M20X2.5 Hex Bolt A4-80

M20X2.5 Hex Head Cap Screw - A4-80 Stainless DIN 931/933

Hexagonal head bolts are one of the most commonly used fasteners, available in full thread or partial thread configurations. 

Partially threaded hex bolts have an unthreaded length under the head that is stronger than the threaded portion of the bolt. The unthreaded / threaded length dimensions vary by specification. Fully threaded hex bolts are often referred to as tap bolts, the entire length of the bolt is meant to engage with a tapped hole.

Hex bolts can be used with many different styles of locking and non-locking nuts to clamp tightly to whatever the bolt is being used to secure. A wrench is used to install and tighten hex bolts. To be used with locking or non-locking nuts or in a tapped hole.

Material: A4 / SAE Type 316 

A4 / 316 Stainless Steel fasteners are "marine grade" corrosion resistant; suitable for salt water applications. A4 fasteners also offer increased resistance to chemicals when compared with A2 stainless fasteners.

Per DIN EN ISO 3506: A4-80 austenitic stainless steel specifically refers to a tensile strength of at least 800 N/mm2.

Commonly used in wet environments. Popular across a wide range of industries: automotive, agriculture, photographic, medical / surgical,  food processing, clean energy, etc.

Also known as

Salt water corrosion resistant hexagonal head screw, six sided head screw with machine thread, appliance machine tap bolts.