8 5/8" ID Gum Rubber Boot, Cut to Length

This is the workhorse size in grain and feed. It is the flex connector between bucket elevator heads and spouting runs, the sleeve at a distributor outlet, and the short connection into a bin fill. Cement terminals use it on small loading spouts and aspiration lines.

Run a 1/4 inch wall as the default. Grain is not especially abrasive, but it moves constantly, and the sleeve at a clamp line is doing the same flexing several thousand times a season. If the run carries hot pellets or a scaled feed with grit in it, step up to 3/8 inch and it will outlast two of the thin ones.

A note worth repeating: this is the size where cold-bonded sleeves fail first. The band clamp squeezes the glued overlap, the seam creeps, and it splits at the clamp line, usually mid-harvest. Ours are hot vulcanized so the overlap is cured into one piece of rubber.

Cross-reference and old part numbers

Working from an old part number instead of a measurement? Put the number in the notes field on the RFQ and we will match the dimensions. We regularly build equivalents to MPParts, Vince Hagan, CEPI and other catalog boots.