Brass Countersunk Screws

Brass Hexagon Socket Countersunk Screws (DIN 7991)

These brass countersunk screws sit flush when installed, offering a decorative finish with strong corrosion resistance. Available in thread sizes M2 to M16 with lengths from 10mm to 90mm, with specials and imperial sizes available to order.

These brass hexagon socket countersunk head screws feature a hex socket drive that provides improved resistance to cam-out compared to common drives such as slotted or Phillips. Designed to be driven into a countersunk hole, they sit flush with the surface for a smooth, snag-free and visually clean finish.

These brass countersunk screws offer:

Good corrosion resistance and rust-proof performance
Anti-bacterial properties, making them suitable for environments requiring self-sterilising fasteners
A bright gold-like appearance, ideal for visible or vintage mechanical applications
Their flush-fit design also reduces snagging and the risk of injury in high-contact areas.

The hex socket drive allows high torque installation using a hex wrench or insert bit and is suitable for use with power drivers, helping reduce installation time.

Standard thread sizes range from M4 to M16, with lengths available from 10mm to 90mm, with other thread diameters and lengths available to order.

Optional thread locking patches can be added on request.

These brass screws can also be supplied in A2 stainless steel, A4 stainless steel, aluminium, and titanium. Non-standard sizes, finishes, and custom manufactured components are available to order. Minimum order quantities apply.

Technical Data & Available Sizes
Thread Diameter (d1)	M4	M5	M6	M8	M10	M12	M16
d2 max. (mm)	8	10	12	16	20	24	30
l2 (mm)	14	16	18	22	26	30	38
h max. (mm)	2.3	2.8	3.3	4.4	5.5	6.5	7.5
A/F nom. (mm)	2.5	3	4	5	6	8	10
Available Sizes (l1)	M4	M5	M6	M8	M10	M12	M16