Product Name: Phillips Pan Head Machine Screws?

Size standard: All Screws meet Standard ASME B 18.6.3 (T18-I/T19-IA) -2013?

Pan Head The slotted pan head has a flat topsurface rounded into cylindrical sides and a flat bearingsurface, The recessed pan head has a rounded top sur-face blending into cylindrical sides and a flat bearingsurface， The disc head design provides a large contact area, making it easy to apply torque. The top of the head has a cross groove, which is compatible with a cross screwdriver, making it easy to install and remove. Compared to a single slot disc head screw, it can withstand greater torque. However, when the torque is too high, the cross groove may slip. The disc head has a moderate height and width profile, wider than a semi-circular head and narrower than a large flat head, making it suitable for situations where the first two cannot be used. The length measurement method for screws is the thread length below the disc head. If this type of screw is half threaded, the diameter of the unthreaded rod should not be less than the minimum pitch diameter of the 2A grade thread and not greater than the nominal (basic) thread diameter. Machine Screw Length of Thread 1：Sizes No.5 and smaller. Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 1-1/8 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall, unless otherwise specified,? have a minimum length of full-form thread of 1 in. 2： Sizes No.6 and smaller. Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 2 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall have a minimum length of full-form thread of 1.5 in. unless otherwise specified.?

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Stainless Steel Phillips Pan Head Screw is widely used in daily life due to the convenience of cross grooves and the oxidation and corrosion resistance of stainless steel, such as in the home appliance industry, food machinery industry, sports equipment, outdoor facilities, plastic products, thin sheet materials, shell cover plates, medical equipment industry and other internal structural parts that require stable connections.?

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ASTM F837 Standard Specification for Stainless Steel Internal Hexagonal Screws, Four property conditions are covered: austenitic Alloy Groups l and 2 in an annealed condition(AF)at 85 ksi maximum,in two cold worked conditions(CW)at 80 ksi minimum,( 68677473,CWl) at 102 ksi minimum, and martensitic Alloy Group S in a heat treated condition (HT) at l60 ksi minimum.The austenitic stainless steel socket head cap screw shallbe designated F837 Group 1 or 2 Condition AF, F837 Group 1or 2 Condition CW, or F837 Group 1 or 2 Condition CW1. The martensitic stainless steel socket head cap screwshall be designated F837 Group 5 Condition HT.?

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Stainless steel is usually polished, cleaned, and passivated, making it suitable for humid and outdoor environments. These screws will not rust, but they cannot achieve the chemical corrosion resistance that 316 stainless steel can withstand. 2. Black oxide 18-8 stainless steel is mainly required to meet the requirements of appearance parts. 3. The PTEF coating on 18-8 stainless steel mainly enhances the material's own shortcomings in terms of oxidation resistance and corrosion resistance. 4. The high corrosion resistance material 316 stainless steel has greater corrosion resistance and oxidation resistance than 18-8 stainless steel material. These types of screws are mostly used in harsh weather, seawater, and most chemical environments. Sometimes, in order to increase the relaxation effect of screws, relaxation glue such as nylon glue and water-based chemical glue are also applied to the screw threads.?

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The thread spacing that LeKou metal products can provide is UNC, and the thread diameter that can be provided is from 0 #, 1 #, 2 #, 3 #, 4 #, 5 #, 6 #, 8 #, 10 # -24 UNC、/12#-24UNC,1/4-20UNC、5/16-18UNC、3/8-16UNC、7/16-14UNC、1/2-13UNC、9/16-12UNC、5/8-11UNC、3/4-10UNC， The corresponding Socket No and Driver Size are: Socket No0, Socket No1, Socket No2, Socket No3, Socket No4, Socket No5. The length can reach 10 inches, and the thread is usually full thread or half thread, depending on the customer's choice.?

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