1/4-20 x 5/16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc MICPP They are made of black

They are made of black phosphate and have a sharp point for easy penetration

4-40 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Zinc And Bake are designed to provide a secure and reliable connection in a variety of applications

These 4-24 x 1 1/2 Phillips flat self-tapping screws are Type AB screws

The unthreaded portion of the screw features an indented hex washer head that provides a secure grip and prevents the screw from slipping during installation

The washer has a diameter of 3mm and a thickness of 14mm

1/4-20 x 5/16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc MICPP They are made of blackThe 1 4 20 x 5 16 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc is a versatile screw designed for a wide range of applications. Its 1 4 20 thread size provides a secure hold in various materials, while its 5 16 inch head diameter offers a stable base for tightening. The serrated hex flange washer provides additional gripping power, preventing the screw from loosening due to vibration or movement. The full thread design allows for