M4 X 20mm Socket Countersunk Screws (DIN 7991) - Zinc Plated High Tensile Steel (10.9) Description
The M4 X 20mm Socket Countersunk Screws (DIN 7991) - Zinc Plated High Tensile Steel (10.9) has the following features:
M4 (4mm) Thread Size (T)
2.5mm Hexagon A/F (A)
1.8mm Hexagon Depth (P)
DIN 7991 Manufacturing Standard
20mm Overall Length (L)
High Tensile Steel (10.9) Material
High Tensile Steel (10.9) Material Specification
0.7mm Screw Thread Pitch
Zinc Plated Finish
+/- 0.13mm General Tolerance
Metric Metric or Imperial?
8.96mm Head Diameter [max] (D)
2.48mm Countersunk Length (H)
90 degrees Countersunk Angle (CA)
Discover more about the Metric Socket Countersunk Screws range
Socket Countersunk Head Screws feature a countersunk head type, which allows them to sit flush with their target housing. Countersunk screws are designed to be used alongside pre-drilled countersunk recesses. The socket head of these components makes them ideal for use alongside Accu’s Hexagon Drive Bits or Allen Keys & Wrenches.
Metric Socket Countersunk Screw Kits
Accu ProKits, our high quality range of fastener kits, feature Socket Countersunk Screw Kits, available in A2 Stainless Steel and Marine Stainless Steel. With screw sizes M2, M2.5 & M3 (Micro) and M4, M5 & M6 (Small) as screw kit options, engineers and DIYers alike can be ready for their next project with our ultimate fastener kits.
Countersunk Captive Fasteners
Captive screw variants of Accu's Metric Countersunk Screws are available in A2 and A4 Stainless Steel, as well as thermoplastic PEEK materials. Our range of Socket Countersunk Captive Screws are designed to be used in conjunction with Captive Washers to prevent the screws from falling out of housing assemblies and conform to EU Safety regulations.
These fasteners can be manufactured from a range of materials, including A2, A4 and Bumax Stainless Steel, Titanium, Aluminium, 10.9 Hardened Steel and PEEK. Chemical Blackening is available on Stainless Steel screws, with Thread Locking Patches and various other finishes also available on request.
Security Screw Variant
For applications requiring a tamper-proof drive, this component is also available in a security variant, which can be found in Accu's Security Socket Countersunk Screws range. Vented socket countersunk screws are available through our custom manufacture service.
Accu’s Metric Socket Countersunk Screws are available in thread sizes ranging from M2 to M24, and lengths from 3.00mm up to 200.00mm.
Imperial Countersunk Socket Screws are available in diameters from #0 to 7/8 inch. Lengths are available from 1/8 inch up to 7/8 inch.
Minimum Thread Length
In accordance with DIN standard 7991, Accu's Socket Countersunk Head Screws are manufactured to a minimum specified thread length - please contact us before placing your order if this dimension is critical to your application.