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Need help interpreting nut sizes from Manual

Discussion in 'Mechanic and Repair' started by HashBrown007, Oct 19, 2007.

  1. HashBrown007

    HashBrown007 LawnSite Member
    Messages: 19

    I'm fairly adept at using my hand tools, but I'm having some trouble determining the 'standard' size of two fittings.

    Put simply:
    What size ratchet heads should I be looking for when I go to Home Depot

    Nut Sizes.jpg

    Nut Sizes.jpg
  2. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,168

    I am not sure what you are saying, are you looking for the size socket to fit a 3/4" nut? This chart will tell you what fits what.

  3. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Messages: 963

    As a rule of the thumb, you add 50% to the nominal thread size and round up to the nearest 1/16" IF NECESSARY.
    Not everyone uses rules or has thumbs tho- :)
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Get a full set of both standard and metric sockets and wrenches, Then you will have what you need for any project that pops up.

    What brand unit is that with a listing like that for nothing more than a screw/nut ? :dizzy:
  5. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,168

    It is a Hustler parts manual , if he will go down this list I showed him the decimal size conversions.

    Using this manual

    Carriage Bolt
    Clevis Pin
    Cotter Pin
    Cap Screw
    Cup Washer
    Fender Washer
    Flat Washer
    Hex Head
    Lock Washer
    Machine Bushing
    Machine Screw
    Self Tapping Cap Screw
    Socket Head
    Shoulder Bolt
    Set Screw
    Outside Diameter
    Inside Diameter


    Standard Torques
    The following chart lists the standard torque values for the threaded fasteners found in this manual. Torque all cap
    screws, nuts and set screws to these values unless a different torque is shown in the Notes section next to the fastener.
    Loctite® 592 to be used on all pipe threads.
    Lubricate all grease zerks.

    The first number next to the decimal sizes is the torque value in ft. lbs.

    1/4" = .250 8.2 11.1 M3 1 1.3
    5/16" = .312 17 23 M4 2.2 3
    3/8" = .375 30 40 M5 4.5 6.1
    7/16" = .438 48 65 M6 7.7 10.4
    1/2" = .500 73 99 M8 18.5 25
    9/16" = .562 105 143 M10 37 50
    5/8" = .625 145 200 M12 64 87
    3/4" = .750 260 350 M14 80 108.5
    7/8" = .875 420 565 M16 160 215
    1/0" = 1.00 625 850 M20 320 435
    M24 555 750
    106575 7/06 2-1
  6. HashBrown007

    HashBrown007 LawnSite Member
    Messages: 19

    You ain't kiddin'. Looking at those specs made me feel like a noob. I mean, that's not the standard practice in listing measurments.. as far as I've seen. Am I even slightly justified for not knowing how to interpret them?

    Thanks for that. The link you provided is still loading as I type this. This list explains alot. Thanks
  7. HashBrown007

    HashBrown007 LawnSite Member
    Messages: 19

    For Item# 13, what is STR-8MORB? The manual doesn't explain it anywhere
  8. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    I think you might want to get up into the machine to ID these things...

    At least one of them looks to be a HEX plug, the other I'm not sure, why'd they refer to a nut by 'HX,' wth they don't make but 6-sided nuts... Yeah, I'd be all for getting up under there and taking a good look, matter of fact you might want to get into the repair and be ready to drive to the store with the parts in hand so you can match it up, that's really the only way to be sure.
  9. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,168

    Right here is what they are talking about, STR is the second one in from the left.

  10. puppypaws

    puppypaws LawnSite Fanatic
    Messages: 9,168

    This is the reason they call it "HX" because a hexagon is six sides!


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