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This series features a molded race compound designed to provide low friction, low moisture absorbing properties.
  • Body - Low carbon steel, protective coated for corrosion resistance.
  • Ball - Alloy steel, heat treated, hard chrome plated.
  • Race - Molded, self-lubricating, reinforced Nylon.
  • Studded configuration available upon request. Specify by adding suffix "S". Ex.: SPM-8S.
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Item #

Thread Type

B - Ball Bore

W - Ball Width

H - Head Width

A - Base to Center

D - Head Diameter

C - Thread Length

Thread Size

Ultimate Radial Static Load Capacity

SPM-3 N/A Right Hand N/A .1900 in N/A .312 in N/A .250 in N/A 1.250 in N/A .625 in N/A .750 in N/A 10-32 N/A 1,210 lbs
SPB-3 N/A Left Hand N/A .1900 in N/A .312 in N/A .250 in N/A 1.250 in N/A .625 in N/A .750 in N/A 10-32 N/A 1,210 lbs
SPM-4 N/A Right Hand N/A .2500 in N/A .375 in N/A .281 in N/A 1.562 in N/A .750 in N/A 1.000 in N/A 1/4-28 N/A 2,470 lbs
SPB-4 N/A Left Hand N/A .2500 in N/A .375 in N/A .281 in N/A 1.562 in N/A .750 in N/A 1.000 in N/A 1/4-28 N/A 2,470 lbs
SPM-5 N/A Right Hand N/A .3125 in N/A .437 in N/A .344 in N/A 1.875 in N/A .875 in N/A 1.250 in N/A 5/16-24 N/A 2,740 lbs
SPB-5 N/A Left Hand N/A .3125 in N/A .437 in N/A .344 in N/A 1.875 in N/A .875 in N/A 1.250 in N/A 5/16-24 N/A 2,740 lbs
SPM-6 N/A Right Hand N/A .3750 in N/A .500 in N/A .406 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A 4,210 lbs
SPB-6 N/A Left Hand N/A .3750 in N/A .500 in N/A .406 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A 4,210 lbs
SPM-7 N/A Right Hand N/A .4375 in N/A .562 in N/A .437 in N/A 2.125 in N/A 1.125 in N/A 1.312 in N/A 7/16-20 N/A 5,350 lbs
SPB-7 N/A Left Hand N/A .4375 in N/A .562 in N/A .437 in N/A 2.125 in N/A 1.125 in N/A 1.312 in N/A 7/16-20 N/A 5,350 lbs
SPM-8 N/A Right Hand N/A .5000 in N/A .625 in N/A .500 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A 6,430 lbs
SPB-8 N/A Left Hand N/A .5000 in N/A .625 in N/A .500 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A 6,430 lbs
SPM-10 N/A Right Hand N/A .6250 in N/A .750 in N/A .562 in N/A 2.625 in N/A 1.500 in N/A 1.625 in N/A 5/8-18 N/A 8,300 lbs
SPB-10 N/A Left Hand N/A .6250 in N/A .750 in N/A .562 in N/A 2.625 in N/A 1.500 in N/A 1.625 in N/A 5/8-18 N/A 8,300 lbs
SPM-12 N/A Right Hand N/A .7500 in N/A .875 in N/A .687 in N/A 2.875 in N/A 1.750 in N/A 1.750 in N/A 3/4-16 N/A 10,900 lbs
SPB-12 N/A Left Hand N/A .7500 in N/A .875 in N/A .687 in N/A 2.875 in N/A 1.750 in N/A 1.750 in N/A 3/4-16 N/A 10,900 lbs
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