GB, DIN, JIS, ANSI, BS, ISO, NFE and other custom-tailor parts. Material: Mild Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, Copper, Aluminum and other metals such as Stamping, Welding, Automotive Processing.

Screw in Grade 12.9, 10.9 and 8.8 & SS Screw DIN912/GB70 Hexagon socket head cap screws DIN931~933/GB5782~5783 Hexagon head screws DIN7991 Hexagon socket countersunk head screws ISO7380 Hexagon socket button head screws ISO7379 Hexagon socket head shoulder screws DIN916-45H Alloy Steel hex Socket Head Set Screw

It is a company specialized in production and sales of Carbon steel spheroidizing annealing wire, Alloy steel spheroidizing annealing wire, rivet wire, bright wire. The products are mainly applied in the down stream customers like the suppliers of precision electronic screw, building screws, auto-car fasteners, rivets, precision springs and various Precision Machinery Elements etc.

Bolts, nuts, machine screws, self-tapping screws, plain washers, spring washers, internal teeth washers, external teeth washers, blind rivets, expansion bolts, U-bolts, rivet nuts and spring straight pins of stainless steel 304, 304L, 316, 316L, 310S and other fasteners; High strength alloy steel products of grade 12.9: socket hex bolts, hex bolts, set screws and stopper bolts; Riveting products: self-clinching nuts, self-clinching studs, self-clinching screws, faceplate screw; Products to repair of the screw thread: wire thread inserts and installation tools; Special nylon mushroom head screws; Custom-made non-standard fasteners.

1. Nut category: DIN934、DIN985、GB923/DIN1587、DIN315、DIN6923、DIN928、DIN929 2. Tight set 3. U.S. and outside the hexagonal screws、machine screws 4. High strength stud、double-headed 5. Non-calibration done: strong technology、fast response、excellent price、prompt delivery.

General fasteners, import alloy steel fasteners, rivet fasteners, steel structure fasteners, plastic fasteners, stainless steel fasteners, Titanium alloy fasteners, copper fasteners, aluminum fasteners, chemical anchor bolts, embedding rubbers, coils, self-locking screws, mini precise electronic screws, products with a variety of designs and non-standard fasteners. Surface Treatment: White Zinc, Yellow Zinc and Dacromet, etc.

We strictly adhere to the standards of GB, ISO, DIN, BS, ANSI/ASME and JIS. Our products include stainless steel standard fasteners, copper standard fasteners, non-standard fasteners, automotive fasteners, small hardware and pipe fittings. We can process various non-standard fasteners according to your order. Product Line: electrical appliance screws, computer screws, toy screws, triangle screws, non-standard screws, cup head screws, nuts, plugboard screws, rivets, rivet bushings, cup nuts, combined screws (2) all kinds of pipe fittings; (3) Customize various fitting fasteners (connectors); (4) Make foreign connectors adapted to domestic requirement. (5) various standard bolts, nuts, screws, studs, rivets, washers, special fasteners, high strength fasteners, T-screws, locking nuts, slotted screws, nylon locking nuts, flange nuts, tapping screws; (6) apply imported excellent materials SUS304, SUS316 and SUS302HQ to produce various stainless steel standard fasteners, copper standard fasteners, copper washers, copper hollow rivets; (7) furniture screws: double head, hex head wood screws, countersunk tapping screws and various screws; (8) various wood machinery and paper machinery; (9) customize auto parts, punching parts, cold formed parts, casting parts, non-standard, hardware of various materials, such as iron, copper, aluminum, stainless steel, etc. Material for Machinery: Low-carbon steel, mid-carbon steel, high-carbon steel, alloy steel, stainless steel, nylon, PVC, copper, aluminum and aluminum alloy. Fastener Property Class: 4.8, 6.8, 8.8, 10.9, 12.9. Coating: Zinc-iron alloy, white zinc, five color, black coating, grey phosphate, black phosphate, yellow copper, black zinc, nickel plating, substitute chromium, electrophoresis (black), dacromet, hot-dip zinc plating, bluing and blackening.

The staple products for Dongrui are serial Multi-Station Cold Upsetting Formers, and the products are protected by many patents. Dongrui products are with complete range of specifications and stable quality which have been sold to everywhere in China and exported to America, Europe, the Middle East and South East Asia etc. in the world. Dongrui products are trusted by customers both at home and abroad. The company has passed through the certifications of ISO 9001:2008 quality management system and CE safety regulation, it has several sets of big size machine centers and a lot of advanced mechanized equipment made in China or imported from abroad, it also has a Technological Development Center at provincial level. The research and development ability and level of Dongrui company always plays a leading role at the fields of same trade in China, due to aiming at high standard and thanks to advanced inspection technique applied through whole production procedure, therefore the quality of Dongrui machines can be reliably guaranteed.

We provide high-quality fasteners according to the standards of DIN, ISO, ANSI/ASME, IFI, ASTM, BS, AS/NZS, JIS, KS as well as special fasteners at customers requirement. At present, our products include bolts, nuts, washers, and threaded rods covering 4 series and 30 categories. Materials involve carbon steel, alloy steel, stainless steel, etc. Under the collaboration of the staff and with years of experience in marketing, our products enjoy ready markets in United States, Europe, Australia, South-east Asia and other Pacific countries and regions and are well-appreciated by the customers. （DIN934DIN931DIN933）

There are five major series of our products: 1. High strength bolts with large hexagon head for steel structures (GB/T 1228-1231) 2. Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures (GB/T 3632-3633) 3. High strength bolts with hexagon head and flange torque type for steel structures (QBC 1011-1014) 4. Cheese head studs for arc stud welding (GB/T 10433) 5. Big specifications of wheel nuts, nuts with washer face and nuts sets The products carried out the standard like USA (ANSI/ASME ), Germany(DIN), Japan(JIS), Britain(BS), Australia(AS) and International Standard (ISO)etc, for example: 1. USA Standard high strength bolts with large hexagon head for steel structures (ASTM A325 A490 A325M A490M) 2. USA Standard Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures (ASTM E 1852) 3. Germany Standard high strength bolts for steel structures (DIN 6914-6916) 4. Japanese Industrial Standards high strength hexagon head bolts (JIS B 1186) 5. Japanese Industrial Standards high strength torque type bolts (JSS II-09) 6. British Standard high strength joints bolting (BS 4395) 7. Australia Standard high strength bolting (AS 1252) 8. USA Standard welding stud bolts (ANSI/AWSD 1.1) 9. USA Standard stainless steel welding stud bolts (ANSI/AWSD 1.6) 10. Japanese Industrial Standards Cheese head studs for arc stud welding (JISB 1198) In the same way, the company also produces according to customer's requirement like standard or special big diameter and big length high strength bolts, hexagon nuts, foundation bolts, double thread ends studs, thread rods, rail tie-in bolts and welding bolts, studs, pins, riveted fasteners which supply for vessels or boilers industry line. In addition, we can satisfy the requirement for the surface finish, for example: phosphated, hot dip galvanized, mechanical galvanized, sherardizing, dacromet and Teflon, etc. Among above-mentioned products, torshear high strength hexagon head with flange bolts, nuts and plain washers was our company’s patented products. They not only have the advantages of convenient handling, easy visual inspection, and high efficiency during construction but also convenient dismounting, and can use torque method to recheck if the bolts have been well fastened. These features have solved the problem of difficult fastening at the corner of the steel structure and prevented the potential risk of head broken caused by the indentation on the head shank of the washer.