Product: 30PCs 1/4"-20 Stainless Steel Rivet Nuts Nutsert Threaded Rivet Insert Rivnuts 1/4-20UNC
Brand: Sprite Science

A Rivet Nut fastener is a tubular rivet with internal thread which can be installed in seconds form one side of the work. Once installed, no finishing work is required on the RIVNUT fastener. 
 
The added benefit of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments. 
 
Rivet Nuts also are used when an application has little or no access to the backside as they can be installed from the front side of the work piece.
30x stainless steel rivet nut.
Thread pitch: 1/4-20.
Thread Diameter: 5.35mm / 1/4 inch; Thread Pitch: 1.6mm / 1/16 inch.
Grip Range: 0.7mm-4mm / 0.027"-0.125"; Body Diameter: 8.9mm / 0.350"
Total Length: 15.5mm / 0.610"; Application Hole Size: 0.351"-0.356".

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