ASI ASI391005 UTD-41 NEMA Style Ring Lug Connection Din Rail Mount Terminal Block is UL rated at 50 Amps, 600 Volts with a wire range of 12 to 8 AWG and is 14. 5 mm wide. The terminal block snaps easily onto either the 7. 5 x 35 mm DIN rail (PR005-1M and PR003-1M) or the 15 x 35 mm DIN rail. The blocks interlock for added stability and have a locking washer for assured connection. ASI393030, 10 position side jumpers, are used for easy circuit cross connection of the blocks (sold separately). Use ASI392002 end cover for the last terminal block on the DIN rail assembly (sold separately). For easy identification of each NEMA style terminal block, select ASI394006 blank strip markers which can use CT004 or CT006 permanent markers to label (sold separately). The ASI391005 NEMA style ring lug connection terminal blocks come 50 terminal blocks per package.