Detailed Description

Packaging & Delivery

Selling Units:Piece/Pieces

Package Type:The product is packaged in cardboard boxes

Product Description

307A is the material standard for hexagonal bolts in the United States, which is a material standard rather than a manufacturing standard,Special Heavy Hexagonal Bolt,ASTM Heavy Hexagonal Bolt,ASTM A307 Hexagon Bolt

ASTMA307-2000 is the standard for carbon steel external thread standard fasteners. That is to say, three different strength grades using the same low-carbon steel material are represented by the letters A grade, B grade, and C grade. A-grade ordinary hexagonal bolts suitable for general commodity use; Class B is suitable for large (heavy) hexagonal bolts connecting pipes and flanges; Class C is applicable to anchor bolts and hook bolts with certain plasticity requirements, and is specified to use American standard A36 material. Grade A bolts require a minimum tensile strength of 412NN/elongation of no less than 18%, Grade B bolts require a minimum tensile strength of 412N/maximum tensile strength of 699NN/within the range of mm2, with an elongation of no less than 18%, Grade C bolts require a minimum tensile strength of 399N/maximum tensile strength of 551N/within the range of mm2, with an elongation of no less than 23%, equivalent to Grade 4.6 of GB, which requires high material requirements and is difficult to process. A-grade bolts are the lowest strength grade products in American standards. Therefore, in the early 1990s, the US FQA Fastener Quality Assurance Act specifically emphasized that all fastener products entering the US market, only A-grade bolts in the ASTMA307 standard, were not included in legal inspections, and all other standard fasteners must be inspected through recognized laboratory columns,ASTM A307 Special Heavy Hexagonal Bolt.

Q&A

Question：According to what criteria do we need to choose special Heavy Duty Hex Bolts?

Answer：When choosing a special heavy-duty hex bolt, it needs to be decided based on your engineering needs, the type of load that the bolt is subjected to (e.g., tensile force, shear force, torque, etc.), the required material strength grade, and the working environment (e.g., high temperature, corrosive environment, etc.). We recommend working with our technical team to ensure that the selected bolt meets your specific needs. We can provide heavy-duty hex bolts that meet international standards such as ASTM, DIN, etc., to ensure product quality and performance.