A325 Structural Bolts And Nuts

Partially threaded screws come with precise threaded and unthreaded portions allowing you to place only the.

A325 structural bolts and nuts.

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. A325s have a heavy hex head a full body diameter and are normally short in overall length since they are connecting steel to steel. Recommended nuts and washers.

These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. A325 and a490 structural bolts are specialized heavy hex bolts designed to withstand the loads of steel to steel connections. The recommended grade of nut for an astm a325 structural bolt is astm a563 grade d dh or c. 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.

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. Astm a563 and a194 the chemical and mechanical designation for structural washers is astm f436. It defines mechanical properties for bolts that range from 1 2 to 1 1 2 inches 13 to 38 mm in diameter. These astm grades are all high strength and go through a heat treating process required to develop their mechanical characteristics.

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. 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. The most common heavy hex head screw these steel screws meet astm a325 regulations for structural joints such as mating i beams and scaffolding. How to designate a heavy hex structural bolt.

Length is measured from under the head. Astm a194 2h is also an acceptable substitute. Material meets astm f3125 specifications for quality. A325 structural bolts astm a325 covers high strength structural bolts used in structural steel connections.