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Jack Nuts

Welcome To Our Jack Nut Collection

The Jack Nut, also referred to as the ‘Molly Nut’, is a light-duty alternative to the Plus Nut. It features a flat head and a slotted body. The jack nut is a blind threaded insert made for thin, soft, or brittle materials like soft plastic, paper, or glass.

During installation, the body of the fastener crimps to form a strong, reusable thread. Four legs expand behind the parent material. This design offers great pull-out resistance, especially in soft materials.

RivetLab provides high-quality steel jack nuts in different grip ranges. These include sizes from M4 to M6 and the ¼” imperial size. They are available in packs starting from 50 pieces.

We stock various other rivet nuts and fasteners in addition to jack nuts. For large quantities, please don't hesitate to contact us directly or email sales@rivetlab.com to discuss bulk discounts.

6 products

How to Install Jack Nuts

Thanks to the four large slots in the jack nut's body, installation of these inserts is straightforward. You can easily install them at lower volumes with a manual rivnut tool. An example is the FAR KJ15 rivnut tool. Refer to the demonstration video below for step-by-step installation guidance.

Common Applications

Jack nuts serve a wide range of industries, including automotive, aerospace, agriculture, electronic components, vehicles, and manufacturing. They are ideal for light-duty tasks and excel with extremely thin materials.

Jack Nut vs. Rivet Nut

Both jack nuts and rivet nuts are a type of fastener used to join materials securely. They have internally threaded bodies. After installation, the body of the fasteners collapses to form a secure set screw or bolt anchor point. However, they have different features, and designers create them for different applications.

Body Structure:

  • Jack Nut: The body collapses by design. After installation, its legs expand behind the material, creating a secure grip. Manufacturers often make them from softer materials like aluminium or zinc-plated steel. They feature a wide grip range and a better tolerance of oversized holes.
  • Rivet Nut: A technician installs a standard rivet nut using a manual or pneumatic tool. During installation, the unthreaded part of the rivet nut collapses behind the material. This creates a strong and secure hold. Manufacturers often make them from various materials, like aluminium, stainless steel or steel.

Applications:

  • Jack Nut: Simple to install, jack nuts are suitable for non-load-bearing applications. These include thin, soft, or fragile materials, such as plastic or thin sheet metal. Standard nut inserts may not effectively grip these materials.
  • Rivet Nut: Rivet nuts commonly serve applications requiring high strength and durability. They work well with both thin and thicker, harder materials, making them suitable for more robust requirements.

You can easily purchase jack nuts in Australia online. Receive up to 40% off when you order 1,000 pieces or more. Or, you can place an order over the phone with our sales team.