Figure 1-15.
Huck Lock Bolts.
Jo-Bolts.
Jo-Bolts are high-strength structural blind fasteners.
They are used in close-tolerance holes or where Jo-Bolts may be
required for weight-saving advantages.
In all cases, Jo-Bolts are
always considered to be a part of the permanent structure and
primarily subject to shear loads. The Jo-Bolts, installed as a unit,
consist of a bolt, nut, and sleeve. These bolts, identified by head
types, are discussed in the following paragraphs and illustrated in
Figure 1-16.
Flush-type. The flush-type Jo-Bolt has a head that fits flush with
the surface being held.
The bolt generally uses the same size
countersink or dimple required for the correspondingly sized standard
screwhead.
The nut and bolt are made of alloy steel; however, the
sleeve is made of annealed corrosion-resistant steel. All components
for the flush-type Jo-Bolt are cadmium plated. In addition, a flush-
type Jo-Bolt is available that is designed to fit into a countersunk
or dimpled hole prepared for a precision rivet.
Nut shank size and
material specifications are the same as those just described.
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AL0992
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