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  1. #1
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    Default What 'grade' are hitchpins?

    I am thinking of making some hitchpins that are longer than commercially available and it occurred to me that they might be hardened as in grade 5 or grade 8 or whatever. It never got thought about but I just assumed they were just cold rolled steel as in grade 2. Seems a harder grade would tear apart the drawbar hole that would likely be just plain old barstock and grade 2 ? Anyone have any ideas about this?
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  2. #2
    Super Member RickB's Avatar
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    Default Re: What 'grade' are hitchpins?

    Drawpin hardness varies more or less with price. Generally, yellow zinc plated pins are soft and those with black oxide fiinish are quite a bit harder. How soft, how hard? Can't answer definitively.
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  3. #3
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    Default Re: What 'grade' are hitchpins?

    I think the softest hitch pins are Gr4 -- the ones with the swinging handles. I prefer that form, altho I wouldnt mind them being harder like the ones with red or blue rigid handles.
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  4. #4
    Platinum Member tessiers's Avatar
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    Default Re: What 'grade' are hitchpins?

    good ones are definately hard, twisted more yellow pins into pretzels than I can count. A325 bolts work pretty good, they are better than the yellow pins, mild steel will not hold up to heavy use. I haul baler and hay wagon, or chopper and forage wagon. Mild steel may be OK if you are hauling a small implement or something light.
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  5. #5
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    Default Re: What 'grade' are hitchpins?

    The black pins with solid red rubber coated handles are usually grade 5. They are available in a variety of lengths.
    Hitch Pin, 1 in. dia. x 7-1/2 in. Usable Length - 0269078 | Tractor Supply Company
    It looks like the yellow ones are grade 2+
    Hitch Pin, 3/4 in. dia. x 6-1/4 in. Usable Length - 0268828 | Tractor Supply Company
    2006 Kama 554, 92 Belarus 250AS, Bombardier Outlander Max 400.

  6. #6
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    Default Re: What 'grade' are hitchpins?

    I weld a 1.5" lock washer on the head of a grade 8 or a Supertanium bolt to make a hitch pin. We have bent others but never my homemade pins.

  7. #7
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    Default Re: What 'grade' are hitchpins?

    Quote Originally Posted by strum456 View Post
    I weld a 1.5" lock washer on the head of a grade 8 or a Supertanium bolt to make a hitch pin. We have bent others but never my homemade pins.
    I don't mind using a harder grade such as an 8 but I pull heavier tillage things that slop around or bounce and don't want to destroy my drawbar in an afternoon. If that black TSC pin shown above (and below) is grade 5 i guess that's what to go with?
    http://www.tractorsupply.com/hitch-p...length-0269078
    Any thoughts now?
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  8. #8
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    Default Re: What 'grade' are hitchpins?

    My dad has had the same drawbar on his tractor for 50 years and he uses grade 8 pins.

  9. #9
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    Default Re: What 'grade' are hitchpins?

    probably something like 4140 chromoly would be good, it is stronger than mild steel, but not all that hard. 4140L if I remember right has lead in it and is a little easier to machine and probably even softer.

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