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Spacers by Hole Size

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  1. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 21/64 Long

    Aluminum Spacer 1/2 OD x .319 ID x 21/64 Long

    $0.99 As low as: $0.128

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  2. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 11/32 Long

    Aluminum Spacer 1/2 OD x .319 ID x 11/32 Long

    $0.92 As low as: $0.119

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  3. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x 9mm Long

    Aluminum Spacer 1/2 OD x .319 ID x 9mm Long

    $0.92 As low as: $0.131

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  4. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 3/8 Long

    Aluminum Spacer 1/2 OD x .319 ID x 3/8 Long

    $0.86 As low as: $0.112

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  5. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x .380 Long

    Aluminum Spacer 1/2 OD x .319 ID x .380 Long

    $0.60 As low as: $0.07

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  6. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x 10mm Long

    Aluminum Spacer 1/2 OD x .319 ID x 10mm Long

    $0.89 As low as: $0.115

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  7. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x 10mm Long

    Aluminum Spacer 1/2 OD x .319 ID x 10mm Long - Black Anodized

    $4.74 As low as: $0.371

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  8. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x .403 Long

    Aluminum Spacer 1/2 OD x .319 ID x .403 Long

    $1.07 As low as: $0.103

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  9. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x .405 Long

    Aluminum Spacer 1/2 OD x .319 ID x .405 Long

    $1.50 As low as: $0.36

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  10. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 13/32 Long

    Aluminum Spacer 1/2 OD x .319 ID x 13/32 Long

    $0.97 As low as: $0.127

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  11. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 7/16 Long

    Aluminum Spacer 1/2 OD x .319 ID x 7/16 Long

    $0.91 As low as: $0.118

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  12. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x .450 Long

    Aluminum Spacer 1/2 OD x .319 ID x .450 Long

    $0.96 As low as: $0.13

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  13. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 15/32 Long

    Aluminum Spacer 1/2 OD x .319 ID x 15/32 Long

    $1.03 As low as: $0.134

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  14. Aluminum Spacer 1/2 OD x .328 ID x .475 Long

    Aluminum Spacer 1/2 OD x .328 ID x .475 Long

    $1.57 As low as: $0.22

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  15. Aluminum Spacer 1/2 OD x .279 ID x 15/32 Long

    Aluminum Spacer 1/2 OD x .279 ID x 15/32 Long

    $1.52 As low as: $0.51

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  16. Steel Spacer 1/2 OD x .325ID x 1/2 Long

    Steel Spacer 1/2 OD x .325ID x 1/2 Long

    $2.16 As low as: $0.344

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  17. Aluminum Spacer 1/2 OD x .319 ID x 1/2 Long

    Aluminum Spacer 1/2 OD x .319 ID x 1/2 Long

    $0.87 As low as: $0.112

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  18. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 17/32 Long

    Aluminum Spacer 1/2 OD x .319 ID x 17/32 Long

    $1.18 As low as: $0.153

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  19. Aluminum Spacer 1/2 OD x .326 ID x 17/32 Long

    Aluminum Spacer 1/2 OD x .326 ID x 17/32 Long

    $1.32 As low as: $0.44

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  20. Aluminum Spacer 1/2 OD x 8mm or 5/16 ID x 14M Long

    Aluminum Spacer 1/2 OD x .319 ID x 14M Long

    $1.20 As low as: $0.139

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  21. Aluminum Spacer 1/2 OD x .319 ID x 14.1M Long

    Aluminum Spacer 1/2 OD x .319 ID x 14.1M Long

    $1.20 As low as: $0.53

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  22. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 9/16 Long

    Aluminum Spacer 1/2 OD x .319 ID x 9/16 Long

    $1.11 As low as: $0.144

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  23. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 5/8 Long

    Aluminum Spacer 1/2 OD x .319 ID x 5/8 Long

    $1.06 As low as: $0.138

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  24. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 11/16 Long

