This nut set is only applicable to M6 bolts. They are: 20PCS M6 x 11, 18PCS M6 x 12, 15PCS M6 x 13, 14PCS M6 x 15 and 5PCS M6 x 20. Product Feature: These slotted nuts can be used in conjunction with connecting bolts to better fix beds or chairs;.
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