Socket Low Head Cap Screw Full Thread M16x40 40Cr Alloy Steel

Socket Low Head Cap Screw Full Thread M16x40 40Cr Alloy Steel — stocked and shipped worldwide by SFX Fasteners. Available for single-piece retail orders — no minimum order — dispatched from our own warehouse within 24–48 hours.

Specifications

Ordering & shipping

Need a specific size, grade or standard? Send us a quote request — we quote to drawing and to DIN / ANSI / GB / JIS standards.

About this screw

This is a screw in 40Cr Alloy Steel, at strength class Grade 12.9, supplied black oxide (hardened), with an M16 thread and a 40 mm length. Every dimension is stated against the standard named above; where a tolerance class matters to your design, ask us and we will confirm it in writing before you order.

A screw threads directly into the parent material or into a nut, so the thread form, the point and the drive decide what it can be used for. Commonly used on machinery, tooling, appliances, electrical enclosures, furniture and automotive assemblies where the head has to sit low or be driven from one side only.

Black oxide on a hardened 10.9 / 12.9 part: stays within tight tolerances, adds mild corrosion resistance and avoids the hydrogen embrittlement that acid zinc plating can cause on high-strength steel.

M16 is a metric thread with an 16 mm nominal diameter and a coarse pitch of 2 mm (ISO 261). A standard hex head takes a 24 mm spanner across the flats.

Sold by the piece, so one is a valid order. Stock lines leave our warehouse within 24–48 hours of cleared payment, and freight is calculated at checkout from the packed weight and the destination.