    Aluminum Spacer 1/2 OD x .319 ID x 11/16 Long

    $1.22 As low as: $0.159

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  25. Aluminum Spacer 1/2 OD x 5/16 or 8mm ID x 3/4 Long

    Aluminum Spacer 1/2 OD x .319 ID x 3/4 Long

    $1.07 As low as: $0.139

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  1. Category: Hole for 5/16" Bolts Remove This Item
  2. Outer Diameter: 1/2 in.---------12.7mm Remove This Item
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Bolt Hole Size / Inner DIameter
  1. For 5/16" or 8mm Bolts (53)
  2. For 5/16 or 8mm Loose fit (10)
Length Decimal/Fraction/Metric
  1. 0.078 in.----5/64---1.97mm (1)
  2. 0.094 in.----3/32---2.38mm (1)
  3. 0.118 in.-------------3mm (2)
  4. 0.125 in.-----1/8----3.18mm (1)
  5. 0.141 in.----9/64---3.58mm (3)
  6. 0.156 in.----5/32---3.96mm (1)
  7. 0.172 in.---11/64---4.37mm (1)
  8. 0.1875 in.---3/16---4.76mm (1)
  9. 0.203 in.---13/64---5.16mm (1)
  10. 0.208 in.-------------5.28mm (1)
  11. 0.219 in.----7/32----5.56mm (1)
  12. 0.225 in.-------------5.72mm (1)
  13. 0.2345 in.--15/64--5.95mm (1)
  14. 0.250 in.-----1/4----6.35mm (2)
  15. 0.260 in.----------- (1)
  16. 0.2655 in.--17/64--6.75mm (1)
  17. 0.281 in.----9/32---7.14mm (1)
  18. 0.297 in.---19/64---7.54mm (2)
  19. 0.3125 in.---5/16---7.94mm (2)
  20. 0.328 in.---21/64---8.33mm (1)
  21. 0.344 in.---11/32---8.74mm (1)
  22. 0.354 in.-------------9mm (1)
  23. 0.375 in.-----3/8----9.53mm (1)
  24. 0.380 in.-------------9.65mm (1)
  25. 0.394 in.-------------10mm (2)
  26. 0.403 in.-------------10.24mm (1)
  27. 0.405 in.-------------10.28mm (1)
  28. 0.406 in.---13/32---10.31mm (1)
  29. 0.4375 in.---7/16---11.11mm (1)
  30. 0.450 in.-------------11.43mm (1)
  31. 0.469 in.---15/32---11.91mm (2)
  32. 0.475 in.----------- (1)
  33. 0.500 in.-----1/2----12.7mm (2)
  34. 0.531 in.---17/32---13.49mm (2)
  35. 0.551 in.-------------14mm (1)
  36. 0.555 in.-------------14.1mm (1)
  37. 0.5625 in.---9/16---14.29mm (1)
  38. 0.625 in.-----5/8----15.88mm (1)
  39. 0.6875 in.--11/16--17.46mm- (1)
  40. 0.750 in.----3/4-----19.05mm (1)
  41. 0.788 in.-------------20mm (1)
  42. 0.8125 in.--13/16--20.64mm (1)
  43. 0.875 in.----7/8-----22.23mm (1)
  44. 0.9375 in.--15/16--23.81mm (1)
  45. 1 inch---------1-----25.4mm (1)
  46. 1.0625 in.-1-1/16--27mm- (1)
  47. 1.125 in.---1-1/8---28.58mm (1)
  48. 1.156 in.--1-5/32---29.36mm (1)
  49. 1.1875 in.--1-3/16-30.16mm (1)
  50. 1.250 in.---1-1/4---31.75mm (1)
  51. 1.3125 in.-1-5/16--33.34mm (1)
  52. 1.375 in.---1-3/8---34.93mm (1)
  53. 1.4375 in.--1-7/16-36.51mm (1)
  54. 1.500 in.---1-1/2---38.1mm (1)
Metal Alloy
  1. Aluminum 6061-T6 (61)
  2. Steel (3)
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