Three Hole Round Plate Nuts with Threaded Plate Fasteners for Metal and Machinery Manufacturers, Suppliers

Product Description

Product Overview

This product is a three-hole disc nut (round disc) made of high-quality carbon steel with a zinc plating, giving a matte silver-gray surface. It has a thick disc body with three internally threaded holes arranged along the diameter on the top face: the large central hole is used for the main connection, while the two smaller side holes can be used for auxiliary fixing, locking or adjustment. The thick disc offers a wide bearing surface and even load distribution for a firm and reliable connection, and the rounded outer edge is smooth and safe to handle. It is widely used in machinery assembly, adjustment and locking mechanisms, and as a connecting or mounting disc.

Product Features

Versatile three-hole design: The large central threaded hole carries the main connection, while the two smaller side holes serve for auxiliary fixing, locking or adjustment, making one part serve multiple functions with flexible assembly.

Thick disc structure: The thick, solid body provides a large bearing area and even load distribution for a stable, reliable connection with strong resistance to deformation.

Precision internal threads: The threads in all three holes are clearly formed, uniform and complete, ensuring smooth engagement and reliable locking with standard bolts and studs.

Zinc-plated carbon steel: The high-quality carbon steel base is zinc plated with a uniform silver-gray finish for good rust and corrosion resistance in a variety of environments.

Rounded outer edge: The rounded edge is smooth and flat, safe to handle, free of snagging points and neat in appearance.

Application Field

This product is widely used in machinery assembly, adjustment and locking mechanisms, connecting and mounting discs, and pump, valve and transmission components. It is especially suitable for assembly positions where the central threaded hole provides the main connection while the two side holes are used for auxiliary fixing or locking.

Instructions for use

Selection: Choose a disc nut of suitable size and thickness according to the thread specification of the central hole, the screw size used in the side holes and the installation space, and check that the threaded holes are in good condition and clear.

Cleaning and inspection: Clean oil, dirt and burrs from the threaded holes before installation, and confirm the disc body is free of dents or deformation.

Installation: Align the central threaded hole of the disc nut with the main stud or connecting part and screw it into position; then thread set screws or bolts into the two smaller side holes for auxiliary fixing or locking.

Inspection: Confirm the central connection is fully seated and the side fasteners are secure; in vibrating applications, inspect and re-tighten periodically.

Maintenance

Rust protection: The zinc plating provides corrosion protection; avoid scratching the coating, and apply anti-rust oil in humid environments or before long-term storage.

Periodic inspection: For connections under long-term load or in vibrating environments, check regularly for loosening or corrosion and re-tighten or replace in time.

Thread cleaning: Clean oil and dirt from the threaded holes regularly to keep the threads clean and ensure smooth engagement.

Proper use: Always use matching specifications, avoid over-torquing that may damage the threads, and never reuse disc nuts with damaged or deformed threads.

FAQ

Q: What material and surface finish does this disc nut have?

A: It is made of high-quality carbon steel with a zinc plating, giving a uniform silver-gray finish with good rust and corrosion resistance. The specific material and plating process are subject to the product specification.

Q: What are the functions of the three threaded holes?

A: The large central hole is used for the main connection and can be screwed directly onto a stud or connecting part, while the two smaller side holes are used for auxiliary fixing, locking or adjustment, for example to take set screws that prevent the connection from loosening.

Q: What are the benefits of a thick disc body?

A: The thick body provides a large bearing area and even load distribution, improving connection stability and resistance to deformation, making it suitable for assembly positions with high fastening reliability requirements.

Q: How to select the right specification?

A: Choose the appropriate size and thickness according to the central hole thread specification, the screw size used in the side holes and the installation space. Provide your mating dimensions for sizing assistance.

Q: How to prevent loosening and rust?

A: Tighten the central connection to the specified torque and use set screws in the side holes for auxiliary locking; re-tighten periodically in vibrating environments. The zinc plating provides basic corrosion protection — avoid scratching it and apply anti-rust oil for long-term storage.