1/2" (12.7mm) Outer Diameter

Shopping Options

Bolt Hole Size / Inner DIameter

1. For #10 Screws (23)
2. For 5mm or #10 Screws (3)
3. For #12 or 5mm Screws (1)
4. For 6mm or #12 Screws (24)
5. For 1/4" or 6mm Bolts (55)
6. For 5/16" or 8mm Bolts (50)
7. For 5/16 or 8mm Loose fit (10)
8. For 3/8" Bolts (38)
9. For 10mm or 3/8" Bolts (3)
10. For 7/16" Bolts (1)

Length Decimal/Fraction/Metric

1. 0.094 in.----3/32---2.38mm (1)
2. 0.100 in.-------------2.54mm (2)
3. 0.118 in.-------------3mm (3)
4. 0.125 in.-----1/8----3.18mm (5)
5. 0.141 in.----9/64---3.58mm (5)
6. 0.156 in.----5/32---3.96mm (5)
7. 0.1575 in.-----------4mm (1)
8. 0.172 in.---11/64---4.37mm (3)
9. 0.1875 in.---3/16---4.76mm (4)
10. 0.197 in.-------------5mm (1)
11. 0.203 in.---13/64---5.16mm (2)
12. 0.208 in.-------------5.28mm (1)
13. 0.219 in.----7/32----5.56mm (4)
14. 0.225 in.-------------5.72mm (2)
15. 0.2345 in.--15/64--5.95mm (2)
16. 0.236 in.-------------6mm (1)
17. 0.250 in.-----1/4----6.35mm (5)
18. 0.260 in.----------- (1)
19. 0.2655 in.--17/64--6.75mm (2)
20. 0.2755 in.-----------7mm (1)
21. 0.281 in.----9/32---7.14mm (3)
22. 0.297 in.---19/64---7.54mm (4)
23. 0.3125 in.---5/16---7.94mm (5)
24. 0.315 in.-------------8mm (1)
25. 0.328 in.---21/64---8.33mm (2)
26. 0.344 in.---11/32---8.74mm (4)
27. 0.354 in.-------------9mm (2)
28. 0.375 in.-----3/8----9.53mm (5)
29. 0.380 in.-------------9.65mm (1)
30. 0.394 in.-------------10mm (4)
31. 0.402 in.----------- (1)
32. 0.405 in.-------------10.28mm (1)
33. 0.406 in.---13/32---10.31mm (4)
34. 0.433 in.-------------11mm (1)
35. 0.4375 in.---7/16---11.11mm (5)
36. 0.450 in.-------------11.43mm (1)
37. 0.469 in.---15/32---11.91mm (5)
38. 0.472 in.-------------12mm (1)
39. 0.475 in.----------- (1)
40. 0.4844 in.--31/64--12.3mm (1)
41. 0.500 in.-----1/2----12.7mm (7)
42. 0.505 in.-------------12.83mm (1)
43. 0.510 in.-------------12.95mm (1)
44. 0.512 in.-------------13mm (1)
45. 0.531 in.---17/32---13.49mm (4)
46. 0.551 in.-------------14mm (1)
47. 0.555 in.-------------14.1mm (1)
48. 0.5625 in.---9/16---14.29mm (4)
49. 0.601 in.----------- (1)
50. 0.625 in.-----5/8----15.88mm (4)
51. 0.669 in.-------------17mm (1)
52. 0.6875 in.--11/16--17.46mm- (4)
53. 0.748 in.-------------19mm (1)
54. 0.750 in.----3/4-----19.05mm (5)
55. 0.788 in.-------------20mm (1)
56. 0.8125 in.--13/16--20.64mm (3)
57. 0.875 in.----7/8-----22.23mm (6)
58. 0.906 in.---29/32---23.02mm (2)
59. 0.9375 in.--15/16--23.81mm (4)
60. 0.984 in.-------------25mm (1)
61. 1 inch---------1-----25.4mm (8)
62. 1.010 in.-------------25.65mm (1)
63. 1.024 in.-------------26mm (3)
64. 1.0625 in.-1-1/16--27mm- (3)
65. 1.103 in.-------------28mm (1)
66. 1.125 in.---1-1/8---28.58mm (3)
67. 1.156 in.--1-5/32---29.36mm (1)
68. 1.181 in.-------------30mm (3)
69. 1.1875 in.--1-3/16-30.16mm (3)
70. 1.200 in------------ (1)
71. 1.250 in.---1-1/4---31.75mm (4)
72. 1.260 in.-------------32mm (1)
73. 1.299 in.-------------33mm (1)
74. 1.3125 in.-1-5/16--33.34mm (3)
75. 1.375 in.---1-3/8---34.93mm (3)
76. 1.378 in.-------------35mm (2)
77. 1.400 in.-------------35.55mm (2)
78. 1.418 in.-------------36mm (1)
79. 1.4375 in.--1-7/16-36.51mm (3)
80. 1.4845 in.-1-31/64-37.70mm (1)
81. 1.500 in.---1-1/2---38.1mm (3)
82. 1.575 in.-------------40mm (1)
83. 1.654 in.-------------42mm (1)

Metal Alloy

1. Aluminum 6061-T6 (201)
2. Steel (4)
3. Steel (zinc plated) (1)
4. Brass (2)
5. Stainless Steel 303/18-8 (1)