a490 bolts


Original video found at https://www.youtube.com/watch?v=OpKwdzGLbjc.a325 & a490 torque specifications a325 torque specifications bolt diameter ultimate tensile (lbs.) required min. bolt tension (lbs.) suggested tightening torque (ft.lbs.) 5/8" 27100 19000 200 3/4" 40100 28000 355 7/8" 55500 39000 570 1" 72800 51000 850 1 1/8" 80100 56000 1060 1 1/4" 101750 71000 1495 1 3/8" 121300 85000 1960ASTM A490 – Structrual Bolts, Alloy Steel, Heat Treated, 150-ksi Minimum Tensile Strength Nuts and washers used in a structural joint with heavy hex structural bolts must also meet appropriate standards.A490 Bolts Similar to the A325 ASTM standard, A490 bolts are used in steel to steel structural connections and applications and thus have shorter thread lengths than regular hex bolts. This keeps threads out of the joints in the connections.Load & Resistance Factor Design Specification for Structural Joints Using ASTM A325 or A490 Bolts: Approved by the Research Council on Structural Conn. Hardcover More Buying Choices $4.98 (2 used offers).ASTM A490 Scope – This specification covers quenched and tempered, alloy steel, heavy hex structural bolts from 1/2" to 1-1/2" diameter with a minimum 150 ksi tensile. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. ThisAuthor’s Note: In 2016, ASTM A325 and A490 were replaced by ASTM F3125. A325 and A490 are now grades under the F3125 specification. When reading this blog, please note that when we discuss "A325" and "A490" structural bolts, we are specifically discussing the grades of F3125 structural bolts.A325 and A490 heavy hex structural bolts are now grades under the new F3125 specification. Summaries of the now obsolete A325 and A490 specifications remain on our site for reference purposes only. This specification covers the chemical, physical and mechanical requirements for structural bolts manufactured from steel and alloy steel, in two strength grades, two styles and two types.An ASTM A325 bolt is roughly equivalent in strength to sae grade 5 and an A490 bolt is about equivalent in strength to SAE Grade 8. Herb Kirchhoff Herb Kirchhoff has more than three decades of hands-on experience as an avid garden hobbyist and home handyman.A490 bolts are similar in application and dimensions to A325 heavy hex structural bolts but are made from an alloy steel rather than a medium carbon steel, resulting in a higher strength fastener. The A490 specification is applicable to heavy hex structural bolts only.