Armstrong 79-691 T-Slot Bolt 3/4" x 5" USA

A T-BOLT, ALSO REFERRED TO AS A T-SLOT BOLT, IS A THREADED FASTENER USED IN A MACHINE'S SLOT FOR HOLDING. T-SLOT BOLTS ARE OFTEN MADE FROM STEEL, WITH THEIR STRENGTH DESCRIBED IN EITHER GRADE OR CLASS. THEY MAY ALSO INCLUDE A COATING, SUCH AS BLACK OXIDE, FOR CORROSION RESISTANCE OR OTHER BENEFITS INCLUDING LUBRICITY. TENSILE STRENGTH AND HARDNESS SHOULD BE SPECIFIED, ALONG WITH THREAD FIT. T-BOLTS TYPICALLY HAVE THEIR LENGTH MEASURED FROM BENEATH THE HEAD, AND THIS INCLUDES BOTH THE THREADED AND UNTHREADED PORTIONS OF THE FASTENER'S SHANK. T-BOLTS USUALLY HAVE A LENGTH FROM UNDER HEAD, THREAD LENGTH, SCREW SIZE, AND COMPATIBLE SLOT WIDTH SPECIFIED. WHILE THE HEAD OF A T-BOLT IS SQUARE OR RECTANGULAR, IT MAY HAVE A SPECIALLY DESIGNED NECK OR A SMOOTH ROUND ONE.