Countersunk Socket Head Cap Screw

Product Details

Countersunk Socket Head Cap Screw is used where a flush surface is required, such as machinery, molds, equipment panels and precision assemblies. The current supply reference is DIN 7991 / ISO 10642 / GB 70.3 / ANSI / ASME B18.3, with Alloy Steel / Stainless Steel, Black Oxide / Zinc Plated / Nickel Plated / Plain, and M4-M24/8.8-12.9.

Final dimensions, tolerances, grade or class, coating system, matched components, inspection documents and packing must be confirmed against the purchase order, approved drawing or project specification before production.

Selection & Use Steps

Confirm the base material, total fastening thickness and service environment.
Select the head, drive, thread, point or drilling capacity, washer and finish required by the application.
Verify tool, bit and installation direction; keep the screw perpendicular to the work surface.
Drive at a controlled speed and stop after the head or sealing washer is correctly seated.
Inspect seating, coating damage and joint condition; replace stripped or over-driven screws.

Technical Drawing

Confirm all dimensions against the approved drawing before production. Typical control points include overall length, diameter, thread series and tolerance, threaded length, end condition, head or point geometry where applicable, coating allowance and mating-part fit.

The technical drawing shown on this page, when available, is a selection reference and does not replace the buyer-approved manufacturing drawing.

Application Environment

Suitable application depends on the confirmed material, grade, finish and project design. Review exposure to moisture, chemicals, salt, temperature, vibration and dissimilar metals before selection.

For outdoor or corrosive service, confirm that the selected coating or stainless grade is compatible with the required service life and installation method.

Installation & Handling Precautions

Do not mix grades, heat numbers, thread series or nut classes during storage and installation.
Protect threads and coatings from impact, contamination and uncontrolled repair.
Confirm nut and washer compatibility, coating allowance and free thread engagement before assembly.
Do not apply a generic torque value; tightening depends on lubrication, coating, joint design and the approved engineering procedure.
Replace components with damaged threads, uncertain identification or unacceptable coating condition.

RFQ Checklist

Product name and governing standard: DIN 7991 / ISO 10642 / GB 70.3 / ANSI / ASME B18.3
Grade, class or material: Alloy Steel / Stainless Steel
Diameter, thread, length and relevant dimensions: M4-M24/8.8-12.9
Surface finish or coating: Black Oxide / Zinc Plated / Nickel Plated / Plain
Quantity, matched nuts or washers, and packaging requirement
Required MTC, heat traceability, inspection or third-party documentation
Application, destination and any approved drawing or project specification

Product reference gallery

Form and finish reference; final compliance follows order documents.

Ordering framework

Confirm the specification before quotation.

This product page identifies the available product family and basic supply range. Final compliance depends on the exact standard, grade, dimensions, finish, mating components, tests and documents stated on the purchase order or approved drawing.

01Standard and editionState the governing product standard, drawing or approved equivalent.

02Grade and classConfirm material grade, property class, condition and any supplementary requirement.

03Size and threadDiameter, pitch or TPI, thread series, fit or tolerance and handedness where applicable.

04Length and geometryOverall or effective length, head or end style, thread length and drawing dimensions.

05Finish and assemblyCoating standard, thickness or color, lubrication and mating-part compatibility.

06Quantity and evidenceLot quantity, packing, marking, MTC, inspection scope and destination requirements.

Request this product with a complete specification.

Product · standard · grade · dimensions · finish · quantity · documents · destination

Attach drawings or a size list in your email or WhatsApp conversation. State any required tests or documents for confirmation.

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