1/4" 1/2" 3/4" 3/8" 5/8" 5/16" Metal Black Oxide Flat Washers M2 M2.5 M3 M3.5 M4 M5 DIN 9021

Description

Based on the concept of cooperation, innovation, and win-win, we create international leading Hex Washer Head Self Drilling Screw, Socket Head Bolt, Machine Screw, and strive to become the world's top brand. We have a complete production process, a strict quality assurance system, and our products have various specifications and are stable in quality. All employees of the company hope wholeheartedly and honestly to cooperate with all spheres of life at home and abroad in the pursuit of mutual development. We guarantee to provide customers with high quality products and timely and satisfactory service.

Allen set screw

M4-0.7 Hex socket tip point set screw is a type of screw generally used to secure an object within or against another object, normally not using a nut. The most common examples are securing a pulley or gear to a shaft. Set screws are usually headless (also called blind), meaning that the screw is fully threaded and has no head projecting past the major diameter of the screw thread. If a set screw has a head, the thread will extend all the way to the head (whereas a bolt might have an unthreaded shank between the head and thread). A blind set screw (known in the UK as a grub screw, quite possibly from its figurative resemblance to a soil-dwelling grub) is almost always driven with an internal-wrenching drive, such as a hex socket (Allen), star (Torx), square socket (Robertson), or slot. The set screw passes through a threaded hole in the outer object and is tightened against the inner object to prevent it from moving relative to the outer object. It exerts compressional or clamping force through the bottom tip that projects through the hole. Ever Hardware provides custom made fasteners and customizable packaging.

45H equals Grade 12.9, 12.9-grade M4-0.7 hex socket tip point set screw has 12X100 N/mm^2 tensile strength and 9 is a multiplier means 90% of 1200 = 1080 N/mm^2 is the yield strength of the grade.
Similarly, we also have grade 8.8, 10.9, 6.8 also. This is an imperial method implied by engineers to differentiate between different sets of steel grades. Mainly used to differentiate the bolts and nuts. like Grade 12.9 Hexagonal Bolt.
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper-based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance and to minimize light reflection. To achieve maximum corrosion resistance the black oxide must be impregnated with oil or wax. One of its advantages over other coatings is its minimal buildup.
The five basic steps for the black oxide conversion coating are clean; rinse; black oxide; rinse; supplementary coating (after-finish). If rust or scale is present on the part, additional steps such as acid pickling or alkaline de-scaling may have to be added before oxidizing. Neutralizing and/or further rinsing may be necessary on assemblies and parts with blind holes to eliminate “flowering” or bleed-out. Black oxide cannot be produced over plated parts (zinc, nickel, chromium, cadmium, phosphate). This plating must be stripped prior to the black oxide process.

Standard Size of the cone point grub screws

For the M3~M20 cone point grub screws, ,we have the following standard sizes in stock, generally can be shipped within 2 working days after payment, if customized, delivery time is generally 15-20 days. If there is an urgent need, please communicate with the seller in advance.

Typical size

914 din 2006
din 913 914
din 913 din 914
din 914 45h
din 914 a2
din 914 a4
din 914 and 916
din 914 iso 4027
din 914 m1 6
din 914 m10
din 914 m2
din 914 m2 5
din 914 m3
din 914 m4
din 914 m4x4
din 914 m5
din 914 m6
din 914 m6x8
din 914 m8

EUROTECH FASTENERS (WUXI) CO., LTD, has been focusing on the hardware fastener industry for many years, based in the Yangtze River Delta and radiating across the country. Engaged in the research and development, production, sales and service of fastener products. The company is committed to building a passionate and energetic young team to serve on the front line and provide customers with comprehensive solutions.

Founded on innovation, founded on integrity, and founded on quality. The factory has established complete experimental equipment and has passed ISO9001 quality management system certification. The products have passed third-party testing and certification and comply with EU environmental protection requirements. We are produced in strict accordance with national standards (GB), German standards (DIN), American standards (ANSI), international (ISO), Japanese standards (JIS), British standards (BS), etc., and at the same time, we develop and process non-standard products according to customer needs. Customized drawings and samples.

We win customers with high-end quality and fast service. Our products are widely used in solar energy, wind energy, environmental protection equipment and engineering, communication equipment and engineering, power equipment and engineering, curtain wall doors and windows, subway rail transit, ships, pump valves, petrochemical industry, food machinery , dyeing and finishing equipment, LED lighting, outdoor furniture, automobiles and mechanical equipment and other industries.