Active Member
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[China]
Address: Rongda Industrial Park, Xinhua Road, Wangting Town, Suzhou City, China
Contact name:
Suzhou Crever Fastener Co., Ltd |
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Carbon Steel Black Oxide High Strength Hex Head Bolts Grade 10.9 12.9 Astm A490
1. Description:
The external hexagonal screw is a hexagonal screw, also known as a hexagonal screw. The Chinese standard for external hexagonal screws is based on Chinese standard parts. Abbreviated as the national standard. Then this external hexagonal screw standard refers to the external hexagonal screw national standard.
The outer hexagon bolt standard has one standard is the grade standard. Grade standard is divided into 4.8 grade and 8.8 grade. These two grades are used in particular on the market. Especially 4.8 grade external hexagonal bolt. Because it is much cheaper than 8.8 class outer hexagon bolt. Use more widely, of course. Some. But for high-demanding products. Because of the high requirements of hardness and other aspects. This requires the use of 8. 8 grade external hexagon bolt. 8.8 class external hexagon bolt from the hardness and torque of screws, etc. More secure in the use of products. More fastening. More stable.
Mechanical part, cylindrical threaded fastener with nuts. A type of fastener consisting of a head and a screw (a cylinder with external threads), which shall be matched with the nut. Used to fasten two parts with through holes. This form of connection is called bolt connection. If you unscrew the nut from the bolt, you can separate the two parts, so the bolt connection is detachable.
2. Specification Requirements:
| Product Name | M3-M64 DIN931 Carbon Steels and Stainless Steels full Threaded Hex Bolt |
| Process Method | cold forging & hot forging |
| Size | Diameter M5-M64 , length 40mm-500mm |
| Standard | DIN931/DIN933/930/961/960/6914 |
| Surface | Zinc, hot galvanize, black oxide |
| Grade | 4.8, 8.8S,10.9S,12.9S |
| Size Tolerance | +/- 2.5%~-2.5% |
| WT Tolerance | +/- 2.5%~2.5% |
| Tensile Strength | 830~1030 MPa/1040~1240 MPa |
3. Applications:
The most common hexagon bolt.Applicable to grade two, fifth grade, eighth grade and stainless steel.In most cases, it is threaded.Automotive, mechanical, electronic products, furniture products, music components, computers, power switches, small switches, hardware and plastic molds, sports equipment and so on.
Hexagon screws, standard parts and fasteners are widely used in all kinds of mechanical equipment, electronic products, communication equipment, furniture and equipment, construction and other production, installation and maintenance.Roads, Bridges, tunnels, urban rail transit system, high speed railway, sailors handicraft, thermal power, wind power, nuclear power, transmission and distribution, machinery, petrochemical, aviation, steel roof structure, etc.
4. Drawing Technical Data:
| Diameter (d) | Pitch | s | k | b | b (L >125mm) | b (L >200mm) |
|---|---|---|---|---|---|---|
| M5 | 0.80 | 8.00-7.78 | 3.65-3.35 | 16 | 22 | 35 |
| M6 | 1.00 | 10.00-9.78 | 4.15-3.85 | 18 | 24 | 37 |
| M8 | 1.25 | 13.00-12.73 | 5.45-5.15 | 22 | 28 | 41 |
| M10 | 1.50 | 17.00-16.73 | 6.58-6.22 | 26 | 32 | 45 |
| M12 | 1.75 | 19.00-18.67 | 7.88-7.32 | 30 | 36 | 49 |
| M14 | 2.00 | 22.00-21.67 | 8.98-8.62 | 34 | 40 | 53 |
| M16 | 2.00 | 24.00-23.16 | 10.29-9.71 | 38 | 44 | 57 |
| M18 | 2.50 | 27.00-26.16 | 11.85-11.15 | 42 | 48 | 61 |
| M20 | 2.50 | 30.00-29.16 | 12.85-12.15 | 46 | 52 | 65 |
| M22 | 2.50 | 32.00-31.00 | 14.35-13.65 | 50 | 56 | 69 |
| M24 | 3.00 | 36.00-35.00 | 15.35-14.65 | 54 | 60 | 73 |
| M27 | 3.00 | 41.00-40.00 | 17.35-16.65 | 60 | 66 | 79 |
| M30 | 3.50 | 46.00-45.00 | 19.12-18.28 | 66 | 72 | 85 |
| M33 | 3.50 | 50.00-49.00 | 21.42-20.58 | 72 | 78 | 91 |
| M36 | 4.00 | 55.00-53.80 | 22.92-22.08 | 78 | 84 | 97 |
| M39 | 4.00 | 60.00-58.80 | 25.42-24.58 | 84 | 90 | 103 |
| M42 | 4.50 | 65.00-63.10 | 26.42-25.58 | 90 | 96 | 109 |
| M45 | 4.50 | 70.00-68.10 | 28.42-27.58 | 96 | 102 | 115 |
| M48 | 5.00 | 75.00-73.10 | 30.42-29.58 | 102 | 108 | 121 |
| M52 | 5.00 | 80.00-78.10 | 33.50-32.50 | * | 116 | 129 |
5. More Pictures:
DIN931 HEX HEAD BOLT, HEX CAP SCREW, CARBON STEEL, BLACK OXIDE
