Push-On Fasteners

Push-on fasteners are quick-fit retaining components designed for unthreaded shafts, studs, and axles. Including push nuts and retainer clips, they grip smooth shafts using internal teeth or spring tension to provide secure axial retention without threading or tools.

Commonly manufactured from spring steel, stainless steel, or plastic, they are widely used in high-speed industrial assembly where efficiency and reliability matter.

Types of Push-On Fasteners

Push-on fasteners come in several forms, each suited to specific shaft designs and assembly needs:

• Push Nuts: Often referred to as push nut retainers, these fasteners feature internal teeth that bite into the shaft to resist pull-off forces. They are commonly used on smooth rods, axles, and pins where vibration resistance is required.
• Push-On Hat Retainers: Designed with a raised cap, these protect exposed shaft ends while also retaining components in place. They are frequently used where safety or a finished appearance is important.
• Push-On Speed Nuts: Unlike threaded speed nuts, push-on speed nuts are pressed axially onto smooth studs. Their spring-steel design allows rapid installation while maintaining consistent holding force.
• Push-On Bolt Retainers: These retainers temporarily hold bolts or screws in panels or housings before final assembly. They are not load-bearing fasteners themselves but improve handling efficiency during installation.
• Starlock Push Nuts: Starlock push nuts feature a distinctive star-shaped internal profile that cuts into the shaft surface as it is pressed on. This design delivers exceptionally strong, permanent retention, making them suitable for high-vibration environments.
• Capped Push Fasteners: Capped push fasteners combine retention with aesthetics. Available in plastic or chrome finishes, they conceal exposed shaft ends while maintaining a secure hold.
• Flat Push-On Metal Clips: Flat push-on metal clips are designed for high-speed, automated assembly on flat or grooved studs. Their low-profile design makes them ideal where space is limited.

Understanding Types of Push Nut and Retainer Clips

While often grouped together, push nuts and push-on retainer clips differ slightly in function:

• Push nuts provide strong, permanent retention by deforming internally around the shaft.
• Retainer clips focus on holding components in position during assembly or operation, sometimes allowing limited removal depending on design.

Choosing the Right Push-On Fastener for the Shaft

Push-on fasteners are specifically engineered for smooth, unthreaded shafts, not bolts or threaded rods. Correct sizing is critical:

• Shaft diameter vs. hole size: For a push nut to grip effectively, the internal teeth must be slightly smaller than the shaft diameter. This interference creates the spring tension needed for secure retention.
• Metric and imperial compatibility: Many push-on retainers are available to suit both metric and imperial shafts — an important consideration for Australian facilities working with mixed equipment standards.
• Installation intent: Some push-in fasteners are designed for permanent fixing, while others allow controlled removal during maintenance.

Material Selection: Steel, Stainless, and Plastic Push-on Retainers

Choosing the right material ensures performance and longevity:

• Spring Steel (Phosphate or Zinc Plated): The industry standard for push-on fixings, offering high tension, strong grip, and cost efficiency.
• Stainless Steel (316 Grade): Ideal for food processing, marine, and outdoor environments where corrosion resistance is critical — commonly used for push-on metal clips.
• Plastic / Nylon: Lightweight and corrosion-free, suited for decorative trim, light-duty retention, and electrical applications.

Industrial Applications for Push-On Fasteners

Push-on fasteners are widely used across industries where fast, reliable retention is required:

• Manufacturing & Assembly: Used to retain wheels, rollers, and linkages on shafts during mass production.
• Automotive & Transport: Common in trim, seating mechanisms, and underbody assemblies where vibration resistance is essential.
• Electrical & Appliance Manufacturing: Used to secure fans, rotors, and internal components without threaded hardware.
• Furniture & Equipment Fabrication: Applied to axles, pivots, and structural pins where clean finishes and rapid assembly are priorities.

Buy Push-On Fasteners Online from RS

RS Australia is a trusted supplier and distributor of push-on fasteners, offering a broad selection of push nuts, push-on retainer clips, and push-in fasteners from leading brands such as RS PRO and HENSEL.

Alongside push-on fixings, RS also supplies related components including seal & o-rings, washers, clips, and general fastening solutions — allowing you to source everything in one order.

Ordering online is straightforward through our product catalogue, with clear specifications to help you select the correct shaft size and material. RS provides reliable nationwide delivery across Australia, with fast dispatch options to support production schedules. Find out more on our delivery information page.

Explore the full range and buy push-on fasteners online from RS for dependable performance and efficient assembly.