A-A-52049
(2) Grommet. A grommet shall be placed inside the 1.56-inch diameter hole in the extension bracket, to protect he range pole.
c. Screw locking assembly. A screw locking assembly shall be provided to secure the extension bracket to the tripod head.
(1) Screw, locking. The extension bracket locking screw shall be case aluminum alloy or aluminum alloy wrought. The outside top portion of the locking screw shall have a coarse straight knurl. The outside bottom portion shall have 0.625-11 ()-2A threads. The top portion shall have one hole 0.156-inch diameter on each side to accommodate the bar.
(2) Bar. A bar, consisting of a spring steel wire, shall be inserted into the center of the top portion of the screw in the holes provided. The bar, bent U shape in the center maintains a spring action within the holes and provides an anchor for the link.
(3) Link. A link shall be inserted on the bar in the top center of the screw. The link provides captive chaining for the locking screw assembly when not in use.
d. Bracket, mounting. The mounting bracket shall be aluminum alloy casting with the tapped hole for a CRES helical coil insert. Three holes shall be provided for bolting the leg assemblies to the mounting bracket.
Note: Three screws, nuts, washers, and safety wire are required to attach the leg assemblies to the mounting bracket.
e. Level, circular, rod. A circular rod level consisting of a circular level vial mounted on a right angle support is provided and secured to the leg assembly with the extension bracket. The level vial mounting shall be adjustable.
f. Screw. A hexagonal head cap screw (finished hexagon bolt), shank drilled for cotter pin, is provided to secure the level and the extension bracket to the leg assembly.
g. Strap clamp. A strap clamp is provided to secure the level and the extension bracket to the leg assembly.
3. Identification. The tripod shall be identified with the manufacturer’s name or trademark.
4. Treatment and painting. The tripod shall be cleaned, treated, and painted.
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