Good quality 100% ASTM A320 L7 Combination Studs Combo Studs for Bulgaria Factory
ASTM A320/A320M L7 Combination Studs Standard: According to drawing Inch Size: 1/4”-2.1/2” with various lengths Metric Size: M6-M64 with various lengths Other Available Grade: ASTM A193/A193M B7, B7M, B16 B8 Class 1 & 2, B8M Class 1 & 2, ASTM A320/A320M L7, L7M, L43, B8 Class 1 & 2, B8M Class 1 & 2, and so on. Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc. Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality and Strict Quality Control, Competitive Price,Timely Delivery; Technical Support, Supply Test Reports Please feel free to contact us for more details.
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    NOTE: The set screws mentioned in the video are incorrect. These are the actual set screws I used, verified in the shop, with a thread gage.

    Nonmarring Flat Point Set Screw, 18-8 Stainless Steel, M8 Size, 10mm Length, 1.25mm Pitch
    McMaster-Carr #92605A141

    https://www.mcmaster.com/mv1467920594/#catalog/92605A141

    Nonmarring Flat Point Socket Set Screw, Alloy Steel, M10 Size, 12mm Length, 1.5mm Pitch
    McMaster-Carr #93245A156

    https://www.mcmaster.com/mv1467920594/#catalog/93245A156

    4mm hex key (McMaster-Carr #71285A175):

    https://www.mcmaster.com/mv1467920594/#catalog/71285A175

    5mm hex key (McMaster-Carr #71285A177):

    https://www.mcmaster.com/mv1467920594/#catalog/71285A177

    6mm hex key (McMaster-Carr #7289A17):

    https://www.mcmaster.com/mv1467920594/#catalog/7289A17

    Suburban Tools video showing how to use a boring head: