How much do the bolts weigh?

Bolts are the backbone of a solid construction. A wide range of sizes and a large selection - all this is the characteristic of bolts. One of the important parameters is weight. A large number of bolts are bought not in pieces, but in grams and kilograms, which is why it is important to know how much one item of a particular size weighs.

The range of fasteners includes a variety of bolts in different designs.

The accuracy class of such products is B, the thread is located along the entire rod. Depending on the thread, the weight and size of the fasteners change.

To find out theoretically how much one or a thousand hardware weighs, you need to know under which GOST number they are. These numbers can be found in special tables. They contain enough information about the weight of the bolts depending on the diameter, length and type of nut. And you can also find out how many pieces are in one kilogram, and what GOST standards by weight are observed for each type of bolts. The weight of the hardware is usually calculated together with the nut or washer.

A bolt with a hexagon head and a full screw thread (GOST 7798-70) is the most demanded fastener in the construction and machine-building industry, as well as when assembling furniture or repairing it. The bolt is produced in stainless steel and carbon steel, and also in brass. It has a foreign analogue according to DIN 933.

The weight of one bolt in grams depends on the size of the cap, its shape and the length of the bolt. The material also affects this indicator. The figures below show how diverse hardware there are, and what weight they may have in grams:

• M6 - 4.71, M6x14 - 5.52, M6x16 - 5.93, M6x20 - 6.74, M6x25 - 7.87, M6x30 - 8.98, M6x35 - 10.09, M6x40 - 11.2, M6x45 - 12.31, M6x50 - 13.42, M6x55 - 14.53, M6x60 - 15.64, M6x65 - 16.76, M6x70 - 17.87, M6x75 - 18.98, M6x80 - 20.09, M6x85 - 21, 2, M6x90 - 22.31;
• M8x10 - 9.624, M8x14 - 11.08, M8x16 - 11.8, M8x20 - 13.25, M8x25 - 15.07, M8x30 - 17.35, M8x35 - 19.32, M8x40 - 21.3, M8x45 - 23, 27, M8x50 - 25.25, M8x55 - 27.22, M8x60 - 29.2, M8x65 - 31.17, M8x70 - 33.14, M8x75 - 35.12, M8x80 - 37.09, M8x85 - 39.07, M8x90 - 41.04, M8x95 - 43.02, M8x100 - 44.99;
• M16 - 68, M16x30 - 83, M16x40 - 97, M16x50 - 113, M16x60 - 129, M16x70 - 145, M16x80 - 161, M16x90 - 176, M16x100 - 192.

A bolt with a reduced head in the form of a hexagon (GOST 7796-70) is used for fastening structures for which the value of the head height is important.

For manufacturing, steel 10, 20, 35, 35X, 40X, 30XR is used, accuracy class is B. Weight 1 pc. in grams:

• M10x10 - 13.57, M10x14 - 15.85, M10x16 - 16.99, M10x20 - 19.26, M10x25 - 22.11, M10x30 - 24.95, M10x40 - 31.25, M10x50 - 37.42, M10x60 - 43.59, M10x70 - 49.76, M10x80 - 55.93, M10x90 - 62.1, M10x100 - 68.27;
• M12 - 25.09, M12x16 - 26.73, M12x20 - 30.01, M12x30 - 38.21, M12x40 - 47.03, M12x50 - 55.92, M12x60 - 64.8, M12x70 - 73.69, M12x80 - 82.57, M12x90 - 91.46, M12x100 - 1003;
• M20x25 - 111, M20x30 - 123, M20x40 - 146, M20x50 - 169, M20x60 - 194, M20x70 - 218, M20x80 - 243, M20x90 - 268, M20x100 - 293

Eye bolts (GOST 4751-73) are used for lifting and rigging. The main feature of the hardware: instead of the head - a ring for attaching the cable. Steel for manufacturing - С15Е. It has a foreign analogue according to DIN 580. One eyebolt has a weight:

• M8 - 50 g;
• M10 - 120 g;
• М16х20 - 310 g;
• М20х24 - 500 g;
• М24х29 - 870

It is more convenient to bring the weight of larger hardware in kilograms:

• M30x37 - 1.58;
• М36х43 - 2.43;
• M42x50 - 3.72;
• M48x52 - 5.54;
• М56х60 - 8.09.

Butt bolts assembled (GOST 11530-93) - hardware with a round head and an oval headrest - are used for joining the rails of the railway track. One butt bolt weighs in grams:

• M22x135 - 448;
• М24х150 - 585;
• M27x130 - 696;
• М27х160 - 818.

Embedded bolt (GOST 16017-79) is designed to connect metal pads or install rails on a reinforced concrete base. Embedded bolts are manufactured in 2 standard sizes, their weight in grams:

• М22х175 - 635;
• М22х225 - 1350.

Anchor bolts (GOST 24379-80) are used to fasten any structure on a supporting base. Weight of one anchor:

• M12x300 - 350, M12x400 - 440 g;
• M16x300 - 660, M16x600 - 1130, M16x900 - 1600, M16x1000 - 1730 g;
• M20 x400 - 1.32, M20x500 - 1.57, M20x900 - 2.55, M20x1000 - 2.8 kg;
• M24 - 2.35, M24x1000 - 4.13, M24x1500 - 5.9, M25x1700 - 6.61 kg;
• M48x900 - 17.41, M48x1000 - 18.83, M48x1500 - 25.93, M48x2000 - 33.03 kg.

When buying 10-15 bolts, you do not need to know their weight, but if you need a large number, it will be easiest to place an order by weight: in kilograms or grams.

And you can also calculate the number of bolts available. To do this, you need to know how much one bolt weighs in theory, and have a balance available.

To convert the weight of the bolts from kg to pieces, you need to use the table of fasteners weights of different parameters. The calculation is based on the theoretical weight of one bolt based on the GOST standard. Divide the total weight by the weight of one bolt. Such calculations will be considered approximate, since the weight of the bolt is taken theoretically. When calculating, it is also worth considering that different grades of steel are used for the manufacture of hardware, respectively, and the strength class will also be different. To facilitate the counting process, there are special online calculators on the Internet that will help you convert pieces to kilograms and vice versa.