A325 Structural Bolts And Nuts

Length is measured from under the head.

A325 structural bolts and nuts.

A325s have a heavy hex head a full body diameter and are normally short in overall length since they are connecting steel to steel. A325 and a490 structural bolts are specialized heavy hex bolts designed to withstand the loads of steel to steel connections. The head of the heavy hex structural bolt is specified to be the same size as the heavy hex nut of the name nominal diameter allowing a single size wrench or socket to be used on the bolt head and nut. Nuts and washers used in a structural joint with heavy hex structural bolts must also meet appropriate standards.

A325 structural bolts astm a325 covers high strength structural bolts used in structural steel connections. Prior to its withdrawl in 2016 the astm a325 specification covered high strength heavy hex structural bolts from 1 2 diameter through 1 1 2 diameter. Falling under asme b18 2 6 dimensional standard there are two chemical and mechanical designations for structural nuts. Structural bolt weight chart structural bolt weight chart weight lbs per hundred astm f3125 grade a325 or a490 heavy hex structural bolts with a nut.

Hex head cap screws a325 structural bolts carriage bolts hex lag bolts heavy hex bolts hex flange bolts. Recommended nuts and washers. Dimensions meet asme b18 2. It defines mechanical properties for bolts that range from 1 2 to 1 1 2 inches 13 to 38 mm in diameter.

Material meets astm f3125 specifications for quality. Partially threaded screws come with precise threaded and unthreaded portions allowing you to place only the. Mechanical properties of astm f3125 f3125m grades a325 a490 structural bolts with nut compatibility grade a325 bolts are available in diameters from 1 2 to 1 1 2 inch for diameters greater than 1 1 2 astm a449 specifications should be considered with a minimum tensile strength of 120 000 psi. Astm a194 2h is also an acceptable substitute.

Astm a563 and a194 the chemical and mechanical designation for structural washers is astm f436. Astm a325 astm a325 is an astm international standard for heavy hex structural bolts titled standard specification for structural bolts steel heat treated 120 105 ksi minimum tensile strength. How to designate a heavy hex structural bolt. These astm grades are all high strength and go through a heat treating process required to develop their mechanical characteristics.