General Hardware

Advantages: 1.Reasonable structural parameters, suitable for railway, road, bridge and other different prestressed structural parts; 2.Reasonable setting of heat treatment process specifications to achieve reliable technical performance; 3.The use of new material technology to obtain high and stable tensile strength; 4.Easy to use on site, fast installation, improve the user's production efficiency, reduce its production costs.

Minimum Order: 500

We can offer all steel and tungsten carbide self-drilling cross bit. The all steel self-drilling cross bits (EX) used for loose to medium dense ground formations. The tungsten carbide self-drilling cross bits (EXX) used for medium to strong fractured rock formations.

Minimum Order: 50

Coupler is mainly a cylindrical part, and there will be this type of part in many machinery, there are threads at both ends of the connector, and the threads at both ends also have a great role, and the thread is needed in the connection process. It will be used in buildings, when the steel bar connection in heavy buildings will need to this connector, its compression resistance is very good, and the connection performance is also very good, used in a variety of foundation pit anchoring, railways, municipal construction, Bridges, geotechnical, highway, slope anchoring and other fields.

Minimum Order: 500

Hexagonal self-drilling anchor nuts are designed to transfer the load from the plate into the self-drilling hollow bar. Self-drilling Anchor nut is used to lock the anchor system. It manufactured from high precision steel with chamfered edges on both ends from high precision steel, and tempered to meet the stringent demands on anchor specifications and the daily operations of underground work.

Minimum Order: 500

Materials used: ML08Al, ML10, swrch10a, SWRCH15A, swrch18a, SWRCH22A, 10B21, 10b33, swrch35k, swrch45k, ml20cr, ml40cr, SCM420, SCM435, scm440, ML20MnTiB, etc. Production standards: GB, Q, DIN, ASTM, JIS, BS, ISO and non-standard fasteners. Product grade: Grade 4, 6, 8, 10, 12. Surface treatment: trivalent blue white zinc, trivalent color zinc, trivalent black zinc, trivalent green zinc, trivalent golden yellow zinc, zinc nickel alloy (natural color, black, blue), military green, Dacromet, jumette, jumette, luchubao, mecali, nickel plating, brass plating, copper plating, chromium plating, tin plating, silver plating, lead tin alloy, mechanical zinc plating, hot-dip galvanizing, etc. Application: automobile, motorcycle, home appliance, robot, construction machinery, construction, mechanical equipment, iron tower industry, etc. Technological process: rough drawing, spheroidization, pickling and phosphating, fine drawing, cold heading, machining, tapping, heat treatment, electroplating, selection, packaging, warehousing and delivery.

Minimum Order: 1 bags

Materials used: ML08Al, ML10, swrch10a, SWRCH15A, swrch18a, SWRCH22A, 10B21, 10b33, swrch35k, swrch45k, ml20cr, ml40cr, SCM420, SCM435, scm440, ML20MnTiB, etc. Production standards: GB, Q, DIN, ASTM, JIS, BS, ISO and non-standard fasteners. Product grade: Grade 4, 6, 8, 10, 12. Surface treatment: trivalent blue white zinc, trivalent color zinc, trivalent black zinc, trivalent green zinc, trivalent golden yellow zinc, zinc nickel alloy (natural color, black, blue), military green, Dacromet, jumette, jumette, luchubao, mecali, nickel plating, brass plating, copper plating, chromium plating, tin plating, silver plating, lead tin alloy, mechanical zinc plating, hot-dip galvanizing, etc. Application: automobile, motorcycle, home appliance, robot, construction machinery, construction, mechanical equipment, iron tower industry, etc. Technological process: rough drawing, spheroidization, pickling and phosphating, fine drawing, cold heading, machining, tapping, heat treatment, electroplating, selection, packaging, warehousing and delivery.

Minimum Order: 1 bags

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Two-stroke piston ring Product Description A two-stroke piston ring is a crucial component in a two-stroke engine's operation. It sits in a groove around the piston and forms a seal against the cylinder wall, helping to contain the combustion gases within the combustion chamber. This seal is essential for maintaining compression and ensuring efficient engine performance. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 03261 32.00 1.50 1.50 03361 33.00 1.50 1.50 03463 34.00 1.20 1.20 03561 35.00 1.50 1.50 03661 36.00 1.50 1.50 03668 36.51 0.61 0.61 03760 37.00 1.20 1.20 04268 42.00 1.20 1.20 04366 43.50 1.00 1.00

Air compressor piston ring Product Description Dongya purchases a series of steel ring materials from well-known international companies, which can meet the design requirements of various structures and surface treatment piston ring. At the same time, in accordance with the ISO- 6621-3:2000 standard, according to customer needs and engine performance, we independently develop various cast iron ring materials. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 04181 41.00 3.00 3.00 3.00 04281 42.00 2.00 2.00 2.50 04681 46.00 2.50 2.50 4.00 04781 47.00 1.50 1.50 3.00 05081 50.00 2.00 2.00 3.00 05086 50.00 2.50 2.50 4.00 05087 50.80 2.40 2.40 4.76 05281 52.00 3.00 3.00 3.00 05581 55.00 2.00 2.00 3.00

