DIYUK A2 Stainless Steel Allen Socket Cap Head Screws DIN 912 / ISO 4762, Metric Bolts M4 M5 M6 M8 M10 M12 M16, 6mm to 100mm Long, Packs of 1 or 10

DIYUK A2 stainless steel Allen socket cap head screws to DIN 912 / ISO 4762, in 47 sizes from M4 to M16 and from 6mm to 100mm long, each in packs of 1 or 10. The hex socket allows easy and precise installation for solid connections, and stainless steel gives corrosion resistance and an aesthetic look that matters in visible areas.

These A2 stainless steel Allen socket cap screws have a hexagon socket drive and a narrow head profile suited to tight or hard-to-reach fixing points. The socket (Allen) head sits neatly in a counterbore or recess rather than protruding like a standard hex bolt head, which is why socket cap screws are the usual choice wherever a flush or near-flush finish matters, or where a spanner can't get a clean swing at a protruding head. The hexagon socket also gives a positive, secure fit for the driving tool, which helps when a fixing needs to be driven or removed at higher torque without rounding off the head.

A2 stainless offers good general corrosion resistance and is cost-effective. Driving requires a correctly sized hex/Allen key matched to the screw diameter - most standard toolkits already cover the common sizes in this range. Several of the longer sizes are partially threaded rather than fully threaded, leaving a smooth shank section near the head for a cleaner bearing surface in clamped joints; M10×70mm is also available as a black steel screw.

Key Features

• A2 stainless steel construction for good general corrosion resistance at a cost-effective price
• Manufactured to DIN 912 / ISO 4762, so dimensions and thread engagement match other screws made to the same standard
• Hexagon socket (Allen key) drive, giving a strong, rounding-resistant fit for tools and secure driving even at higher torque
• Low-profile cap head designed to seat flush or near-flush in a counterbore, keeping the fixing out of the way where a raised bolt head can't be tolerated
• Full range from M4 up to M16, with multiple lengths per diameter spanning 6mm to 100mm
• Partial-thread option on several longer lengths, leaving a smooth unthreaded shank for a cleaner bearing surface when clamping material together
• A2 grade suits general workshop and outdoor use
• M10×70mm also available as a black steel screw
• Precise installation: the hex socket allows easy, precise fitting for solid, durable connections
• Aesthetic stainless steel finish, important in visible areas and projects where details matter
• Every size available in packs of 1 or 10

Specification

• Material: A2 stainless steel (M10×70mm black: steel) · Standards: DIN 912 / ISO 4762
• Head: Hexagon socket cap, Allen key drive
• Thread: Full or partial (marked per size), right-hand
• Pack sizes: 1 or 10 screws

The table below lists every diameter and the lengths currently available, so you can match the exact screw to your fixing:

Head and Socket Dimensions by Diameter

Head height (k) equals the thread diameter on every size. Thread length (b) applies to partially threaded sizes only.

Typical Applications

• Machinery and equipment assembly and repair - the flush-fitting Allen head suits access panels, guards and moving assemblies where a projecting hex bolt head could snag, foul moving parts, or simply get in the way.
• Automotive maintenance and modification - A2 stainless resists everyday road grime and moisture better than plain or zinc-plated steel, and the socket drive tolerates the higher torque often needed when working on vehicles.
• Outdoor structures - a cost-effective, corrosion-resistant fixing for exposed frames, fittings and outdoor furniture.
• Construction and structural steel connections - the wide diameter range (M4-M16) and long lengths up to 100mm cover everything from light fixtures to fastening structural elements in metal construction, including steel and aluminium components.
• Furniture assembly - the neat, recessed head keeps joints tidy on visible furniture components where a standard bolt head would look and feel out of place.
• Railings and terraces - durable connections for railings, terraces and general construction, where the look of the fixing matters.

Installation Guidance

• Use a correctly sized hex/Allen key matched to the screw diameter - most standard toolkits already cover the common sizes in this range.
• Where a flush finish is required, drill or machine a counterbore sized to the screw head diameter so the head sits at or below the surrounding surface.
• For the partially threaded lengths (M8×50mm, M10×50mm and M10×60mm), position the screw so the smooth, unthreaded shank spans the clamped material - this lets the shank bear the clamping load cleanly rather than the thread, giving a more consistent joint.

Common Questions

Which hex key do I need?
Match the key to the screw diameter: M4 takes a 3mm key, M5 4mm, M6 5mm, M8 6mm, M10 8mm, M12 10mm and M16 14mm. Every size is in the Head and Socket Dimensions table.

Will the head sit flush?
Yes, in a counterbore sized to the head diameter (D), for example 13mm for M8 and 16mm for M10, so the head sits at or below the surrounding surface.

Can I use them outdoors?
Yes. The stainless steel gives corrosion resistance, which makes these screws suitable for outdoor use.

What pack sizes are available?
Every size comes in packs of 1 or 10 screws.