Screw Body Size#8 (0.164")Threads Per Inch15 TPIBody Length Under Head1"Min. Thread LengthFULLY THREADEDMax. Thread LengthFully ThreadedHardness99 ROCKWELL BHead Height0.115"Drive Style#2 SQUARE DRIVE DRIVEMaterial18-8 STAINLESS STEELTensile Strength100,000 - 125,000 PSIYield55,000 - 75,000 PSIPackage Quantity25 Common Fastener Label Definitions"Stainless Steel" - With the addition of 12% chromium to iron, stainless steel is formed. The chromium protects the iron against most corrosion or red colored rust; thus the term "stainless steel". The ability of stainless to form a thin layer of protection on its outside surface, called a "passive film", is its most important characteristic in preventing corrosion."18-8" - 300 series stainless steel having approximately (not exactly) 18% chromium and 8% nickel. The term "18-8" is used interchangeably to characterize fasteners made of 302,302HQ,303,304,384, XM7, and other variables of these grades with close chemical compositions. There is little overall difference in corrosion resistance among the 18-8 types, but slight differences in chemical composition do make certain grades more resistant than others against particular chemicals or atmospheres.Austentic - Refers to 300 series stainless, the most popular of the stainless alloys accounting for 85%-90% of stainless fasteners soldNamed for sir Robert Williams Austen, an English metallurgist, austentic stainless is a crystal structure formed by heating steel, chromium, and nickel to a high temperature where it forms the characteristics of 300 series stainless steel.Tensile Strength - A common measure to compare the strength of a fastener. It is the load needed to pull the fastener apart.Yield - The resistance to a load pulling on the middle of a fastener until the fastener shows permanent deformation.
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