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1/8" X 1" Stainless Prong Cotter Pin
The Fastenal 1/2" 18-8 Stainless Steel Split Lock Washer (Fastenal #74210) is a high-grade mechanical locking fastener used extensively across Tommy Car Wash Systems tunnel equipment.
Designed to prevent threaded fasteners from loosening under heavy vibration, thermal expansion, and mechanical shock, this helical spring lock washer applies continuous spring tension against the bolt head or nut. Engineered from 18-8 (304) stainless steel, this cotter pin provides exceptional corrosion resistance against constant exposure to reclaimed water, high-pressure spray, pre-soak chemicals, and harsh tunnel detergents. Whether installed on conveyor framework, drive motor mounts, chemical arches, or pit hardware, these split lock washers ensure structural connections remain rigid and secure during high-throughput car wash operations.
Key features and benefits include:
- 18-8 (304) Stainless Steel Construction: Maximum protection against rust, oxidation, and aggressive car wash chemical runoff.
- Helical Spring Tension: Deflects under tightening torque to maintain constant tension on threaded assemblies, preventing backlash and loosening caused by equipment vibration.
- Universal 1/2" Fit: Standard sizing compatible with all 1/2"-13 hex cap screws, carriage bolts, and threaded rods used across Tommy equipment.
- Industrial Fastening Standard: Meets ASME B18.21.1 dimensional specifications for helical spring lock washers.
- OEM Maintenance Essential: Ideal for routine equipment servicing, hardware replacements, and structural tunnel retrofits.
- Diameter: 1/8"
- Grade:18-8"
- Length: 1"
- Material: Stainless Steel
- Style: Extended Prong
- Type: Cotter Pin
- Proper Placement: Position the split lock washer directly underneath the nut or bolt head, ensuring the split edges bite into the mating surfaces as torque is applied.
- Torque Check: Tighten the bolt to the recommended torque spec for 1/2" stainless fasteners until the lock washer compresses fully flat.
- Single-Use Best Practice: Always replace split lock washers during hardware servicing, as previously compressed helical springs lose tension elasticity once unbolted.