General Hardware

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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.

External Spacer Product Description External Spacer or Centralizer is used in centralize the thread bar inside the middle of the drill hole. What is the Rebar Centralizer for? A device that incorporates a hinged ring and bow spring that keeps the casing or liner in the center of the wellbore to help ensure effective placement of a cement sheath around the casing string. Metal Centralizers Get in place quickly on your single rebar or threaded rod, whether hanging vertically or horizontally. Can be fixed in seconds. No more fumbling around with reeling or cutting every few minutes, saving valuable jobsite time and money! Made of carbon steel, these centralizers are durable and won't crack or break in extremely cold weather. If coating is specified, please call for price and production time. Custom sizes can be produced very quickly if required. ​​​ Specification: 1. External Spacer: The strap design makes the installation simply and easily, there are many pins inside the spacer, and the pins can lock the corrugated sheathing into the pitch makes the spacer immovable. 2. Strap Centralizer: The strap design makes the installation simply and easily, there are many pins inside the spacer, and the pins can lock the rebar into the pitch makes the centralizer immovable. 3. Olivary Centralizer: The olivary shape design makes the installation simply and easily ,there are six lockers on the centralizer, you can assemble the centralizer as buckle ,and there are many pins inside the wall, the pins can fasten the thread bar into the pitch, and this makes the centralizer immovable on the place of the rebar. 4. Lantern Centralizer: Lantern centralizer is used in centralizer the thread bar inside the middle of the drill hole.

Product Description Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 0 Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 1 Customised Approach 1 Tell us the product information you need. For example: material, standard number, strength grade, surface treatment, size, etc. 2 Tell us what you need your product to look like with a combination drawing. As well as other product requirements. 3 Tell us what you need your product to look like with a combination drawing. As well as other product requirements. Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 2 Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 3Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 4 Dimensional Deviation Our manufacturing process ensures precision in dimensions, minimizing any variations in diameter, length, or head shape that may deviate from specifications. Surface Imperfections Rigorous quality control addresses surface defects such as scratches, dents, or oxidation, preserving both appearance and surface quality. Thread Issues For rivets with threads, our quality assurance measures prevent difficulties during installation or potential thread damage during use by ensuring thread quality. Insufficient Strength We use materials with optimal strength, eliminating concerns about rivet breakage or deformation during use, ensuring reliable fastening. Head Shape Irregularities Precision design and manufacturing processes ensure that the rivet head conforms to specified shapes, ensuring secure installation and high-quality riveting. Material Deficiencies Our materials undergo thorough quality checks to address issues such as impurities or inclusions, maintaining overall performance and corrosion resistance. Coating Challenges If coated rivets are required, our advanced coating processes guarantee strong adhesion and uniformity, preventing corrosion and maintaining corrosion resistance. Installation Challenges We provide clear instructions for correct installation methods and tools, minimizing the risk of rivet damage or failure during use. Identification Challenges Each rivet is clearly marked with accurate information, preventing confusion and ensuring the correct use of rivets. Production Process Challenges Our stringent quality control measures address various aspects of the production process, preventing issues related to dimensions, materials, and surface treatment. Hollow Rivet Edge Issues Our quality assurance process for semi- hollow rivets ensures that riveting edges are free from cracks or uneven edges caused by quality issues." Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 5 Customized Solid Copper Hollow Rivets Hot / Cold Heading Crafts 6 Team With professional technical knowledge and over 20 years of customisation experience, the engineering team is able to quickly and accurately understand the specific needs of our customers and provide professional advice on rivet customisation. Pre-sales Services By communicating with our customers, we provide a comprehensive custom design service for rivets around size, shape, material and performance. Production The perfect production process and advanced production equipment ensure the high quality and precision of the products while meeting the demand of customers for different quantities of customised rivets. Quality Control Establish a perfect quality control system to ensure that the quality of custom rivets meets the standards and customer expectations through advanced testing methods, such as dimensional testing, material composition analysis, mechanical properties testing, etc. After-sales Service Provide comprehensive after-sales support services to solve problems that customers may encounter during use, ensuring customer satisfaction and the long-term performance of customised rivets.

