1/2" (12.7mm) Outer Diameter

Shopping Options

Bolt Hole Size / Inner DIameter

1. For #10 Screws (10)
2. For 1/4" or 6mm Bolts (27)
3. For 5/16" or 8mm Bolts (17)
4. For 3/8" Bolts (15)

Thread

1. 1/4-20 (6)

Length Decimal/Fraction/Metric

1. 0.100 in.-------------2.54mm (1)
2. 0.125 in.-----1/8----3.18mm (4)
3. 0.1875 in.---3/16---4.76mm (5)
4. 0.219 in.----7/32----5.56mm (1)
5. 0.250 in.-----1/4----6.35mm (6)
6. 0.3125 in.---5/16---7.94mm (4)
7. 0.344 in.---11/32---8.74mm (1)
8. 0.375 in.-----3/8----9.53mm (5)
9. 0.4375 in.---7/16---11.11mm (5)
10. 0.469 in.---15/32---11.91mm (1)
11. 0.500 in.-----1/2----12.7mm (4)
12. 0.5625 in.---9/16---14.29mm (2)
13. 0.625 in.-----5/8----15.88mm (5)
14. 0.750 in.----3/4-----19.05mm (6)
15. 0.8125 in.--13/16--20.64mm (1)
16. 0.875 in.----7/8-----22.23mm (4)
17. 1 inch---------1-----25.4mm (4)
18. 1.0625 in.-1-1/16--27mm- (2)
19. 1.125 in.---1-1/8---28.58mm (3)
20. 1.250 in.---1-1/4---31.75mm (3)
21. 1.375 in.---1-3/8---34.93mm (4)
22. 1.500 in.---1-1/2---38.1mm (4)