Carbon Steel Custom Blue Zinc Plated Non Standard Pan Head Internal Hex Socket Machine Screw Custom Length/diameter Machine Screw

Material: Manufactured from high-quality carbon steel, ensuring excellent strength and durability to withstand significant loads and stresses.

Surface Treatment: Features a blue zinc plating process, which not only gives the screw an attractive blue-grey appearance but also enhances its corrosion resistance. The zinc coating forms a protective barrier against rust, extending the service life of the product.

Diameter range: M1.6 – M10 (or #0 – ⅜″)

Length range: 2 mm – 100 mm (or 1⁄8″ – 4″)

Head Ø ≈ 2 × shank Ø; head height ≈ 0.4 × head Ø

Drive: Hex socket (1.5 mm – 8 mm keys) or hexalobular (T6-T50)

Thread: Metric (6 g), UNC/UNF (2 A/3 A); fully threaded unless ordered otherwise

Standards: ISO 7380 / ISO 14583, DIN 7985H, JIS B 1174, ANSI/ASME B18.3BT

Strength class: A2-70, A4-70, 4.8, 8.8, 10.9, 12.9

Finish: Plain, black-oxide, zinc (Cr3/Cr6), Ni, Geomet, HDG, Dacromet

Carbon steel (1018, 35#, 45#, 40Cr, SCM435) for strength grades 8.8-12.9

Stainless steel A2-70/A4-70 (304/316) for corrosion-critical uses

Optional heat treatment (quench & temper, carburizing) for torque > 25 N·m

Salt-spray life: 48 h (Zn) – 1000 h (Geomet) depending on coating

Precision machinery, gear-box covers, bearing caps

Automotive interior, engine ECU, lamp clusters

Motor-bike bodywork, dashboard clusters

Electronic chassis, 19″ racks, control panels

Furniture hinges, aluminum profile assemblies

Food & medical equipment (A4-80 version)

Pan head gives large bearing surface—no countersink needed

Internal hex allows high tightening torque in low-clearance areas

Re-usable (machine thread) versus thread-forming screws

Clean aesthetic after installation; head sits slightly proud

Readily customized to non-standard lengths, diameters, or drives