Package Quantity: 25pcs 5/16"-18x30mm Hex Socket Insert Nut
Internal Thread Size: 5/16"-18; Nut External Diameter: 13.8mm, Length: 1-1/5"(30mm)
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.
5/16"-18x10mm, Suggest that the diameter of the hole is 12.8 +/- 0.2mm, the length is about 13mm;
5/16"-18x15mm, Suggest that the diameter of the hole is 12.8 +/- 0.2mm, the length is about 18mm;
5/16"-18x20mm, Suggest that the diameter of the hole is 12.8 +/- 0.2mm, the length is about 23mm;
5/16"-18x25mm, Suggest that the diameter of the hole is 12.8 +/- 0.2mm, the length is about 28mm;
5/16"-18x30mm, Suggest that the diameter of the hole is 12.8 +/- 0.2mm, the length is about 33mm;
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.