Product Review

Size:
Internal Thread Size: 5/16"-18; Nut External Diameter: 12mm, Length: 15mm

How to Use:
1. Pre-drill, drill a well-sized hole first with tools, the following is drilling specification reference, when the material is high-hardness, please enlarge the hole.
1/4"-20x15mm, Suggest that the diameter of the hole is 9.6 +/- 0.2mm, the length is about 18mm;
5/16"-18x15mm, Suggest that the diameter of the hole is 12 +/- 0.2mm, the length is about 20mm;
3/8"-16x25mm, Suggest that the diameter of the hole is 14.3 +/- 0.2mm, the length is about 30mm;
2. Use the proper internal hex tool to screw in. Warm tips: You can use vise or clip to clamp the both sides while inserting the nuts to wooden board, which can effectively reduce cracking.