RAW MATERIAL: 1035 1045 40CR
FINISH: BLACK/ZP
STANDARD: DIN912
ASME B 18.3
SIZE: M5-M20
#10-1”
GRADE: IS0898-1(4.8/6.8/8.8/10.9)
SAE J429(GR.2/5)
Our Hex Socket Head Cap Screws are engineered for applications where high clamping performance, compact installation, and reliable mechanical strength are essential. Featuring a cylindrical head with a precision internal hex socket, these screws provide strong and direct tool engagement while requiring less installation space around the fastener than conventional hex head bolts. This compact configuration makes hex socket head cap screws particularly suitable for machinery, automation equipment, molds and dies, automotive components, precision equipment, industrial fixtures, and mechanical assemblies where space is limited but dependable fastening performance is required.
Our Hex Socket Head Cap Screws are manufactured from 1035 carbon steel, 1045 carbon steel, and 40Cr alloy steel, providing material choices for different mechanical and application requirements. 1035 steel offers a practical balance of strength, machinability, and cost efficiency for general-purpose applications, while 1045 steel provides a higher-strength carbon steel option for more demanding fastening requirements. For applications requiring enhanced mechanical performance, 40Cr alloy steel provides a suitable high-strength material option.
Metric property classes are available in 4.8, 6.8, 8.8, and 10.9 according to ISO 898-1, covering a broad range of fastening applications from general industrial assembly to high-strength mechanical connections. For inch-series requirements, SAE J429 Grade 2 and Grade 5 options are available, giving customers greater flexibility when sourcing fasteners for imperial-standard equipment and assemblies.
The primary advantage of a Hex Socket Head Cap Screw is its compact cylindrical head and recessed hexagonal socket. Unlike conventional hex head bolts that require clearance around the head for a wrench, socket head cap screws can be tightened directly from the top using an Allen key, hex bit, or compatible power tool.
This design is particularly valuable in confined spaces, recessed mounting locations, closely spaced components, and compact mechanical assemblies. The smaller external head profile allows engineers greater freedom in fastener placement while maintaining reliable clamping capability. The internal hex drive also provides positive tool engagement, supporting efficient installation and removal during both production assembly and equipment maintenance. For machinery manufacturers and precision equipment builders, this combination of compact geometry, accessible drive configuration, and high-strength fastening capability makes socket head cap screws an important component in modern mechanical design.
Our Hex Socket Head Cap Screws are manufactured according to internationally recognized standards, including DIN 912 and ASME B18.3, supporting both metric and inch-series applications. DIN 912 is widely recognized for metric hexagon socket head cap screws, while ASME B18.3 provides specifications for inch-series socket head cap screws.
DIN 912
ASME B18.3
Metric: M5–M20
Inch: ~#10–1"
We provide Black and Zinc-Plated (ZP) finishes to meet different application and environmental requirements. The availability of both finishes allows buyers to select the appropriate combination of surface protection, appearance, application environment, and cost efficiency.
A clean industrial appearance, widely used in machinery, tooling, fixtures, equipment, and general mechanical assemblies.
Additional surface protection, suitable for many general industrial applications requiring improved resistance to surface corrosion.
The compact design of Hex Socket Head Cap Screws makes them especially valuable in applications where conventional fasteners may interfere with surrounding components or require excessive installation clearance. They are widely applicable to machine frames, automation systems, tooling and molds, fixtures, brackets, mechanical components, automotive assemblies, industrial equipment, and precision machinery. For engineers, the recessed drive and compact head can provide greater flexibility when designing space-constrained assemblies. For manufacturers and maintenance teams, standardized dimensions and widely recognized DIN and ASME specifications make it easier to integrate compatible fasteners into existing production and service systems.
For OEM manufacturers, machinery companies, automotive suppliers, automation equipment builders, fastener distributors, importers, and wholesalers, our Hex Socket Head Cap Screws offer a broad and practical sourcing range. The combination of 1035, 1045, and 40Cr steel, ISO 898-1 grades 4.8/6.8/8.8/10.9, SAE J429 Grade 2/5, DIN 912 and ASME B18.3 standards, M5–M20 and #10–1" sizes, and Black or Zinc-Plated finishes provides flexibility for different industrial fastening requirements.
Whether you require standard socket head cap screws for machinery assembly, high-strength Grade 8.8 or 10.9 screws for demanding mechanical applications, or inch-series socket head cap screws for North American equipment, our product range provides a standardized and dependable fastening solution — engineered to deliver efficient installation and reliable clamping performance where conventional fasteners cannot provide the same combination of strength and space efficiency.
