RapidBoltGet a Quote
    Back to Products

    Socket Head Cap Screws for Precision Engineering

    Socket head cap screws and socket set screws for precision assembly and high-strength applications requiring compact, reliable fastening solutions.

    High-strength socket screws for precision engineering applications
    Precision socket head cap screws with black oxide finish
    EN 10204 3.1 Certified
    ISO 9001 Quality

    Overview

    Socket head cap screws provide high clamping force in a compact head design, ideal for precision machinery, tooling, and applications where clearance is limited. Our socket screw range includes cap screws, set screws, shoulder bolts, and button head variants in high-strength alloy steel, stainless grades, and exotic alloys. All fasteners are manufactured to ASTM A574 or ISO 4762 specifications with full EN 10204 3.1 certification.

    EMG supplies socket head cap screws in materials ranging from ASTM A574 alloy steel to Inconel 718 and Titanium Grade 5, with full EN 10204 3.1 certification for safety-critical precision assemblies.

    Typical Applications

    • Precision machinery and equipment assembly
    • Tooling fixtures and die plates
    • Rotating equipment and gearbox covers
    • Aerospace component assemblies
    • Subsea equipment where compact fastening is required
    • High-vibration applications with locking features

    Fastener Types We Supply

    • Socket head cap screws (SHCS) - ASTM A574 / ISO 4762
    • Socket set screws (grub screws) - various point styles
    • Socket button head screws for low-profile applications
    • Socket countersunk screws for flush mounting
    • Shoulder bolts for precision pivot points

    Common Materials & Grades

    ASTM A574 Alloy Steel316 Stainless Steel304 Stainless SteelA286 SuperalloyInconel 718Titanium Grade 5MP35NHastelloy C-276

    Standards & Documentation

    • EN 10204 3.1 Mill Test Reports with full material certification
    • Heat number traceability from billet to finished fastener
    • Dimensional inspection to ASME B18.3 / ISO 4762
    • Hardness and tensile testing per specification requirements
    • ISO 9001:2015 quality management system

    NEED MACHINED COMPONENTS TOO?

    Spacers, blinds, special nuts, shafts and bushes — supplied to your drawing with the same traceability as your bolting. Precision Machined Components →

    RELATED RESOURCES

    Hex BoltsSpecial FastenersCoated FastenersASTM StandardsNORSOK M-650
    FREQUENTLY ASKED QUESTIONS

    Technical FAQs

    What is the tensile strength of ASTM A574 socket head cap screws?

    +
    ASTM A574 socket head cap screws have a minimum tensile strength of 180 ksi (1240 MPa) for sizes up to 1/2 inch, making them the highest strength standard fastener grade. This exceeds Grade 12.9 metric equivalents and is ideal for applications requiring maximum clamping force in a compact head profile.

    Can socket screws be used in corrosive environments?

    +
    Standard ASTM A574 alloy steel socket screws are not corrosion-resistant. For corrosive environments, we supply socket screws in 316 stainless steel, Inconel 718, Hastelloy C-276, or titanium. These maintain the compact head profile while providing the corrosion resistance needed for marine, chemical, or offshore service.

    What is the difference between socket head cap screws and socket set screws?

    +
    Socket head cap screws (SHCS) have a cylindrical head with an internal hex drive, used for clamping components together. Socket set screws (grub screws) are headless and are driven flush or below the surface, typically used to secure components against a shaft. Set screws are available with cup, cone, flat, oval, and dog point styles.
    GET IN TOUCH

    Need a Quote for Socket Screws?

    Send us the size, grade and quantity — or your drawings and bill of materials — and we'll return a technical quote for socket screws with lead times and certification included.

    Request a Socket Screws QuoteCall Now

    Emergency Support

    24/7 availability for critical projects