Overview
Socket Head Cap Screws (SHCS), also known as socket cap screws or Allen head cap screws, are high-strength fasteners designed for precision assembly and high-load applications. Featuring a cylindrical head with an internal hex drive, SHCS provide superior clamping force in confined or engineered spaces.
Offshore Milling & Sourcing supports bulk and factory-direct sourcing programs for Socket Head Cap Screws, serving OEM manufacturers, equipment producers, automation systems integrators, and industrial distributors requiring consistent strength performance and scalable supply.
We provide structured import programs aligned with recurring production schedules, container consolidation, and secondary supplier strategies.
Specifications
- Standard (Inch): ASME B18.3
- Standard (Metric): ISO 4762 / DIN 912
- Strength Class (Metric): 12.9 (most common)
- Inch Grade Equivalent: Comparable to Grade 8 strength
- Head Style: Cylindrical socket head
- Drive Type: Internal hex (Allen)
- Thread Type: UNC / UNF / Metric
- Diameter Range: #4 through 1-1/2″ (Metric M3 – M36 available)
- Length Range: Standard and extended lengths available
- Hardness: Heat-treated alloy steel
Materials
- Alloy Steel (Heat Treated)
- Stainless Steel 304
- Stainless Steel 316
- Alloy Steel Metric 12.9
- Special materials available upon request
Finish & Coating Options
- Black Oxide (most common)
- Zinc Plated
- Plain Finish
- Nickel Plated
- Mechanical Galvanized
- Custom corrosion-resistant coatings available
Finish selection is typically driven by environmental exposure and engineering specification.
Dimensional & Variation Capabilities
We support a wide range of SHCS configurations:
- Standard socket head cap screws
- Fine thread (UNF) options
- Metric class 12.9 programs
- Stainless corrosion-resistant options
- Custom lengths per print
- Reduced head height variations
- Private label packaging
- Mixed SKU container programs
Industries Served
- Machinery Manufacturing
- Automation & Robotics
- Automotive Production
- Equipment OEMs
- Aerospace Ground Equipment
- Industrial Fabrication
- Heavy Equipment Assembly
Applications
- Precision machinery
- Tooling assemblies
- Equipment mounting
- High-load fastening
- Mechanical assemblies requiring recessed drive
- Engine and drivetrain assemblies
Socket Head Cap Screws are commonly used where high tensile strength and space-saving head design are required.
Strategic Sourcing Capabilities
SHCS programs are often specification-driven and performance-sensitive.
Offshore Milling & Sourcing supports:
- Factory-direct import programs
- Metric and inch consolidation
- Secondary supplier support
- Volume-based pricing models
- Lead-time stabilization
- Custom engineering collaboration
We frequently assist OEMs seeking cost control, consistent heat treatment, and reliable dimensional performance.
Volume & Packaging Options
- Bulk cartons
- Palletized shipments
- Mixed SKU container programs
- Scheduled recurring imports
- Custom-labeled packaging
Request a Quote
To request Socket Head Cap Screw pricing, please provide:
- Diameter
- Thread type (UNC / UNF / Metric)
- Length
- Material
- Finish requirement
- Quantity
- Delivery timeline
Engineering drawings may be uploaded with your RFQ.
