Socket Head Cap Screws

Custom Screws Manufacturer


Socket Head cap Screws


Heatfastener is a professional engaged in the production of socket head cap screws and custom screws and 23 years of research and development of screw suppliers. The company has been working to solve the production of non-standard screw parts which are unable to be produced by others fastener manufacturers. We mainly produce high-precision screws, bolts, and other non-standard specific fasteners. In the traditional screw industry, we undertake high-strength, high-precision custom screws. We offer OEM and ODM service to meet clients’ special screw needs

With ISO9001:2008,iso14001:2004, and especially IAFT16949:2009 certification for the automotive industry. Heatfastener offers fully customized custom bolts and screws according to your needs. We can bring your fastener design to reality, and everything according to your requirements.

security screws

Socket Head Cap Screws Details

Socket cap screws, also known as socket head cap screws, socket screw, or Allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. Hex Cap Screws are fasteners featuring a hexagonal, six-sided, head with a washer face on the bearing surface and a chamfered point. Commonly used in construction and machine assemblies, hex cap screws are one of the most common fasteners used on the job site today.

We also manufacture our socket head cap screws with pin-in socket drives, spline drives, and 6 lobe drives. We can also supply them with a nylon patch or pellet. We can also manufacture these items in special materials and custom made as below listed:


  • Stainless steel – SS302, SS304, SS316, (good tenacity),Stainless steel A2 A4
  • Steel – C45(K1045), C46(K1046),C20
  • Brass – C36000 ( C26800), C37700 ( HPb59), C38500( HPb58),C27200CuZn37), C28000(CuZn40)
  • Bronze–C51000, C52100, C54400, etc
  • Aluminum – Al6061, Al6063 etc
  • Carbon steel – C1006,C1010,C1018,C1022,C1035K,C1045
  • Alloy steel – SCM435,C10B21,C10B339
  • Other material– Titanium, UNS C11000 Copper,silicon


  • Grade: Grade 4.8,Grade 6.8,Grade 8.8,Grade10.9,Grade12.9 etc
  • Standard:GB,DIN,ISO, ANSI/ASTM,BS,BSW,JIS, Metric, Inch
  • Finish:Plain, H.D.G, Black oxide, Chrome, Teflon,dacromet,Anodized,With nylok
  • Certificates: ISO9001:2015, ISO14001:2015,IATF16949, ROHS
  • Custom Made:OEM is available,according to customer requirments

Head type&Drive Type

  • Head Type:Flat, Oval, Binding, Pan, Round, Truss, Button, PF,Cheese,Fillister, Pan Washer, Cylinder,Hexagon, Indented Hexagon,Washer
  • Drive Type:Phillips, Slotted, Phiilips/Slotted, 6 Lobe, Pin 6 Lobe, Pozidrive, Square, Triangle,Y type. Tri-wing, S-type, H type, Hexagon, 5 Point,8 point, Spline, Spanner, Clutch, Hex pn,torx pin
  • Machine Screw, Tapping screws,threading cutting screw,threading forming screw


Socket head cap screws are a special type of fastener. Socket head cap screws are typically used in machine parts, die fixturing, and clamping. Socket head cap screws are ideal for applications in which there is not enough space to maneuver wrenches or sockets. they have a round cap with a hex head and are tightened with a socket wrench drive, choose the right cap head for your specific application.

Also, our custom fastener, bolts, and screws are widely used in the below industries

  • Electronics
  • Petrochemicals
  • Consumer products
  • Transportation
  • Agriculture
  • Heavy machinery
  • Construction
  • Automotive
  • Medical
  • Military
  • Aerospace
  • Oil and gas

Types of Socket Head cap Screws

  • Hexagon socket head cap screws
  • Low Profile Socket Head
  • Flat Head
  • Button Head
  • Socket captive screw
  • Socket set screws
  • Torx socket
  • Socket Shoulder screws

Benefits of Long Cap and Chrome cap screws

Chrome cap screws have a great appearance, those with a black oxide or armor coat finish resist corrosion

We supply all kinds of custom security screws from Micro M1 to Large long M40


Why Choose Socket Cup Screws?

It’s a cap screw with a cylindrical head and hexagonal drive hole. The screw head is clean and has no stamping or marking, which results in a smooth, finished look.

Button socket cap screws secure the mating parts or panels of an assembly or upper-level tool. Usually, an Allen wrench or hex key drives the screw into the components’ holes, and tightening occurs by applying torque to the screw head. 

Need Custom Screws for Your Industry?

As a 20-year industry experience manufacturer with a factory equipped with precision machines, we can provide, from consultation to production, a one-stop solution for you.

About Us

Shenzhen Heat Hardware Co., Ltd is a leading custom screw manufacturer in China founded in 2000 years. We are specializing in custom screws, security screws, Sems screws, Chicago Screws, Weld Screws, Long screws, Micro Screws, Thumb Screws, Set Screws, Custom bolts, carriage bolts, nuts, and other custom Fasteners. With more than 20years of industry experience. We have serviced over 20000customers including the aerospace industry, automotive industry, electronics, mechanical and electrical products, robots, the Medical industry, communications industry, Outdoor sports products, smart appliances, etc. we can provide one-stop fastener customized service for you no matter what kind of custom fastener you need.

Frequently Asked Questions

The primary advantage of Allen bolts over hex bolts is that the tool used to do them up can be smaller than the head itself. … Hex bolts can be used in small spaces if you have a socket driver with an extension rod. But you’ll still need more room around the hex head to accommodate the socket.

Socket head cap screws are typically used in machine parts, die fixturing, and clamping. Socket head cap screws are ideal for applications in which there is not enough space to maneuver wrenches or sockets.

The most basic difference between a cap screw and a bolt is the way in which these fasteners are installed. Technically, a bolt is installed by turning a nut to tighten the fastener, while a cap screw is installed by turning the head of the bolt to assemble and tighten

When you’re designing bolted joints, always use a washer under the head of the bolt to prevent galling between the bolt head and the material you’re bolting down. Get psyched: McMaster sells the washers you want as “Spring Steel Shims for Shortening Screw Shoulders.”

Use regularly for Grade 2 hex cap screws and high strength alloy steel for Grade 5 and 8 hex cap screws. Tooth lock washers—internal, external, internal-external, and countersunk external—create a ratchet action by biting into the nut or screw head and the surface it contacts

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads.

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