1/4" (6.35mm) Outer Diameter

Shopping Options

Outer Diameter

1. 7/32 in.--------5.56mm (2)
2. 1/4 in.----------6.35mm (138)

Bolt Hole Size / Inner DIameter

1. For #2 or 2mm Screws (1)
2. For #4 Screws (22)
3. For 3mm or #4 Screws (20)
4. For #6 or 3mm Screws (36)
5. .156 in (3.96mm) (2)
6. For #8 or 4mm Screws (36)
7. For #10 Screws (16)
8. For 5mm or #10 Screws (4)

Length Decimal/Fraction/Metric

1. 0.0625 in.---1/16--1.59mm (1)
2. 0.079 in.-------------2mm (1)
3. 0.1095 in.---7/64---2.77mm (1)
4. 0.118 in.-------------3mm (1)
5. 0.125 in.-----1/8----3.18mm (7)
6. 0.141 in.----9/64---3.58mm (2)
7. 0.156 in.----5/32---3.96mm (5)
8. 0.1575 in.-----------4mm (1)
9. 0.160 in.-------------4.06mm (1)
10. 0.172 in.---11/64---4.37mm (4)
11. 0.177 in.-------------4.5mm (1)
12. 0.1875 in.---3/16---4.76mm (4)
13. 0.197 in.-------------5mm (2)
14. 0.203 in.---13/64---5.16mm (2)
15. 0.208 in.-------------5.28mm (1)
16. 0.219 in.----7/32----5.56mm (3)
17. 0.225 in.-------------5.72mm (1)
18. 0.2345 in.--15/64--5.95mm (2)
19. 0.236 in.-------------6mm (2)
20. 0.250 in.-----1/4----6.35mm (5)
21. 0.2655 in.--17/64--6.75mm (1)
22. 0.2755 in.-----------7mm (1)
23. 0.281 in.----9/32---7.14mm (4)
24. 0.291 in.------------7.4mm (1)
25. 0.297 in.---19/64---7.54mm (1)
26. 0.3125 in.---5/16---7.94mm (6)
27. 0.315 in.-------------8mm (2)
28. 0.328 in.---21/64---8.33mm (2)
29. 0.344 in.---11/32---8.74mm (3)
30. 0.350 in.-------------8.89mm (1)
31. 0.354 in.-------------9mm (2)
32. 0.375 in.-----3/8----9.53mm (5)
33. 0.380 in.-------------9.65mm (1)
34. 0.394 in.-------------10mm (1)
35. 0.400 in.-------------10.15mm (1)
36. 0.402 in.-------------10.21mm (1)
37. 0.406 in.---13/32---10.31mm (4)
38. 0.433 in.-------------11mm (1)
39. 0.4375 in.---7/16---11.11mm (4)
40. 0.453 in.---29/64---11.5mm (1)
41. 0.469 in.---15/32---11.91mm (3)
42. 0.472 in.-------------12mm (1)
43. 0.4844 in.--31/64--12.3mm (1)
44. 0.490 in.-------------12.45mm (1)
45. 0.500 in.-----1/2----12.7mm (4)
46. 0.500 in.-----1/2----12.7mm (1)
47. 0.531 in.---17/32---13.49mm (2)
48. 0.547 in.---35/64---13.89mm (1)
49. 0.551 in.-------------14mm (1)
50. 0.5625 in.---9/16---14.29mm (3)
51. 0.578 in.--37/64--14.68mm (1)
52. 0.591 in.-------------15mm (1)
53. 0.600 in.-------------15.24mm (1)
54. 0.625 in.-----5/8----15.88mm (5)
55. 0.6875 in.--11/16--17.46mm- (3)
56. 0.719 in.---23/32---18.26mm (2)
57. 0.750 in.----3/4-----19.05mm (3)
58. 0.800 in.----------- (1)
59. 0.8125 in.--13/16--20.64mm (2)
60. 0.820 in.-------------20.83mm (1)
61. 0.827 in.-------------21mm (1)
62. 0.844 in.---27/32---21.43mm (1)
63. 0.8595 in.--55/64--21.82mm (1)
64. 0.875 in.----7/8-----22.23mm (2)
65. 0.886 in.-------------22.5mm) (1)
66. 0.9375 in.--15/16--23.81mm (2)
67. 1 inch---------1-----25.4mm (4)