in various sizes with ball diameters of 20mm, 25mm, and 30mm, featuring different thread sizes (M12, M16) and configurations including straight and 30-degree angle versions.
These Grounding Ball Studs function as critical connection points in safety grounding systems, providing secure attachment points for grounding clamps and cables. Installation involves mounting the stud to equipment using the appropriate torque specifications, ensuring proper electrical contact. Grounding Ball Studs work with various grounding equipment including personal protective ground grids, temporary grounding sets, and safety grounding appliances in industrial settings, power distribution units, and electrical substations.
Key Features:
• Grade 5H rated for high current capacity up to 43kA for 15 cycles
• Available in multiple ball sizes (20mm, 25mm, 30mm) for different applications
• Copper construction with electrolytic tin coating for superior conductivity
• Tested and certified to IEC/EN 61230 standards
• Compatible with standard NEMA terminal pads
• Designed for reliable performance in extreme weather conditions
Grounding Ball Stud Drawing
| Catalog Number | ASTM Grade | A | B | C (in) | D (in) | E | Weight (lbs) |
| 03-M-006 | 5H | 20mm | 1/2″-13 | 7/8 | 2-5/16 | No Screw | 0.2 |
| 03-M-006-0.5 | 5H | 20mm | 1/2″-13 | 7/8 | 2-5/16 | 1/2 | 0.3 |
| 03-M-006-1 | 5H | 20mm | 1/2″-13 | 7/8 | 2-5/16 | 1 | 0.4 |
| 03-M-026 | 5H | 20mm | 1/2″-13 | 7/8 | 4 | No Screw | 0.6 |
| 03-M-026-0.5 | 5H | 20mm | 1/2″-13 | 7/8 | 4 | 1/2 | 0.7 |
| 03-M-026-1 | 5H | 20mm | 1/2″-13 | 7/8 | 4 | 1 | 0.7 |
| 03-M-027 | 5H | 20mm | 5/8″-11 | 1 | 4 | No Screw | 0.8 |
| 03-M-027-0.5 | 5H | 20mm | 5/8″-11 | 1 | 4 | 1/2 | 0.9 |
| 03-M-027-1 | 5H | 20mm | 5/8″-11 | 1 | 4 | 1 | 0.9 |
| HC-30012 | 5H | 30mm | 5/8″-11 | 1-1/2 | 4-3/8 | No Screw | 1.8 |
| HC-30012-0.5 | 5H | 30mm | 5/8″-11 | 1-1/2 | 4-3/8 | 1/2 | 1.9 |
| HC-30012-1 | 5H | 30mm | 5/8″-11 | 1-1/2 | 4-3/8 | 1 | 1.9 |
| HC-30015 | 5H | 20mm | 1/2″-13 | 7/8 | 6 | No Screw | 0.8 |
| HC-30015-0.5 | 5H | 20mm | 1/2″-13 | 7/8 | 6 | 1/2 | 0.9 |
| HC-30015-1 | 5H | 20mm | 1/2″-13 | 7/8 | 6 | 1 | 0.9 |
| HC-30028 | 5H | 20mm | 5/8″-11 | 1 | 2-5/8 | No Screw | 0.7 |
| HC-30028-0.5 | 5H | 20mm | 5/8″-11 | 1 | 2-5/8 | 1/2 | 0.8 |
| HC-30028-1 | 5H | 20mm | 5/8″-11 | 1 | 2-5/8 | 1 | 0.8 |
| HC-30029 | 5H | 25mm | 1/2″-13 | 1 | 3 | No Screw | 0.5 |
| HC-30029-0.5 | 5H | 25mm | 1/2″-13 | 1 | 3 | 1/2 | 0.6 |
| HC-30029-1 | 5H | 25mm | 1/2″-13 | 1 | 3 | 1 | 0.6 |
| HC-30036 | 5H | 25mm | 1/2″-13 | 1 | 6-1/4 | No Screw | 1.1 |
| HC-30036-0.5 | 5H | 25mm | 1/2″-13 | 1 | 6-1/4 | 1/2 | 1.2 |
| HC-30036-1 | 5H | 25mm | 1/2″-13 | 1 | 6-1/4 | 1 | 1.2 |
| HC-30037 | 5H | 25mm | 5/8″-11 | 1 | 3 | No Screw | 0.4 |
| HC-30037-0.5 | 5H | 25mm | 5/8″-11 | 1 | 3 | 1/2 | 0.5 |
| HC-30037-1 | 5H | 25mm | 5/8″-11 | 1 | 3 | 1 | 0.5 |
Frequently Asked Questions (FAQ)
What is a grounding ball stud used for?
A grounding ball stud establishes a low-resistance path for electrical currents to dissipate into the ground. It prevents static electricity buildup and reduces the risk of electrical shocks in industrial settings, power distribution units, and electrical equipment while maintaining a stable electrical environment.
What materials are grounding ball studs made from?
Grounding ball studs are manufactured from copper and stainless steel alloys, with an electrolytic tin coating. These materials ensure corrosion resistance, durability, and optimal electrical conductivity while minimizing maintenance requirements.
What are the standard specifications for grounding ball studs?
Standard grounding ball studs typically have a 1-inch (25mm) diameter ball, 3-inch nominal shank length, and are tested to ASTM F855 Grade 5 standards. They can withstand 43kA for 15 cycles or 30kA for 30 cycles, with a recommended installation torque of 25 ft-lb.
What are the main components of a grounding ball stud?
A grounding ball stud consists of a stud body with threading, spherical ball component, ball socket housing, bearings for smooth articulation, protective boot seal, securing circlip, grease fitting, and jam nut for secure placement.
What certifications do grounding ball studs require?
Grounding ball studs must be tested and certified according to IEC/EN 61230 (5.7) standards and ASTM F855 Grade 5 specifications. These certifications ensure their reliability under extreme weather conditions, electromagnetic interference, and seismic events.
What sizes are available for grounding ball studs?
Grounding ball studs come in various sizes including 20mm, 25mm, and 30mm ball diameters. They are available with different thread sizes like M12 and M16 fastening options, and can include straight or angled (30°) configurations.
