Understanding the Grading and Strength Rating of Industrial Nuts and Bolts

Fasteners like nuts, bolts, screws, and nails are an essential part of almost all manufacturing and construction processes regardless of the scale and magnitude of the project. Made and supplied by the best nut bolt manufacturer company in India, the primary function of nuts and bolts is to hold two or more objects together firmly and lastingly.

Different objects in different projects can also be fixed by other means of fastening like welding, gluing, and cementing but all these solutions are permanent. Nuts and bolts on the other hand provide fixing at both permanent and impermanent levels as per the requirements.

Grading and strength rating of nuts and bolts

Nuts and bolts made and supplied by the top standard and self tapping screw manufacturers are graded with strength ratings that describe their property class. For instance, an ISO class 10 property nut can support the bolt load of 10.09 without stripping. In the same way, SAE class 5 nuts can handle the proof load of class 5 bolts. Nuts and bolts used across the industry verticals are mostly of hexagonal shapes and their proof load is what determines their class of property.

Some most common types of nuts and bolts include the following: 

  • Barrels and cap nuts

  • Cage and coupling bolts

  • Crushed and cross dowel

  • Inserts

  • Internal wrenching

  • Knurled nuts

  • Lugs and panels

  • Plates and flange

  • Hex and plate nuts

  • Split and weld nuts

  • Staked and swage nuts

  • Self-aligning nuts, and

  • Carriage Bolts. 


Nuts and bolts made and supplied by the best nut bolt manufacturer company in India are manufactured using low as well as medium carbon steel, with maximum tensile yield strength. They are made according to the nature of their applications. For example, nuts and bolts that find applications in the acidic environment are given special treatment so that they can combat the situation.

Concluding Remarks

Super Screws is the best nut bolt manufacturer company in India offering a wide range of industrial-grade self-tapping screws and other types of nuts and bolts. The company has always focused on innovation to come out with a product range that is not only cost-effective but also reliable and durable.

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