DIN 7990 Hexagon Head Bolts With Hexagon Nut For Steel Structures DIN 7990 - 1989
| Product Name: | Hexagon Head Bolts With Hexagon Nut For Steel Structures DIN 7990 - 1989 | |
| Standard: | DIN 7990 - 1989 |  |
| Material: | Carbon steel and stainless steel | |
| Size: | Reference standards and according to customer requirements | |
| Finished: | Zinc Plated,Hot Dip Galvanized Steel,Dacromet,Nickel Plated,Black Oxide,Plain | |
| Delivery time: | Normally in 30-40 days. | |
| Thread Position | External | Thread Type: | Metric [M] |
| Internal Driving: | / | External Driving: | Hex |
| Locking Type: | / | Shank: | Normal Shank |
| Point: | Flat Point | Mark: | As required |
About Hex Head Screws and Bolts
Understanding Threading
Fully threaded screws engage with a tapped, threaded hole all the way to the head. Choose these when sideways force is not a concern.
Partially threaded screws have an unthreaded portion under the head for more holding power when force is applied from the side. The unthreaded portion is stronger than the threaded portion of the screw. Thread length may vary from the minimum thread length published to fully threaded.
Understanding Thread Size
Inch
Inch thread sizes are specified by diameter and threads per inch. Diameter is also known as screw size. For those with a diameter smaller than 1/4", screw size is indicated by a number (e.g., #10 or No. 10).
Metric
Metric thread sizes are specified by diameter and pitch, which is the space between threads. For the size M6 × 1 mm, the pitch is coarse; while the size M6 × 0.75 mm has a fine pitch. If you don't know the pitch, choose coarse threads; they're the industry standard.
Comparing Materials by Strength and Corrosion Resistance
Use this chart to compare the trade-offs between strength and corrosion resistance in different environments.
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Q1.
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Who are we?
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A1:
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We are based in Ningbo, China, starting in 2009, and sell to North America, Oceania, Domestic Market, Eastern Europe, Southeast
Asia, South America, Africa, and the Middle East. We have professional teams doing development, manufacturing, quality control and service management. |
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Q2.
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How can we guarantee quality?
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A2:
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Always take a pre-production sample before mass production. Always complete an inspection before shipment.
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Q3.
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What can you buy from us?
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A3:
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Fasteners: screws, bolts, nuts, washers, some CNC parts
Solar hardware: Solar Mounting Racks, Solar Mounting Accessories, Cable Clips, and ABS Solar Mounting Brackets. |
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Q4:
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Why should you buy from us, not from other suppliers?
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A4:
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Sokun is a professional manufacturer specializing in research, development, manufacture, and servicing of solar mounting systems.Since founding in 2009, we have professionally designed products to handle all systems as well as to ship goods in a timelymanner.
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Q5.
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What is your payment method?
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A5:
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30% value of T/T in advance and other 70% balance on B/L copy. For small order less than 1000USD, would suggest you pay 100% in advance to reduce the bank charges.
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