Trimax Receiver Hitch Lock Pins: 5/8-Inch Diameter & Span Guide

Trimax 5/8-Inch Receiver Locks: Compare Pin Span and Material

Choosing a hitch receiver lock is not just a matter of selecting a 5/8-inch pin. The usable distance between the pin's retaining ends also has to span your receiver and installed accessory. These five Trimax locking pins offer different spans, materials and lock shapes to suit different mounting arrangements.

Three checks before buying a receiver lock

Measure the pin hole

These models all use a nominal 5/8-inch diameter pin. Make sure the receiver and installed shank use a correctly aligned 5/8-inch pin hole; never force a larger pin into a smaller opening.

Check the required clear span

Measure the distance the pin must cross when the hitch insert is installed, including the receiver wall and any sleeve or other permitted fitting. Compare this with the manufacturer's usable locking span.

Choose a locking style

Compare keyed bent pins, straight barbell-style pins and stainless versus coated steel construction. Verify clearance for the lock head, keys and any vehicle bodywork.

Length terminology: The dimensions below are the manufacturer's listed usable spans, not the lock's complete end-to-end length or a universal fitment guarantee. Receiver class alone does not determine whether a specific pin is long enough.

Five Trimax receiver-lock MPNs compared

Manufacturer part Pin diameter Usable span Lock style Material / finish
SXT3 5/8 in 2¾ in Stainless steel locking pin Stainless steel
T3BLACK 5/8 in 2¾ in Black locking pin Powder-coated hardened steel
TR200 5/8 in 3½ in Bent locking pin Chrome-plated steel
SXT5 5/8 in 3½ in Stainless steel wide-span pin Stainless steel
TH4 5/8 in 4⅜ in Extra-long steel lock Steel

How to choose between the spans

2¾-inch span: SXT3 is the stainless-steel option and T3BLACK uses a black powder-coated steel design. They share the listed span but not the same construction or finish.

3½-inch span: TR200 uses a keyed bent-pin shape and chrome-plated steel. SXT5 offers the wider span in stainless steel. Compare the surrounding clearance before choosing between them.

4⅜-inch span: TH4 is the extra-long steel keyed receiver lock. Its greater length does not by itself confirm the correct fit for every wide receiver or accessory.

Stainless steel versus coated steel

Trimax specifies stainless steel for the SXT3 and SXT5. TR200 uses a chrome-plated steel bent pin, while T3BLACK has a black powder-coated finish over steel. These are different part numbers, not interchangeable finishes on a single SKU. Where the hitch is exposed to road salt or moisture, consider the material and the lock manufacturer's care instructions.

Find the matching Trimax lock

Check the installed lock before towing

Install the hitch accessory and pin in accordance with the hitch, vehicle and lock manufacturers' instructions. Confirm that the pin is fully seated, the lock is positively engaged, and there is enough clearance around the receiver for the mechanism. Follow the specified towing limits for the complete hitch system; a locking pin's description does not raise the rated capacity of the vehicle or hitch.

For other receiver-pin styles, compare our CURT hitch pin and clip selection guide or Bulldog receiver and coupler locks guide.

Common questions

What is the difference between pin diameter and span?

Diameter is the thickness of the pin that passes through the aligned receiver holes. Span is the usable length available between the retaining ends. Both must suit the connection.

Will every 5/8-inch locking pin fit a Class V receiver?

No. Confirm the required usable span and lock-head clearance as well as the pin-hole diameter. Receivers and accessories can have different overall widths.

Are SXT3 and T3BLACK the same lock?

No. Both list a 2¾-inch span, but SXT3 is stainless steel and T3BLACK is a black powder-coated steel product.

Is a 4⅜-inch pin always a better choice?

Not necessarily. Use the length the hitch and accessory manufacturers specify, accounting for proper engagement and clearance. Extra length is not automatically a fit improvement.

Quick part links: SXT3 · T3BLACK · TR200 · SXT5 · TH4

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