For Mating TMM SMT Headers see stock number ; 481-4780 481-4780 typical. For Mating TMM Through Hole Headers see stock number ; 765-6212 765-6212 typical. SQT Series Rugged Sockets. These SQT Series of 2 mm pitch Board to Board Through-Hole Rugged Socket Strips from Samtec feature Tiger Buy 0.5 mm square Contacts with 0.25 m Gold plating on the contact area and matte Tin plating on the 0.5 mm square PCB Tails. This range of SQT Series of 2 mm pitch Board-to-Board Through-Hole Rugged Socket Strips are available in single and double row with vertical or horizontal orientation formats. The above board height of the SQT Series of 2 mm pitch Board to Board Vertical Through-Hole Rugged Socket Strips is 6.35 mm. The post length of these SQT Series of 2 mm pitch Board to Board Through-Hole Rugged Socket Strips is 2.29 mm. Insulator Material: Black LCP Temperature Range: -55 125 °C Current Rating: 5.5 A at 20 °C. SQT-1xx-01-L- S : single row vertical SQT-1xx-01-L-x- RA : horizontal SQT-1xx-01-L- D : double row vertical