A325 Structural Bolts And Nuts

A325 and a490 structural bolts are specialized heavy hex bolts designed to withstand the loads of steel to steel connections.

A325 structural bolts and nuts. A325 structural bolts astm a325 covers high strength structural bolts used in structural steel connections. Length is measured from under the head. A325s have a heavy hex head a full body diameter and are normally short in overall length since they are connecting steel to steel. Partially threaded screws come with precise threaded and unthreaded portions allowing you to place only the.

Hex head cap screws a325 structural bolts carriage bolts hex lag bolts heavy hex bolts hex flange bolts. Astm a194 2h is also an acceptable substitute. Dimensions meet asme b18 2. The recommended grade of nut for an astm a325 structural bolt is astm a563 grade d dh or c.

Material meets astm f3125 specifications for quality. The most common heavy hex head screw these steel screws meet astm a325 regulations for structural joints such as mating i beams and scaffolding. 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. 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 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. 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. Recommended nuts and washers. 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.

These astm grades are all high strength and go through a heat treating process required to develop their mechanical characteristics. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Astm a563 and a194 the chemical and mechanical designation for structural washers is astm f436. How to designate a heavy hex structural bolt.