Used on most cars and trucks, as well as many industrial machines. It is recommended that SAE-LT taper threads be assembled into 1/4”-28 UNF, Class 3B, straight threaded holes having a modified maximum minor diameter of 0.2151”, to ensure 75% minimum thread height.
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Used on industrial machines and heavy equipment.
Widely used for larger bearings on farm machinery and heavy industrial equipment. Recommended for heavy lubricants in cold weather.
Have special tapered drive threads which reshape the material in an untapped hole to provide a leak proof seal. They are most effectively installed by spinning into the untapped hole, but may be driven straight into the untapped hole. Thread forming fittings can be replaced by any standard threaded fitting or by another thread forming fitting.
These fittings provide a simple, cost effective alternative to tapping for various applications.