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  1. 5/16"-18 Bolts | McMaster-Carr

    Choose from our selection of 5/16"-18 bolts, including hex head screws, socket head screws, and more. Same and Next Day Delivery.

  2. 5/8"-18 Bolts | McMaster-Carr

    Choose from our selection of 5/8"-18 bolts, including hex head screws, socket head screws, and more. Same and Next Day Delivery.

  3. Thread Mills | McMaster-Carr

    Choose from our selection of thread mills in a wide range of styles and sizes. Same and Next Day Delivery.

  4. 5/16"-18 Taps | McMaster-Carr

    Choose from our selection of 5/16"-18 taps, including general purpose taps, tap sets, and more. Same and Next Day Delivery.

  5. 5/16"-18 Inserts | McMaster-Carr

    Choose from our selection of 5/16"-18 inserts, including threaded inserts, nuts, and more. Same and Next Day Delivery.

  6. 9/16"-18 Adapters | McMaster-Carr

    Choose from our selection of 9/16"-18 adapters, including metal pipe and pipe fittings, tube fittings for metal tubing, and more. Same and Next Day Delivery.

  7. Thread Cutters | McMaster-Carr

    Choose from our selection of thread cutters, including external thread cutting, taps, and more. Same and Next Day Delivery.

  8. 5/16"-18 Screws | McMaster-Carr

    Choose from our selection of 5/16"-18 screws, including socket head screws, rounded head screws, and more. Same and Next Day Delivery.

  9. 5/8"-18 Dies | McMaster-Carr

    Choose from our selection of 5/8"-18 dies, including external thread cutting, external thread repairing, and more. Same and Next Day Delivery.

  10. 5/8"-18 Threaded Rods | McMaster-Carr

    Choose from our selection of 5/8"-18 threaded rods, including high-strength steel threaded rods, medium-strength steel threaded rods, and more. Same and Next Day Delivery.