Socket Fastener Assortment Kits

Fastenal offers a variety of sizes for socket head fasteners.


Alloy Steel

This is the most general term for iron that has been combined with carbon, since all steel has some % of carbon, and at least one other element. Once the steel contains more than a specified threshold amount of a certain element it becomes an alloy. Each element has different threshold values and are used to improve some property of the steel. Common alloying elements are manganese, nickel, chromium, molybdenum, vanadium, and silicon.

System of Measurement

Imperial (Inch)

Also known as the Unified system, this measurement system is primarily used in the USA. It uses feet, inches and fractional inches as it basic measurements.

Also known as the SI system, this measurement system is used across the globe. It is based on multiples of ten and uses meters, centimeters, millimeters as its basic measurements.
(20 items in Socket Fastener Assortment Kits)