The Fasteners

 .jpgThe fasteners are made from carbon and alloyed steel by the technical requirements for the bolts, screws, studs and nuts according to the GOST 1759-70.

The range of fasteners is the following:


Bolts

Types of bolts:

Average accuracy;

  • • GOST 7798-70 with hexagonal head;
  • • GOST 7796-70 with hexagonal downsized head.
  • • High accuracy:
  • • GOST 7805 – with hexagonal head;
  • • GOST 7808-70 with hexagonal downsized head.

Types of Average Accuracy:

Average accuracy screw types:
  • GOST 1491-80 with cylinder head;
  • GOST 17473-80 with semi-round head;
  • GOST 17475-80 – with countersunk head;

The Studs

The types of studs:
  • • With screw-in end, average and high accuracy: GOST 22032 , 34 , 36-76 ;
  • • Designed for details with flat holes GOST 22042-76 – average accuracy and GOST 22043-76 – high accuracy.

The Nuts

The types of nuts:
  • 1. GOST 5915 , 16 -70 – hex and low-hex corresponds to the average accuracy;
  • 2. GOST 5927 , 29 -70 – hex and low-hex corresponds to the high accuracy.

The Screw Nails

The types of the screw nails:
  • GOST 1144-80 – the screw nails with semi-round head;
  • GOST 1145-80 – the screw nails with countersunk head.
  • Is produced from carbon stee, grades 08kp, 10kp and other materials with mechanical properties not lower than materials mentioned above.

The Washers.

The types of washers:
  • 1. GOST 6958 -70 – the enlarged diameter washers;
  • 2. GOST 11371-70 – reduced diameter washers;
  • 3. GOST 6402-70 – the spring washers (the Grover’s washer);
  • are produced from the 65G steel, the thermally resistant spring washers are manufactured from steel 3013.

The Chains

The chains is a metal product used for the power transmission for different sorts of machinery:
GOST 13568-75. Driving roller chains and bush single and multiple strands chains, used for transmission of mechanical power on various sorts of machinery, except for the drilling rigs.
The examples of symbol notation:
• 2PV – 9.525-17.0;
• 2 – the number chain strands;
• PV – the transmission bush chains;
• 9.525 the chain pitch in mm;
• 17.0 – the fracture load, kN.
GOST 191-82. The loading plated chains used for chain transmission of reciprocating motion.

The examples of symbol notes:

• The chain G -160-1-50-GOST 191-82;
• G – loading plated;
• 160 – the fracture load, kN;
• 1 – type: with the beaded joint on the same end of the chain section;
• 50 – the chain pinch, in mm.
GOST 588-81. The towing plated bush and roller chains used in loading and towing transport and in the other types of machinery.
• The examples of symbol notes:
• M-112-100-1M;
• M – the towing plated chain;
• 1120 – the fracture load, kgc;
• 1-chain type;
• 100- the chain pinch of the specific links;
• 1 – the chain design.
• GOST 13552-81 the driving tooth chains with one-sided gearing of the plates.

• The examples of symbol notes:
• The chain P-1-19.05-74-45 GOST 13552-81, where:
• 1- the type;
• 19.05 – the chain pinch, mm;
• 74 – the fracture load 74 kN;
• 45 – working width, mm.
GOST 4267-78. The roller long link chains for the freight transport and elevators.

The examples of the symbol notes:
• TRD-38-3000-4-2-6-:
• TRD – the roller long link chain for the freight transport and elevators;
• 38—the chain pinch in mm;
• 3000 – the fracture load , kgc;
• 4 – the chain type;
• 2- the chain design;
• 6 – the holes diameter;
• T – The chain pinch of specific links.
U 26-02-1081-88. The oil rig chains designed for drilling rigs.
• The doping speed of the chain is 30m/c.
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