Category 1 is the highest attainable anchor category for reliability

7/16-20 x 3 Grade 5 Hex Cap Screw Plain Domestic USA (50)

8 x 1 5/8 Star Flat Decking Screws w/ NIBS Yellow Zinc Plated T17 - Carton (5000)

5/8-11 x 1 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

7/8-9 x 2 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (65)

M27-3.0 DIN 985 Nylon Insert Locknuts Zinc Plated - Metric 5/8 Cotter Pins Plain Steel Category 1 is the highestOur M27 3. 0 DIN 985 locknuts are constructed from zinc plated steel and feature a nylon insert for secure fastening and increased resistance to vibration. Their metric size makes them compatible with a wide range of fasteners and components.