Suit Ford SB/BB 289-460 (1985 & Earlier) 5/16-18 Thread. The Importance Of Pressure Plate Bolts In A Racing Or High Performance Street Applications Cannot Be Emphasized Nearly Enough. These Fasteners Play A Key Role In Both The Performance And Safety Of A Vehicle. Because Of This Arp Has Developed Special Pressure Plate Bolts That Are Application-Specific To Ensure The Optimum Grip Length. Arp Offers High Performance Series Bolts That Are Made From A Premium-Grade Chromoly And Hardened To A Nominal Tensile Strength Of 180000 Psi.