LANTAC MPX 13.5mm Crush Washer Black. 5 mm thread. NOTE: Crush washers are only intended to be used (1) time. Using a crush washer multiple times will decrease the effectiveness of the washer. made in specialized factories. Specifications for LANTAC MPX 13.5mm Crush Washer: Manufacturer: LANTAC Gun Model: SIG Sauer MPX Color: Black Features of LANTAC MPX 13.5mm Crush Washer This crush washer is designed for SIG MPX flash hider or compensator installation on barrels with a 13.5 mm thread. NOTE: Crush washers are only intended to be used (1) time. Using a crush washer multiple times will decrease the effectiveness of the washer. Package Contents: LANTAC MPX 13.5mm Crush Washer What firearm models does the manufacturer say LANTAC MPX 13.5mm Crush Washer is compatible with? The manufacturer says that LANTAC MPX 13.5mm Crush Washer is compatible with SIG Sauer MPXLANTAC 01-PP-1351-CRW: MPX 13.5mm Crush Washer Black