Product Description 304 Stainless Steel Flat Head Screw C Large Flat Head Thin Head Flat Head Cross Head Screw M2M2.5M3M4 Strength class A2-70 Surface treatment Natural quality Abrasion resistance Head shape Pan head screw material Stainless steel A2-70 Standard GB819 M2 M2.5 M3 M4 Stainless Steel Screws Thin Head Cross Head Thin Flat Head Screws 0M2 M2.5 M3 M4 Stainless Steel Screws Thin Head Cross Head Thin Flat Head Screws 1 Feitai Precision is committed to high-quality, to revitalize the national screw business as its own responsibility, relying on a strict quality management system, relying on the company's many years of fastener support and service experience in the industrial field, in the industrial fastener professional technology has accumulated unique expertise, While meeting the smooth supply of conventional products and adapting to customers' special technical requirements and product needs, we provide you with professional fastening solutions to ensure the successful operation and sustainable operation of your project. Feitai Precision has a well-trained team, ready to assist you in product design, selection, and production, for further competitiveness at the same time segment the market and organize a special part to provide you with products that meet your requirements, and satisfactory service. M2 M2.5 M3 M4 Stainless Steel Screws Thin Head Cross Head Thin Flat Head Screws 2

Product Description A2 DIN7504 N Cross Recessed Phillips Pan Head Self Drilling Screws With Tapping Screw Thread Description Self-drilling screw DIN 7504N pan head and PH recess drills thickness plates depending on the screw diameter, from 2 mm (Ø3,5) up to 6 mm (Ø6,3). Materials in steel and stainless steel A2 and coating blue zinc plated, black zinc plated and white lacquered. DIN7504N Pan head Self Drilling Screw is also widely known as European standard DIN 7504N. The precise point cut is resulted to non-walking point that works for fast metal engagement. Pan head Self Drilling Screw is applied for fastening unsupported metal sheets. Landwide offers many surface finishings such as zinc plating, yellow zinc, black zinc, bronze, phosphated and ruspert coating, etc. Self dilling screw Pan head is one of the most commonly used screw. Landwide makes and supplies self drilling pan head screw range from #6 to 1/4" and length from 9.5mm to 150mm) in material carbon steel and stainless steel. Self Drilling screw Pan head works into both metal and wood. There is no need to pre-drill a hole, with the ability to connect components in one step, self-drilling screw pan head is very efficient in a variety of hard- substrate applications. The drilling capacity ranges from 1.5mm to 12.0mm. Landwide Screw DNA Standard screw DIN7504N with precisely point cut. Result to non-walking point which provides fast metal engagement. Available with white zinc, zinc, yellow zinc, mechanical zinc, Ruspert 500 / 1000 hours...etc. Application DIN7504N. For fastening unsupported metal sheets. Specifications #6, #7, #8, #10, #12, #14 (1/4"). Nominal Size M3.5, M3.9, M4.2, M4.8, M5.5, M6.3. Screw Length 9.5mm ~ 100mm Specification Item name Self-drilling tapping screws Cylindrical head DIN 7504 N - Diameter 4.2 x 19 mm Made of galvanised steel - with pH cross shape Size M2.9~M6.3 or Customized Material Stainless steel, Carbon steel,etc Head Tpye Flat head, Pan head, Wafer head, Button head, Cap head or Customized Drive Style Philips,Torx, hex, Cross, Slotted,etc. Hardness Rockwell B70;HV350~450°;HV400~550°;HV450~700°;8.8Grade HRC22~32°; 10.9 Grade HRC32~39 12.9Grade HRC39~44 Surface Finish Zinc Plated, Nickel Plated, Bronze, Copper,Phosphate, Oxidation black, Passivation, Tin, Dacromet, Gold, Chrome, Silver, Parkerising,Zinc-nickel alloy plated etc. Sample Available The sample is free of charge if we have the existing tooling, the freight charge will be on the buyer MOQ 10000pcs Sample time Samples time 3-5days, Lead time 10-15days Pricing Term EXW FOB, CIF Packing Bulk or Small boxes, pack in carton with pallet for big quantity Port Shanghai port Payment term TT (30% in advance as deposit, balance before delivery) bank transfer Service Customized size offered , OEM service Standard ISO,GB,DIN,ANSI d1 2.9 3.5 4.2 4.8 5.5 d2 max 5.6 6.9 8.2 9.5 10.8 k max 2.4 2.6 3.05 3.55 4 L1 4.5 5 7 8 10 Drill speed, rpm - - - - - Steel 1800-2500 1800-2500 1800-2500 1800-2500 1000-1800 Stainless steel 1000-1500 1000-1500 1000-1500 1000-1500 600-1000 Max. torque, Nm 1.5 2.8 4.7 6.9 10.4 Bit No. T10 T15/T10* T20 T25 T25 Our Product Catalogue Screw Self Drilling Screws Hex Self Tapping Screws Hexagon Socket Set Screws Hexagon Head Wood Screws Hex Socket Flat Countersunk Head Hexagon Socket Button Head Screw Cross Recessed Pan Head Self Tapping Screw Bolt Hexagon Head Bolt Lifting Eye Bolt Wing Bolt Carriage Bolt Swing Bolt Stud bolt T Shaped Bolt U Shaped Bolt Threaded Pipe Nipple Washer Flat Washer Spring Washer Lock Washer Tab Washer Retaining Washer Nut Hexagon Nuts Square Nut Eye Nut Wing Nut Lock Nut Self Clinching Nuts Anchors Hook Anchor Bolts Hammer Anchor Sleeve Anchor Expandable Bolt Anchor Rivet Nut Hex Rivet Nuts Csk Rivet Nut Blind Rivet Nut Flat Head Rivet Nut Slotted Rivet Nut Knurled Rivet Nut Floating Rivet Nut Self Clinching Standoff Rivet Blind Rivet Other Hardware Fasteners Adapter Sleeve Bushing ,Dowel Pin,Locating Pin,Steel Foot Cups etc. FAQ Q: What is your main products? A: Our main products are fasteners: bolts, screws, rods, nuts, washers, anchors and rivets.Meantime, our company also produces stamping parts and machined parts. Q: What is your manufacturing capacity? A: Our production capacity exceeds 3 million pieces per week. We currently have more than 50 production lines and we are constantly growing. Q: how can we guarantee quality? A: Always a pre-production sample before mass production; Always final Inspection before shipment; Q: How to ensure that every process's quality A: Every process will be checked by our quality inspection department which insures every product's quality. In the production of products, we will personally go to the factory to check the quality of products. Q: What is your payment method? A: 30% value of T/T in advance and other 70% balance on B/L copy. For small order less than1000USD, would suggest you pay 100% in advance to reduce the bank charges. Q: Can you provide a sample? A: Sure, Our sample is provided free of charge, but not including courier fees. Q: How long is your delivery time? A: We have large stock, 3 days for stock items,7-15days for production. Q: What's your price terms ? A: EXW/FOB/CIF/CFR/FCA/CPT/CIP/DAP/DDP Q: Wonder if you accept small orders? A: Do not worry. Please feel free to contact us, in order to give our clients more convenience ,we accept small order. Q: Can we print our own logo ? A: Yes, we can make it according to your request.

Volute springs, designed&manufactured according to JB/T11698-2013 standard (SHANGHAI HEGONG participated in drafting the standard). Its main features are small size and large load. HEGONG Volute springs is widely used in small spaces and large loads for vibration reduction. It has three structures as Equal helix angle, Equal pitch, and Equal stress.

U-shaped spring for elevator safety gear also be known as "U-shaped spring", "safety gear spring", "elevator safety gear leaf spring", mainly be used for progressive elevator safety gear. Safety gear is the most important safety component in an elevator, the safety of the elevator just can be guaranteed with safe and effective safety gear. And the HEGONG safety gear spring is the core component of safety gear, it is the last barrier of elevator safety. When the elevator falls out of control and exceeds the limited speed, the U-shaped spring CHINA starts to work, which stops the lift car in emergency and clamps it on the guide rail, ensure the safety of the elevator passengers. We have been working closely with a number of well-known elevator manufacturers, and developed U-spring for a number of progressive safety gears successfully. If you have any questions, please contact us (Tech@DiscSpringsMFG.com), our technical engineers will work closely with you to design, develop the proper spring according to your requirements.