Tee-Head Bolts. Tee-head bolts are used to close the joints on V-Band clamps. They must be seated correctly
and torqued in accordance with the applicable maintenance manual. Check the threads for wear and condition. Replace
tee-head bolt if there are signs of wear, galling, or deformation.
Aluminum Bolts. Aluminum bolts are used on aircraft in areas that are highly sensitive to magnetic field
changes. They are corrosion-resistant, and are usually hex-head-shaped. Care should be taken when installing these
bolts. Check for thread wear and replace in accordance with applicable maintenance manual.
Jo-Bolts. Jo-Bolts are high strength structural blind fasteners used in close tolerance holes where assembly does
not allow installation of AN, NAS, or MS bolts or, in some cases, where the installation of Jo-Bolts may be required for
weight saving advantages. However, Jo-Bolts are always considered to be a part of the permanent structure, and
primarily subject to shear loads. The Jo-Bolt, installed as a unit consists of a bolt, nut, and sleeve. Jo-Bolts are
identified by head type as descnbed in the following paragraphs. TM 1-1500-204-23-6