Cotter Pin

Cotter Pin, also known as Split Pin, Cotter Key, Safety Pin or Locking Pin, is a simple and reliable fastening component used to secure nuts, bolts, clevis pins, shafts and other mechanical parts from loosening or sliding out.

A cotter pin is normally inserted through a drilled hole in a bolt, shaft or pin. After insertion, the two legs are bent outward to lock the assembly in place. This makes Cotter Pin suitable for applications where a removable and economical locking method is required.

Cotter Pins are commonly used together with castle nuts, slotted nuts, clevis pins, shafts, linkages, trailer parts, agricultural equipment, machinery, automotive-light applications, construction equipment and general industrial maintenance work.

Material :

• Steel , Stainless Steel 304 (A2) , Stainless Steel 316 (A4)

Finishing :

• Steel comes in Zinc Plated Finishing

Dimensions:

Key Features:

• Simple and reliable locking pin for mechanical assemblies
• Also known as split pin, cotter key, safety pin or locking pin
• Used to secure bolts, nuts, clevis pins, shafts and linkages
• Legs can be bent after installation to prevent loosening or removal
• Suitable for removable locking and maintenance applications
• Commonly used with castle nuts, slotted nuts and drilled pins
• Steel option suitable for general industrial and machinery applications
• Stainless Steel 304 (A2) option suitable for better corrosion resistance and cleaner appearance
• Stainless Steel 316 (A4) option suitable for selected outdoor, coastal, marine, wet or chemical-prone environments
• Steel comes in Zinc Plated Finishing
• Practical for maintenance, repair, replacement, production assembly and project supply

Applications:

Cotter Pin is commonly used in:

• Castle nut and slotted nut locking
• Clevis pin securing
• Shaft and linkage retaining
• Machinery assembly and maintenance
• Trailer and towing component repair
• Agricultural machinery and farm equipment
• Automotive-light mechanical applications
• Construction equipment maintenance
• Pump, motor and gearbox service work
• Hinges, pins and pivot points
• Factory maintenance and MRO work
• Workshop repair and replacement work
• General commercial and industrial fastening applications

Common Related Names

Split Pin

• A common name for a two-leg pin that is inserted into a hole and bent to lock parts in place.

Cotter Key

• A common American name for cotter pin, especially in machinery and automotive applications.

Safety Pin

• Used when the pin is installed to prevent a nut, shaft or clevis pin from coming loose.

Locking Pin

• Used when the pin is selected as a simple mechanical locking component.

Why Choose Our Cotter Pin

Choosing the correct Cotter Pin is important for fitment, locking function, corrosion resistance and long-term assembly reliability. The pin should match the hole diameter, pin length, material, finishing, application load and working environment.

Steel Cotter Pin with Zinc Plated Finishing is a practical option for general machinery, workshop repair, factory maintenance, trailer parts, agricultural equipment and industrial applications. Stainless Steel 304 (A2) Cotter Pin is suitable when better corrosion resistance and cleaner appearance are required. Stainless Steel 316 (A4) Cotter Pin is suitable for selected outdoor, coastal, marine, wet or higher-corrosion environments.

Cotter Pins are useful because they are simple, economical and easy to install. They help prevent nuts, pins or shafts from loosening during operation. They are also commonly used in maintenance work because they can be removed and replaced when servicing machinery or equipment.

For best performance, the cotter pin should fit properly into the drilled hole. The legs should be bent securely after installation. For high-load, high-speed, safety-related or critical machinery applications, pin size, material, locking method and joint design should be checked by a qualified person or project specification.

We supply Cotter Pin for machinery users, factories, maintenance departments, trailer repair users, agricultural equipment users, automotive-light repair users, construction equipment users, metal fabricators, engineering companies, pump service teams, motor repair teams, gearbox service users, workshop users, hardware resellers and industrial customers in Selangor, Kuala Lumpur and across Malaysia, including Klang, Shah Alam, Puchong, Petaling Jaya, Subang, Port Klang, Balakong, Cheras, Kajang, Rawang, Semenyih, Ampang, Banting, Putrajaya, Cyberjaya and Seremban.