Standard of external hexagon bolt:

  The standard of external hexagon bolt specifies that the thread specification is m3-m64. In the external hexagon bolt A and B, Grade A is used for bolts with d < = 24 and l < = 10d, or l < = 150 mm, while grade B is used for bolts with d > 24, or l > 10d or l > 150. The specification of the outer hexagon bolt is d = M12, the nominal length is L = 80mm, and the performance grade of the outer hexagon bolt is grade 8.8. The use of this type of bolt is the most frequent use of the hexagon bolt in the life of the bolt.

   

   

  Grade of external hexagon bolt:
  The grade of the external hexagon bolt is composed of two parts of numbers, which are respectively used to represent the nominal tensile strength and yield strength ratio of the external hexagon bolt.

  For example, the bolt of performance grade 4.6 means:
  a. The nominal tensile strength of bolt material is 400MPa;
  b. The yield strength ratio of bolt material is 0.6;
  c. The nominal yield strength of bolt material is 400 × 0.6 = 240mpa.

  After heat treatment, the material of high strength bolt with performance grade of 10.9 can reach the following requirements:
  a. The nominal tensile strength of bolt material reaches 1000MPa;
  b. The nominal yield strength of bolt material is 1000 × 0.9 = 900MPa.

  Qingdao Sured Trading Co., Ltd. is an industrial sales company for nearly ten years. The main fastener products are bumax hexagon bolt, outer hexagon bolt, FH lock nut, nord-lock lock lock washer, Schnorr spring washer, etc.

  Sured official website: www.sured.net

  Service telephone: 400-678-6377

  Email: service@sured.net