M5-0.8 DIN 985 Metric Class 8 Nylon Insert Hex Locknut Black Oxide and Oil 2-56 NTM It has a square shape

It has a square shape with a 1/4-20 thread size

The 1/4-28 x 3 Hex Cap Screw Grade 9 DFAR EcoGuard USA is a high-quality fastener designed for use in a variety of applications

The #2 Medium Split Lock Washer is a high-quality washer designed to prevent nuts and bolts from loosening due to vibration or movement

Upgrade your projects with our durable 3/8-16 x 7 1/2 Carriage Bolt Grade 5 Fully Threaded Zinc

M5-0.8 DIN 985 Metric Class 8 Nylon Insert Hex Locknut Black Oxide and Oil 2-56 NTM It has a square shapeThe M5 0. 8 DIN 985 Metric Class 8 Nylon Insert Hex Locknut Black Oxide and Oil is a high quality, durable nut that is perfect for a variety of applications. It is made from steel and has a black oxide and oil finish for added durability. The nylon insert helps to prevent the nut from loosening, even under vibration. This nut is ideal for use in automotive, construction, and other industries.