China Hex Socket Head Screws suppliers Product description: Torx-Plus drives have more contact points than hex drives, allowing you to reduce slippage or damage to the grooves when tightening these screws. With a tensile strength of 170,000 psi, these alloy steel screws are stronger than grade 8 steel screws. Their black oxide finish provides mild corrosion resistance in dry environments. They can be used with Torx-Plus and standard Torx tools (see Torx Bits and Torx Keys and Drivers). Screws meet ASTM A574 specification and material quality testing requirements. The length is measured from the head down. Coarse threads are the industry standard; choose these screws if you don't know the threads per inch. Fine threads are tightly packed to prevent loosening due to vibration. They are not compatible with coarse threads. Product Drawing: Hexalobular Socket Head Cap Screws GB/T 2671.2-2017 d(mm)P(mm)b(mm)dk(mm)ds(mm)k(mm)DriveB(mm)t(mm) minmaxminmaxminmaxminmax PlainKnurl M20.4163.623.83.981.8621.862T61.750.710.84 M2.50.45174.324.54.682.362.52.362.5T82.40.911.04 M30.5185.325.55.682.8632.863T102.81.011.27 M40.7206.7877.223.8243.824T203.951.421.8 M50.8228.288.58.724.8254.825T254.51.652.03 M61249.781010.225.8265.76T305.62.022.42 M81.252812.731313.277.7887.648T457.952.923.31 M101.53215.731616.279.78109.6410T508.953.624.02 M121.753617.731818.2711.731211.5712T5511.354.825.21 M1424020.672121.3313.731413.5714T6013.455.625.99 M1624423.672424.3315.731615.5716T7015.76.627.01 M1824826.672727.3317.731817.5718T8017.757.58 M202.55229.673030.3319.672019.4820T9020.28.699.2 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.China Hex Socket Head Screws suppliers website:http://www.xgf-hardwares.com/hex-socket-screw/