What's the difference between screws, bolts, and screws

Screw is an incorrect name, which is a general term for threaded parts by non-professionals, and there is no such term in the industry.
In the fastener industry, in fact, there is no strict distinction between screws and bolts. However, within the industry there are two ways to differentiate between screws and bolts:
1. According to the wrench structure. The so-called wrench structure refers to the place where the wrench is placed on the screw/bolt. That is to say, in some systems, the externally threaded rod-shaped parts of the external wrench structure are used. They are collectively called bolts, and conversely, those with internal wrenching structures are called screws. External wrench structure: hexagon head bolt; internal wrench structure: hexagon socket head bolt, etc. This is a more obvious example of fasteners in Chinese national standards, for example, GB5782, GB5783 (one half thread, one full thread) . Because they are all hexagonal structures, in the standard name, they are all called: bolts.
2. Distinguish according to whether the product has non-threaded rod features. This is also a widely used classification method, which is generally used to distinguish bolts and screws. That is: if all the stems of the product except the head are threaded, this part is called a screw. On the other hand, if, in addition to the thread, it also has the characteristics of a polished rod, it is called a bolt.

Recommended Products

  • Non-standard small square head bolts

    Size: M2.5 to M24 Length: Up to 300mm Standard: Non Standard, we can manufacture as customer's draw...
  • Flat head Hexagon Bolts Grade 4.8, Zinc Plated M5-M24

    Diameter range (mm):M5-M24,3/16-1’Length range (mm):10-600,1/2-16'
  • Zinc Plated,Roofing Bolt With Square Nut,Grade 8.8

    Diameter range (mm):M5-M20,3/16-1"Length range (mm):5-300,3/16-12"
  • Zinc Plated,INOX Slotted Round Head Machine medium,Screws,Grade 4.8

  • Zinc Plated,Longer Carbon Steel Full Thread Mushroom Head Carriage Bolt Grade 6.8 DIN603,M 10 /12 /16

    Diameter range (mm):M5-M24,3/16-1'Length range (mm):16-600,1''-2'
  • Yellow Zinc Plated,brass Slotted Round Head Machine Screws,Grade 4.8,

  • Cross groove Round Head Screw Zinc Plated Grade 4.8

  • High Strength Hexagon Bolts Grade 4.8

    Diameter range (mm):M5-M24,3/16-1’Length range (mm):10-600,1/2-16'
  • brass Cross Recessed Raised Truss Head Mini Machine Screws,Grade 4.8 6.8 8.8

    Diameter range (mm):M5-M20,3/16-1"Length range (mm):5-300,3/16-12"
  • Zinc Plated,Mini Philips Pan Head Security Machine Screws,Grade 4.8,Din7985 M10 M12

  • Din965 Cross Recessed Raised Flat Head Machine Screws ,Grade 4.8 ,Black Zinc Plated M2 M3 M4 M5 M6 M8 M10 M12

  • cup head square neck bolts with small head and Yellow neck