Review
GOST 7786-81 is a countersunk head bolt, also known as a plowman bolt. It is a reliable fastener that can withstand high loads. It consists of a rod with a metric thread and a countersunk head with a square header underneath, which prevents spontaneous unwinding, making the connection more reliable and durable.
Strength class GOST 7786-81
The strength class of a bolt according to GOST 7786-81 is the maximum applied force at which the bolt begins to fracture. Bolts of GOST 7786-81 are manufactured in strength classes from 8.8 to 10.9. From strength class 8.8, a bolt is considered high-strength.
High-strength GOST 7786-81 should be purchased only from trusted suppliers. It is made of alloy steel and such bolts are used for critical projects where, in addition to high loads and static loads, GOST 7786-81 bolts are subjected to constant vibration. Such bolts will be especially relevant in bridge construction, instrumentation, and in structures that are located near objects subject to vibration.
Fastening group of GOST 7786-81
Bolts of GOST 7786-81 are made of high-strength steel and belong to the high-strength fasteners group.
Materials for the manufacture of GOST 7786-81 bolts
GOST 7786-81 is made of steel, which can be additionally coated with zinc.
Areas of application of GOST 7786-81 bolts
Bolts of GOST 7786-81 are used to connect and fasten parts of furniture structures.
