Black Oxide Socket Head Screws
Description
Technical Parameters
Product Description:
These alloy steel screws boast an impressive tensile strength of 170,000 psi (1200Mpa), which makes them stronger than Grade 10.9 steel screws. When measuring the length, it's important to start from underneath the head.
If you're looking for socket head screws that can stand up to corrosion, there are a few options to consider. For dry environments, black oxide screws will provide some mild resistance. However, in wet environments, zinc-plated steel screws are a better choice, offering greater protection against corrosion. To make them easy to identify, some screws come with a blue-dyed finish.
If you need even greater protection against corrosion, consider zinc-flake-coated steel screws. They offer 20 times the corrosion resistance of zinc-plated screws and are comparable to Dacromet-coated screws. For even more protection, zinc-aluminum-coated steel screws are the way to go. They offer 40 times the corrosion resistance of zinc-plated screws, and are comparable to Magni-coated screws. In fact, they're capable of withstanding 1,000 hours of salt spray per ASTM B117. By choosing the right screws for your needs, you can ensure that they'll hold up even in harsh environments.
If you are unsure of the pitch or threads per inch, it is recommended to choose coarse threads as they are the industry standard. These screws are widely used and can be a reliable option. On the other hand, fine and extra-fine threads are specifically designed to prevent loosening caused by vibration. These threads are closely spaced and offer better resistance. However, it's important to note that they are not compatible with coarse threads. So, if you have the option to choose, consider the specific requirements of your project and select the appropriate thread type accordingly.
If you're looking for high-quality screws that meet industry standards, it's important to know which specifications and testing requirements to look for. For example, screws that comply with ASTM A574, ASTM A574M, and ISO 898-1 have been thoroughly tested for material quality. Meanwhile, screws that meet ASME B18.3, ASME B18.3M, ISO 21269, and ISO 4762 (formerly DIN 912) comply with strict dimensional standards. By carefully selecting screws that meet these requirements, you can ensure that your projects are built to last.
Product Features:
Drive Style | Hex socket |
Screw Features | Head Knurl |
System of Measurement | Metric |
Thread Direction | Right Hand |
Thread Fit | Class 6g |
Thread Spacing | Coarse |
Grade/Class | 12.9 |
Material | 35CrMo |
Standard | DIN912,ISO4762 |
Product Drawing:
Hexagon socket head cap screws | |||||||||
DIN 912-1983 | |||||||||
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d(mm) | P(mm) | b(mm) | dk(mm) | k(mm) | s(mm) | t(mm) | |||
min | max | min | max | min | max | min | |||
M1.4 | 0.3 | 14 | 2.46 | 2.74 | 1.26 | 1.4 | 1.32 | 1.36 | 0.6 |
M1.6 | 0.35 | 15 | 2.86 | 3.14 | 1.46 | 1.6 | 1.52 | 1.56 | 0.7 |
M2 | 0.4 | 16 | 3.62 | 3.98 | 1.86 | 2 | 1.52 | 1.56 | 1 |
M2.5 | 0.45 | 17 | 4.32 | 4.68 | 2.36 | 2.5 | 2.02 | 2.06 | 1.1 |
M3 | 0.5 | 18 | 5.32 | 5.68 | 2.86 | 3 | 2.52 | 2.58 | 1.3 |
M4 | 0.7 | 20 | 6.78 | 7.22 | 3.82 | 4 | 3.02 | 3.08 | 2 |
M5 | 0.8 | 22 | 8.28 | 8.72 | 4.82 | 5 | 4.02 | 4.095 | 2.5 |
M6 | 1 | 24 | 9.78 | 10.22 | 5.7 | 6 | 5.02 | 5.14 | 3 |
M8 | 1.25/1 | 28 | 12.73 | 13.27 | 7.64 | 8 | 6.02 | 6.14 | 4 |
M10 | 1.5/1.25/1 | 32 | 15.73 | 16.27 | 9.64 | 10 | 8.025 | 8.175 | 5 |
M12 | 1.75/1.5/1.25 | 36 | 17.73 | 18.27 | 11.57 | 12 | 10.025 | 10.18 | 6 |
M14 | 2/1.5 | 40 | 20.67 | 21.33 | 13.57 | 14 | 12.032 | 12.21 | 7 |
M16 | 2/1.5 | 44 | 23.67 | 24.33 | 15.57 | 16 | 14.032 | 14.21 | 8 |
M18 | 2.5/2/1.5 | 48 | 26.67 | 27.33 | 17.57 | 18 | 14.032 | 14.21 | 9 |
M20 | 2.5/2/1.5 | 52 | 29.67 | 30.33 | 19.48 | 20 | 17.05 | 17.23 | 10 |
M22 | 2.5/2/1.5 | 56 | 32.61 | 33.39 | 21.48 | 22 | 17.05 | 17.23 | 11 |
M24 | 3/2 | 60 | 35.61 | 36.39 | 23.48 | 24 | 19.065 | 19.28 | 12 |
M27 | 3/2 | 66 | 39.61 | 40.39 | 26.48 | 27 | 19.065 | 19.28 | 13.5 |
M30 | 3.5/2 | 72 | 44.61 | 45.39 | 29.48 | 30 | 22.065 | 22.28 | 15.5 |
M33 | 3.5/2 | 78 | 49.61 | 50.39 | 32.38 | 33 | 24.065 | 24.28 | 18 |
M36 | 4/3 | 84 | 53.54 | 54.46 | 35.38 | 36 | 27.065 | 27.28 | 19 |
M42 | 4.5/3 | 96 | 62.54 | 63.46 | 41.38 | 42 | 32.08 | 32.33 | 24 |
M48 | 5/3 | 108 | 71.54 | 72.46 | 47.38 | 48 | 36.08 | 36.33 | 28 |
M56 | 5.5/4 | 124 | 83.46 | 84.54 | 56.26 | 57 | 41.08 | 41.33 | 34 |
M64 | 6/4 | 140 | 95.46 | 96.54 | 63.26 | 64 | 46.08 | 46.33 | 38 |
M72*4 | 6/4 | 156 | 107.5 | 108.5 | 71.26 | 72 | 55.1 | 55.4 | 43 |
M80*4 | 6/4 | 172 | 119.5 | 120.5 | 79.26 | 80 | 65.1 | 65.4 | 48 |
M90*4 | 6/4 | 192 | 134.4 | 135.6 | 89.13 | 90 | 75.1 | 75.4 | 54 |
M100*4 | 6/4 | 212 | 149.4 | 150.6 | 99.13 | 100 | 85.12 | 85.47 | 60 |
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory and OEM are available.
Q: How long is your delivery time?
A: Generally it is 2-5 days if the goods are in stock,or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: 30% T/T in advance ,balance before shipment or L/C.
If you have another question, please feel free to contact us.
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