Tag Archives: Rivet

How To Measure a Blind Rivet

One of the most common questions we’re asked is, “How do you measure a rivet?”

Let’s use a common code description and break it down, we’ll use ABL6-8A as our example.

The first letter “A” indicates the rivet material. For instance, “A” for aluminum, “S” for steel, “C” for copper and “SS” for stainless steel.

The second letter tells us the head style, “B” for button head, “C” for countersunk.

If there’s a third letter in the description, it’ll be an “L” for large flange head.

The first number in the description is for body diameter, in 32nds.

The second number indicates maximum grip length in 16ths. Grip Range is the “working range” that the rivet can handle to meet the strengths designated in the IFI 114 Standards. Grip Range is not actual length. As a general rule, you would want to subtract 1/8″ off the length of the barrel for the barrel to be able to expand and lock the material together. So using your math skills and reducing 8/16″ to 1/2″ and subtracting 1/8″ you would have a grip range of 3/8″ and your rivet would have a size of 6-8.

The final letter is the mandrel (nail or stem} material. “A” for aluminum, “S” for stainless steel, “B” for brass, “C” for copper. No letter indicates a steel mandrel.

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Measuring A Rivet

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5 Tips for Using Blind Rivets Effectively

Fastening with blind rivets can be a cost-efficient method for fastening… some tips are

 

#1. The shear and tensile strength of the blind rivet selected and the number of blind rivets used in the application should equal or exceed the joint strength requirements.

#2. The blind rivet body material should be compatible with the materials to be joined to resist galvanic corrosion that may result in a reduction of joint strength. If dissimilar materials are widely separated on the galvanic chart, it is advisable to separate them with a dielectric material such as paint or other coatings.

#3. The total thickness of materials to be joined must be considered. Select the rivet “grip range” which includes the total thickness of materials to be joined.

#4. Use recommended hole sizes for each blind rivet. An undersized hole will not allow insertion of rivet body and an oversize hole may cause rivet failure, joint failure and could adversely affect rivet shear and tensile strengths.

#5. Various head styles are offered to accommodate different assembly needs. The most popular is the button head, whose lower-profile head is twice the diameter of the rivet body. This provides an adequate bearing surface for nearly all applications. The large flange rivet provides a greater bearing surface for fastening soft or brittle facing materials. The countersunk head rivet is available for applications where a flush appearance is required.

Visit the Blind Rivets section of tannerbolt.com.