Various kinds of bolts, screws, hex nuts, flange nut, plain washers, spring washers, wood screws, thread rods and so on according to DIN, BS, ANSI/ ADSI, NFE, GB and ISO standards.
Materials: carbon steel, stainless steel and copper with brüniert zinc plated, galvanized and nikel plated in the surface.
Products: screws, bolts, nuts, washers, pins, rivets and so on.
Our products are widely used in the areas of energy, electron, wiring, mechanism, chemistry, metallurgy, mould, hydraulic pressure, cars and so on.
We can also manufacture non-standard fasteners according to guests’ inquiries.
Our products have passed the authentication of ISO9001, QS9000 and other international standards.
all kinds of hex socket head bolts, hex bolts, carriage bolts, double end studs, anchor bolts, U bolt, T bolt, track bolts, flange bolts, guardrail bolts, threaded steel bolts and a variety of high strength non-standard fasteners, various specifications of standard and non-standard nuts, washers and studs. Grade range: Grade 4.8 to Grade 12.9.Materials: steel and stainless steel. Surface treatment: zinc plated, black, hot dip galvanizing, plain and so on. DIN931 DIN933
Hex bolt stud rod
Bolts and Screws:
Hex Socket Head Cap Screw,
Hex Socket Head Set Screw,
Hex Socket Flat Head Screw,
Hex Socket Button Head Screw,
Hex Socket Head Shoulder Screw,
Hex Head Bolts
Wheel Hug Bolt
Drop in Anchor,
ISO, DIN, BS, ANSI, ASME, JIS, GB, other standard bolts, screws and standard parts & non-standard fasteners
production and sales of stainless steel self tapping screws,Mechanical screws,nuts, rivets,washers（plain washers and spring washers）,wedge anchor, stainless steel undercut anchor, aluminum extrusions, expansion screws and other standard or non-standard fasteners and curtain wall accessories.
Hex head bolts and screws, High strength bolts for Structural application, Full thread stud bolts, Double-end stud bolts , Socket head cap/set screws, Welded stud, Anchor bolts, U bolts sets, Clamp sets, Insulation clamp sets.
Hex nuts, Heavy hex nuts, High strength nuts
for Structural application, lock nuts
Plain washer, spring washer, square taper
API 20E BSL1、BSL2、BSL3 Bolts and Nuts
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.
Standard Fasteners: Nuts, Screws, Washers, Bolts, Screws, Threaded Rods, Drywall Screws, Rivets, Flange, Sleeves, etc., as well as a variety of Non-standard Fasteners, and we can also undertake external processing.
Our main products are Hex Bolts (Grade 4.8 and 8.8), Heavy Head High Strength Structural Bolts (Grade 10.9), High Strength Tension Control Bolts (Grade 10.9), U Bolts, Anchors (Sleeve anchors, Drop-in anchors, Wedge anchors, chemical stud bolts, nail-in anchors, etc.), All-Threaded Rods, Studs, Nuts, Washers, etc.. We are also capable of manufacturing non-standard fasteners according to samples or drawings.
hex head bolt,threaded rods, double end studs and other some non-standard fasteners under the different standards of GB, ANSI, DIN, BS, JIS, AS and ISO, grade of 6.8, 8.8, 10.9, 12.9, B7, B7M, L7, L7M. Our producing range: diameter: M12-M100; Length: 25-1200MM(Bolt) and
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.