What is cap screw？
Cap screw is a screw with a head, that needs to be used in conjunction with a nut washer to be able to tightly connect two or more components together. Common head types are hex cap head and socket cap heads.
Of course, if you need screws with non-standard heads, you can also ask us to customize them.
Types of Hex cap screw
Hex head screws can be divided into stainless steel cap screws, carbon steel hex screws, brass hexagonal screws, copper outer hexagon screw， aluminum hex screws, titanium alloy cap screws, etc. according to the material. Different materials have their unique advantages. Choose the appropriate bolts according to your specific application scenarios.
You can choose hex cap screws made of 304 stainless steel or 316 stainless steel, which are corrosion-resistant and beautiful.
Standard：ANSI/ASME B18.2.1 DIN933 DIN931 DIN960 DIN961 DIN601 DIN6914
Metric dimensions: M3-M64
inch size：1/4”–3”
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: A2-70, A2-80,A4-70, A4-80
Length: 20mm–200mm
Medium strength hexagon screws, usually with color galvanized surface.
Standard：DIN933 DIN931 DIN601 DIN6914 ISO4014
Metric dimensions: M3-M64
inch size：1/4”–3”
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: Grade 2, Grade 5, Grade 8, Grade 9
Length: 20mm–200mm
High-strength screws, the surface can be hot-dip galvanized, Dacromet or black oxidation treatment.
Standard：ANSI/ASME B18.2.1 DIN933 DIN931 DIN6914
Metric dimensions: M5-M64
inch size：1/4”–3”
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: Grade 2, Grade 5, Grade 8, Grade 9
Length: 20mm–200mm
The strength of brass hexagonal screws is lower than that of carbon steel materials, but it has stronger anti-corrosion properties and is suitable for use in humid environments and scenarios prone to corrosion.
Standard：ANSI/ASME B18.2.1 DIN933 DIN931
Metric dimensions: M3-M64
inch size：1/4”–3”
Thread: UNC， UNF， Fine thread， Coarse thread
Length: 20mm–200mm
Types of socket cap screw
The socket head cap screw is also called allen cap bolt or internal hex cap screw , Different from the external hexagon bolt, the outer ring of the head is round, and there is a hexagon groove in the middle of the top, which needs to be installed with a special allen wrench.
The head of this type of screw is semicircular, also called pan head allen screw. This product can be searched according to different names.
Standard：ANSI/ASME B18.3BT, ISO7380, JISB1174
Metric dimensions: M2-M20
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80
Flat countersunk head socket cap screwThe hexagon socket screw of the flat head, after installation, is on a flat surface with the connector, and the non-protruding head looks very beautiful.
Standard：DIN7991 ISO10642
Metric dimensions: M2-M20
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80
Socket head shoulder cap screwHex socket screws with steps on the rod and shoulders can make the connector seal better.
Standard： ANSI/ASME B18.3SH ISO7379
Metric dimensions: M2-M20
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80
Cup head allen cap screwAlso called a cylindrical head hexagon socket cap screw, the head is thicker and the deep groove is less likely to be damaged.
Standard：DIN912,DIN251,DIN7984,DIN6912
Metric dimensions: M2-M20
Thread: UNC， UNF， Fine thread， Coarse thread
Grade: 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80
Our Company Advantage
T&Y Hardware offers a wide selection of Metric Hex cap bolts for export. Our Export quality Metric Hex Bolts are certified and guaranteed by many international inspection authorities. With fast, reliable, and efficient services T&Y Hardware has a reputation in Europe, South America, North America, and the Asian market. These metric hex bolts have hexagonal heads with a machine thread.
You can use this fastener to create a connection only with a nut or a tapped hole. We have a full range of Diameter and Thread count in stock. For you any requirement and quantity, T&Y Hardware is the best manufacturing power near your fingertip. Whether you need a cap screws, hex bolt, tap bolts, flange bolts, or structural bolts, we have all of them in full range.
International exhibitions over the years
The International Fastener Exp was held in October at the Mandalay Bay Convention Center in Las Vegas, USA. This is one of the largest and most important fastener exhibitions in North America, and we are honored to have participated. In the future, we will participate in more exhibitions to let more friends know us.
In May 2022, we participated in the Hanover Industrial Exhibition in Germany, which was quite successful. We also met old customers here and made many new friends.
In 2022, we participated in the Atlanta Machinery Show in the United States
Various parameters of our cap screw
- Socket head cap screw dimensions chart
- Hex head cap screw size chart
- Surface Treatment
- Material
Plain, Galvanized, HDG, Nickel Plated, Copper plating, black oxidation, passivation, polishing，power coated and so on
Carbon steel: Q235, A36, A572, C1006, C1008, C1010, C1018, C1018A, C1022, C1035K, C1045K, 12L14.etc
Stainless steel: 253MA、SS201、202、301、302、303、304、304L、309、310S、314、316、316L、316Ti、317L、321、347、410、416、420、430、435、904
Aluminium: AL6061, AL6063, 7075 etc.
Titanium or titanium alloy: TAD, TA1-TA8, TB2, TC1-TC10, etc.
Brass: C36000, C37700, C38500, C26800, C21000, C3602, C3604, H59, H62, H65, H68, H70, H90, etc.
Alloy steel: SCM435, 10B21, 40Cr, C10B33
Precipitation hardening steel: 17-7PH
Urea steel: 724L, 725LN
Superalloy: GH4169, GH4145, GH2132
Nickel Alloy： Nickel 200, Nickel 201
Non-metallic: Zirconia Ceramic, PFA, Polypropylene, PVDF, PPS, Polycarbonate, PEI, PTFE, PEEK, PVC, fiberglass, PA66 nylon, POM, Polyethylene.
Duplex Stainless Steel: S32750, S32760, S2205, S2507,F51, F53, F55, F60, F61, 2205
Steel: C15, C35, C45(K1045), S45C, C46(K1046), C20, etc
Iron: 12L13,12L14,12L15, etc.
Corrosion-resistant alloy: XM-19, C4, Alloy20, Alloy28, Alloy31, 904L, 318
Related Product
cap screw includes hex cap screws and socket cap screws, while bolt refers to all fasteners with heads and thread rods. Usually the most intuitive difference is that bolt is larger than cap screw.
Machine screws are all screws that need to be installed together with nuts, The threads of this type are called machine thread.
The cap screw is classified by the head. It is not limited to machine thread, but can also be made into self-tapping thread or wood thread.
Cap screw plays an important role in many fields such as machinery manufacturing, construction industry, furniture manufacturing, auto parts, medical devices, transportation industry and petrochemical industry.
We usually keep stock for standard items ,If not special items , No MOQ required
For the T&Y hardware industry, standard samples are free charge ,for new customers ,we required to pay for freight ,and charge will return after order confirm.
For Standard carbon steel hex cap screws or socket cap screw ,we will ship in one month ,For stainless steel cap screws ,we will ship in 7-10 days, Special items per required
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