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Federal Supply Class
A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The connections have standard pipe threads or 1s unthreaded and designed to accommodate a pipe. It may have side inlet(s). It is used as a junction at the intersection of pipe or pipe fittings.
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MATERIAL DOCUMENT AND CLASSIFICATION
ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL