Washer Iran

Bolt with washer

Washer head screws are manufactured from low-carbon steel Grade 4.6 to alloy steel Grade 10.9. Standard thread diameters range from M4 to M24 with coarse pitch per ISO 4017. Their tensile strength varies between 400 and 1040 MPa. The integrated flat washer is typically made from hardened steel with a hardness of 300 to 400 Vickers. The washers outer diameter is designed to be 1.7 to 2.5 times the screws nominal diameter. Washer thickness is approximately 0.15 to 0.3 times the screw diameter. Common coatings include hot-dip galvanizing with a thickness of 45 to 80 microns. This coating provides corrosion resistance for up to 1000 hours in salt spray tests. The final tightening torque for Grade 8.8 ranges from 10 to 600 Newton-meters.

The screw structure consists of a hexagonal head, a fixed washer, and a threaded shank. The head height is typically 0.6 to 0.8 times its nominal diameter. The integrated washer reduces surface pressure by up to 40% by creating a larger contact area. This design prevents head sinking into soft materials. The standard operating temperature range is -50 to +150°C. Production tolerance for thread diameter follows accuracy grade 6g. The washer often features a diamond knurl texture with a depth of 0.05 mm to increase friction. These screws can withsta

Standard, Locking, and Washer-Integrated Nuts

Standard hex nuts are manufactured from Grade 5, 8, or 10 carbon steel per ISO 898-2. Their nominal height is 0.8 times the bolt diameter. Production tolerance class is typically Class B medium or Class C coarse per ISO 4759-1. Locking nuts incorporate vibration-damping mechanisms. The most common type is a nylon insert nut with a PA 6-6 capsule, heat-resistant to 120°C. Metallic types function via elastic deformation or a prevailing torque design e.g., distorted thread. These nuts must retain over 60% of initial clamping torque in standard vibration tests.

Washer-integrated nuts flange nuts feature a monolithic washer with an outer diameter approximately 1.7 times the nominal diameter. The integrated washer thickness typically ranges from 1 to 3 mm. This design improves pressure distribution by up to 40% and protects joint surfaces. For specific applications, slotted castle nuts for cotter pins and closed cap nuts are available. Common anti-corrosion coatings include hot-dip galvanizing, dacromet, and zinc flake. These coatings provide corrosion resistance for 480 to 1000 hours in salt spray testing. All nuts must meet the mechanical and dimensional requirements of ISO, DIN, or ANSI/ASME standards.

Komatsu excavator washer fluid reservoir

The Komatsu excavator washer fluid reservoir is designed with a capacity of 5 to 10 liters and pump operating pressure of 1.5 to 2 bar. The body is made of impact-resistant UV-stabilized polyethylene, with an operating temperature range from -20 to 80 degrees Celsius. Inlet and outlet connections have 8 mm diameter and are compatible with 6–10 mm standard hoses. The reservoir cap includes a silicone seal for leak prevention and mechanical strength up to 150 N/cm². Mounting brackets feature 120 mm bolt spacing, and total reservoir weight is 1.2 kg.

This reservoir can be connected to hydraulic or electric windshield washer systems in Komatsu excavators. Pump output ranges from 1 to 3 liters per minute, with a spray height of up to 1.2 meters. Vibration resistance up to 10g ensures durability. Internal pump and valve materials are chemical-resistant plastics and operate without oil lubrication. Quick installation with standard fittings and easy maintenance are provided. Pressure and durability tests comply with ISO 9001, and service life exceeds 5 years.

Carriage Bolt with Nut and Washer

Bolts and nuts are essential mechanical components used to secure parts in structures, machinery, and industrial equipment. They can be made from carbon steel, stainless steel, or high-strength alloys with surface hardness of 200–400 HB and tensile strength of 600–1100 MPa. Bolt diameters range from M3 to M36, with lengths from 10 to 300 mm. Threads are manufactured according to ISO, DIN, or ANSI standards, providing high tensile and torque load capacity. Galvanized, chrome, or epoxy coatings protect against corrosion and wear.

Nuts are used with flat, spring, or anti-slip washers to create uniform, strong, and secure connections. Suitable for light and heavy machinery, production lines, steel structures, and industrial projects. Precise mechanical design and manufacturing standards increase connection durability, reduce loosening, and extend service life. Quick installation and maintenance are ensured.

A4 split washer

Split washer spring washers are a type of washers that are widely used in the connection of hexagon and Allen screws. Spring washers are produced according to the DIN127 metric standard and are used in sizes from 3 to 36 mm. Spring washers are produced in iron, dry, steel and different grades of stainless steel, and its material depends on the material of the connecting bolt and nut. The use of spring washers in bolt and nut connections has been made in order to increase the tension of the connection and prevents the opening of the nut on the bolt in the connection of machines that face a high level of vibration.

M6 split washer

As the name suggests, the spring washer is compressed like a spring when the nut is attached to the screw. The galvanized iron spring washer is produced in sizes M3 to M24 and is placed in the bolt and nut connections between the flat washer and the work piece. Galvanized iron spring washer in size M6 micrometer is also used in the connection of hexagon screws, Allen screws, metric screws and sometimes even in the connection of machine screws. Spring washers are produced according to the DIN127 standard in a German standard machine with mm dimensions.

Galvanized carbon steel flat washer

Flat washers are used in bolted connections and behind nuts. The flat washer is used as a support to prevent nut damage in the connection on the work piece and as a seat to increase the connection tension. The dry flat washer, which is used in dry bolt and nut connections, has a tensile strength of 800 N/mm2 and has heat hardening treatment. Dry flat washers are manufactured according to DIN125 standard and have a moderate percentage of carbon in the alloy structure.

M10 carbon steel flat washer

Flat washer is actually made of high grades of steel. Dry steel flat washers are used to connect dry Allen screws, dry hex screws, and dry metric screws. Dry flat washers in M10 mm size are widely used in industries and are manufactured according to the DIN125 metric standard in the standard machine of Germany. Dry flat washers are produced in sizes M5 to M30 and are placed between the nut and the work piece.