Overview
The OST 2S98-3-73 plug is a turnkey fastener with a hexagonal recess. The OST 2S98-3-73 plug is manufactured in two forms - with a tapered fine metric thread and a pipe inch thread. A plug of OST 2C98-3-73 standard is also sometimes called a threaded plug or a turnkey threaded plug with an internal hexagon. This fastener is used to temporarily or permanently close technical holes by screwing. In this case, the screwing can be done with a wrench or a special hexagonal wrench.
Fastening group OST 2C98-3-73
Depending on the material of manufacture, OST 2S98-3-73 plugs are divided into groups:
- Stainless fasteners
- Brass fasteners
Materials for the manufacture of OST 2С98-3-73 plugs
Plugs of OST 2С98-3-73 are made of the following materials:
- Steel, which can be additionally coated with zinc and zinc cloth.
- Brass. Brass nuts are used if the system is subjected to frequent dynamic, vibration and cyclic loads.
- Stainless steel grades A2 and A4. Allows the use of fasteners at significant temperature changes and in aggressive and humid environments.
Scope of application of OST 2C98-3-73 plugs
A plug is a fastener used to block technical holes to prevent leakage of oils or other liquids used in various types of internal combustion engines, gearboxes, transmissions, and so on.
OST 2C98-3-73 is used in air conditioning and heating systems, in oil lines, in engine crankcases, in hydraulic cylinder and gearbox housings.
