B5/16-24 x 4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR DPFD The head markings on the

The head markings on the washer indicate the grade of the steel and the size of the bolt or screw that it is designed to be used with

The unslotted hex head allows for easy installation with a hex key or wrench

The hex head allows for easy driving and removal using a standard wrench or socket

The screw has a full thread and an unthreaded portion under the head

B5/16-24 x 4 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR DPFD The head markings on theB5 16 24 x 4 MS90727 is an Alloy Steel B1821 Fine Cap Screw manufactured according to the specifications of ASTM A354BD. It has a diameter of 5 16 inches, a length of 4 inches, and a thread pitch of 24 threads per inch. The screw is coated with a zinc yellow finish and is compliant with the Defense Federal Acquisition Regulation Supplement (DFARS). It is commonly used in a variety of industrial and commercial applications, such as machinery,