These heavy-duty D-type safety locking pins are made of high-strength carbon steel with full zinc galvanized coating, designed for secure locking of trailer hitches, farm machinery, lawn equipment, boat tow parts and industrial tools. The built-in spring retainer wire prevents accidental pin drop-out during vibration, bumpy travel or heavy load operation. This bulk set contains 10 identical pins for multi-equipment replacement and backup.
Core Product Features
- Constructed from solid thick carbon steel with uniform zinc electroplated finish. The smooth chrome-silver surface delivers excellent rust, corrosion and oxidation resistance, suitable for outdoor wet farm, marine and road towing environments. Thickened pin shaft offers strong shear resistance under heavy tension without bending or breaking.High-Strength Carbon Steel & Anti-Rust Zinc Plating
- Built-in flexible circular spring wire clip forms a closed D-loop after installation. It automatically locks the pin in place to stop sliding out from holes caused by vehicle shaking, road vibration or machinery operation. No extra separate cotter pins required; one-piece structure saves assembly time.Integrated Spring Retainer D-Lock Design
- Standard Universal Size (5mm × 30mm)
- Pin shaft diameter: 5mm
- Effective working length: 30mm
- Standard common size compatible with most trailer couplers, tractor jack legs, PTO shafts, lawn mower frames, saw machinery and boat trailer pintle hooks.Spring wire thickness: 2.2mm
- Simply squeeze the spring wire loop to compress the D-ring, slide the pin through the aligned mounting holes, then release the wire to self-lock firmly. Quick to detach for maintenance, equipment switching or seasonal storage without special tools.Easy One-Hand Installation & Removal
- Wide Cross-Industry Compatibility
- Towing & Vehicles: Trailer hitches, truck tow hooks, boat trailer frames, jack support legs
- Farm & Garden: Tractors, lawn mowers, ATV attachments, agricultural PTO equipment
- Industrial Hardware: Table saws, workshop machinery, tool fixture locks, construction gear
Specifications
- Material: High-strength carbon steel, zinc galvanized anti-rust coating
- Size: Shaft 5mm diameter × 30mm usable length
- Lock Type: Built-in spring D-shaped retainer wire
- Package Quantity: 10 pieces per set
- Main Use: Safety locking for trailers, farm equipment, boats, lawn machinery, industrial tools
What's in the box
10 x Trailer Hitch Pin