Diesel engine piston ring Product Description DY piston ring surface treatment includes Chromium plating, Nitriding, PCr(CrN), DTC(ta-C), PVD(CrN), DLC(ta-C). With the rapid improvement of modern engine performance, in order to meet the development needs of high combustion pressure, high output power and maintenance-free, Dongya has successfully developed a DLC(Diamond Like Carbon) coating with low friction coefficient, high hardness, high wear resistance and significant tensile cylinder performance after years of professional research. It is currently the world's leading piston ring surface treatment technology, which is recommended that customers give priority to the choice of DLC coated ring group. NO. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 1 03504 35.00 0.80 0.80 2.00 2 03506 35.70 1.00 1.00 1.90 3 03508 35.80 1.00 1.00 2.00 4 03601 36.00 1.00 1.20 1.50 5 03704 37.00 0.80 0.80 1.50 6 03702 37.80 0.80 0.80 2.00 7 03703 37.80 0.80 0.80 1.50 8 03803 38.00 0.80 0.80 1.50 9 03801 38.40 0.80 0.80 1.50

Gasoline engine piston ring Product Description Piston rings are metallic split rings that are attached to the outer diameter of a piston in an internal combustion engine or steam engine. They form a seal between the piston and cylinder wall, which prevents pressurized combustion gases from entering the oil sump and regulate oil consumption by preventing excessive oil from entering the combustion chamber and burning.  NO. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 1 06241 62.00 1.50 1.50 2.80 2 06543 65.50 1.20 1.20 2.50 3 07143 71.00 1.00 1.00 1.50 4 07246 72.00 1.20 1.20 2.00 5 07448 74.80 1.50 1.50 3.00 6 08146 81.00 1.20 1.20 2.80 7 08341 83.50 1.20 1.50 2.50 8 08746 87.50 1.20 1.20 2.00 9 08842 88.00 1.20 1.50 2.50

DY Piston Ring Product Description The piston ring is a metal elastic ring with a large outward expansion deformation, which is assembled into the corresponding annular groove of the section. The reciprocating and rotating piston rings rely on the pressure difference of gas or liquid to form a seal between the outer circular surface of the ring, the cylinder, one side of the ring and the ring groove. Scope of Application DY Piston rings are widely used in various power machinery, such as gasoline engines, diesel engines, air compressors, hydraulic equipment, etc. Generally, the piston ring is installed in the ring groove of the piston, and it forms a chamber with the piston, cylinder liner, cylinder head and other components to do work. The function of piston rings includes sealing, regulating oil (oil control), heat conduction (heat transfer), guidance (support) four roles. Sealing: refers to sealing gas, do not let the combustion chamber gas leakage to the crankcase, the gas leakage is controlled at a minimum, improve thermal efficiency. Gas leakage will not only make the power of the engine drop, but also make the oil deteriorate, which is the main task of the gas ring; Regulating oil (oil control): Scrape off the excess lubricating oil on the cylinder wall, and at the same time make a thin oil film on the cylinder wall to ensure the normal lubrication of the cylinder, piston and ring.

Flat Hex Nut Product Description A flat hex nut is a type of nut with a hexagonal (six-sided) shape and a flat profile. Nuts are fasteners that are used in conjunction with bolts or screws to hold two or more parts together securely. The hexagonal shape of the flat hex nut allows for easy tightening and loosening using a wrench or a socket. Hex nut is an important part of thread bar accessory, it is used in all kinds of highway, railway, municipal construction, large Bridges, soil nailing, foundation pit anchoring, slope anchoring and other engineering construction. Hex Nuts are flat nuts and Spherical nuts, flat nut (upper nut), Spherical nut (lower nut). Commonly used specification is divided into 20 mm, 25 mm and 32 mm, 36 mm, 40 mm, commonly used materials are divided into 45 #, 40 cr material, hardness value is between 28 and 35.

M25 M32 Hex Nut for PT bar Product Description Hex nut is an important part of thread bar accessory, it is used in all kinds of highway, railway, municipal construction, large Bridges, soil nailing, foundation pit anchoring, slope anchoring and other engineering construction. Hex Nuts are flat nuts and Spherical nuts, flat nut (upper nut), Spherical nut (lower nut). Commonly used specification is divided into 20 mm, 25 mm and 32 mm, 36 mm, 40 mm, commonly used materials are divided into 45 #, 40 cr material, hardness value is between 28 and 35.   Normal there are full hex nut and spherical hex nut used in construction. There is also lock nut, which is shorter and thinner than normal hex nut in the tensioning end.