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What Size Locking Hitch Pin Fits Different Class Trailer Hitches


Can you tell me the size diameter of a receiver lock?


Helpful Expert Reply:

On a Class I or II 1-1/4 inch trailer hitch you will need to use a 1/2 inch hitch lock such as # e98879. This lock has a 2 inch span which is the usable length of the pin. I have included a link to a video review for you.

For a Class III or IV 2 inch trailer hitch as well as Class V 2-1/2 inch trailer hitches you will need to use a 5/8 inch diameter pin such as # e98881 which has a span of 3-5/8 inches. I have included a link to a video review of this lock as well.

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Follow up Questions


I have a 2" hitch with a 2" hitch receiver that is just too shallow by less than 1/8". A 5/8" diameter hitch pin won't fit, but a 1/2" diameter pin does (with a tiny bit of wiggle room). Is it safe to use a 1/2" diameter hitch pin lock with a class III 2" hitch, given my scenario?

Etrailer Expert
Reply from Chris R.

If the hitch pin hole on your receiver is too small for a 5/8" pin you don't really have a choice other than enlarging it a bit with a drill. You can use a 1/2" pin if it fits correctly but you may want to add an anti-rattle device like the Roadmaster # RM-061 to stabilize the connection.

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