EXPANSION NUTS
ARaymond Tinnerman Expansion Nuts provide fast, vibration- resistant attachments in blind or center-panel locations where only one side is accessible. They snap easily into rectangular holes and are self-retained by spring legs. Special locking tabs are provided where permanent fastener retention is required.
As the screw is driven, the spring legs expand, locking them over the panel, while also providing a double-locking action on the screw (ultimately supplying the joint strength). These easy to apply fasteners require no special skills or equipment to install, and can be used in place of weld-, clinch-, or stake-type fasteners. Applied before or after painting, they will not clog and do not require masking.
Metal Expansion Nuts
ARaymond Tinnerman Metal Expansion Nuts are available in either box or robotics style design options.
Box style expansion nuts are primarily used in sheet metal applications. Once installed, these parts expand, reinforcing the attachment and providing a low failure risk. The strength of the part is greater than that of the panel, maximizing joint strength.
Tapered robotics expansion nuts can be used in plastic and metal panels and are suited for automation. These parts are available in key-hole, speed-nut and tapped barrel thread impressions.
The tapped barrel option provides the strongest attachment and assists with assembly, making it beneficial in high volume applications.
Plastic Expansion Nuts
ARaymond Tinnerman Plastic Expansion Nuts work well in applications where metal to metal contact is not desired. The insertion vs. retention ratio is not as high as their metal counterparts. Completely enclosed in plastic, the screw threads are protected from corrosion or galvanic action and all designs can be incorporated with a seal.
Industries and Applications
• Universal
• Sheet metal to sheet metal attachments on appliances, HVAC, industrial and automotive applications
• Great for attaching components and accessory equipment
Benefits
• Parts self-retain
• Easy to assemble – requires no special tools
• Provides a tight joint that is able to withstand vibrations
• Increases torque capability, improves quality and reduces re- work
• Great for high volume applications and easy to automate