3/8” Diameter Shoulder Bolt X 3-1/2” L X 5/16-18 Thread SS

Sourced to meet exact factory performance standards, this specialized shoulder bolt is a critical mechanical fastener used in the internal drive, roller, or guide assemblies of the Tommy Car Wash Systems Flat Mat Washer. In high-volume car wash environments, mat washers are subject to continuous water exposure, aggressive detergents, and constant physical cycling. Standard bolts risk rust, binding, or thread stripping, leading to costly equipment jams. This premium socket-head shoulder bolt features an unthreaded, precision-ground shoulder that acts as a smooth shaft or pivot point, allowing rotating components to spin freely with minimal friction while securely locking the assembly together.

Key features and benefits include:

• Tommy Flat Mat Washer Direct Fit: Engineered to the precise mechanical specifications required for the internal roller brackets and pivoting tracking arms of Tommy automated mat washers.
• Precision Shoulder Design: The 3/8" diameter unthreaded shoulder provides a smooth, concentric bearing surface that reduces friction and allows components to rotate freely without binding.
• Premium Stainless Steel Construction: Forged from high-grade, marine-ready stainless steel. It is completely immune to rust, scale, and corrosion caused by continuous water spray and harsh mat-cleaning chemistry.
• High-Torque Allen Socket Drive: Features a clean, deep hex socket head that ensures maximum torque transmission during installation and prevents stripping, allowing for fast servicing with standard Allen keys.
• Thread Integrity and Stability: The 5/16"-18 coarse thread profile provides exceptional holding power, locking into frame nuts or tapped holes to prevent loosening under heavy operational vibrations.