Rivet Terminology/Nomenclature

 1. Hole size
Hole size can be important in blind riveting. Too small
a hole will, of course, make rivet insertion difficult.
Too large a hole will reduce the shear and tensile
strengths. It may also cause bulging or separation of
the members by allowing the rivet to expand between
them instead of only on the blind side. (Best practice
is to follow the hole size recommendations provided).
Avoid burrs in and around the holes.
2. Grip Range
The recommended thickness range over which the
body length will consistently provide a proper
setting in a hole of the specified diameter.
3. Shear
The load applied to a fastener along the joint interface.
4. Tensile
The load applied to a fastener along its length.
5. Joint strength
First determine the single-joint tensile and shear values required for the
application. These are functions of total joint strength, fastener spacing, rivet
body material and rivet diameter. Then refer to the "Shear" and "Tensile" in the
Rivet Selection Guide (pp14-50) on the product, and select a POP brand rivet
that provides the values required. POP brand rivets are not certified for
structural aerospace applications and such use is not recommended.
6. Joint thickness
Measure the total thickness of the materials to be joined. This determines the
required "grip" of the rivet you select. Refer to the "Grip Range" in the Rivet
Selection Guide (pp14-50) and select a rivet with a grip range that includes
the work thickness required. Remember that insufficient rivet length will not
allow proper formation of the secondary head at the back of the work.
7. Nature of materials
Both the rivet and the materials to be fastened will affect the ultimate joint
strength. As a rule, the rivet materials should have the same physical and
mechanical properties as the materials to be fastened, because a marked
dissimilarity may cause joint failure due either to material fatigue or galvanic
corrosion.
8. Head Style
The low-profile domed head is appropriate for most applications. However,
when soft or brittle materials are fastened to a rigid backing member, the large
flange head should be considered because it offers twice the bearing. surface.
Where a flush surface is required, the countersunk head style should be
selected.
These illustrations provide a graphic representation of the rivet selection factors
to be considered and described in greater detail in the accompanying text.
Rivet Terminology/Nomenclature
Domed Head Large Flange Countersunk