ID
1402102
$ 26.33
1-2 weeks delivery time
Diameter, mm:
- 3
- 4
- 5
- 6
- 8
- 10
Length, mm:
- 6
- 10
- 12
- 14
- 16
- 20
- 25
- 30
- 35
- 40
- 45
- 50
- 60
- 70
- 80
- 90
- 100
- 120
DIN 7991 hex socket countersunk head screws are manufactured from A2 stainless steel and designed for threaded fastening applications requiring a flush surface finish. Their flat countersunk heads fit into suitable recessed mounting holes, while the internal hexagonal sockets allow installation with a matching Allen key or hex driver. The corrosion-resistant A2 stainless steel construction is suitable for general mechanical, equipment and assembly applications. Available in 44 dimensional configurations across six nominal metric thread sizes — M3, M4, M5, M6, M8 and M10 — with lengths from 6 to 120 mm depending on the selected thread size. Each variant is identified by an individual FNI part number.
- Description
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DIN 7991 A2 Stainless Steel Hex Socket Countersunk Head Screws M3–M10, 6–120 mm
DIN 7991 hex socket countersunk head screws are manufactured from A2 stainless steel and designed for fastening applications where a flush surface finish is required. Each screw features a flat countersunk head with an internal hexagonal socket for installation using a compatible Allen key or hex driver.
The countersunk head is designed to sit flush with the surrounding surface when installed in a correctly prepared countersunk hole. Unlike self-tapping screws, these metric machine screws are intended for use with matching threaded holes or compatible nuts.
A2 stainless steel provides corrosion resistance for general mechanical, equipment and assembly applications, including indoor and outdoor installations where this material grade is suitable.
The range includes 44 dimensional configurations across six metric thread sizes: M3, M4, M5, M6, M8 and M10. Available lengths range from 6 to 120 mm depending on thread size. Each version has an individual FNI part number.
Technical Specifications
Product Type Hex Socket Countersunk Head Machine Screw Standard DIN 7991 Catalogue Designation TSPCE Material A2 Stainless Steel Head Type Flat Countersunk Head Drive Type Internal Hexagon Socket Thread Type Metric Machine Thread Available Thread Sizes M3, M4, M5, M6, M8, M10 Available Length Range 6–120 mm Number of Variants 44 Dimensions Format Nominal Thread Size × Length
Features and Applications
- Manufactured from corrosion-resistant A2 stainless steel.
- DIN 7991 flat countersunk head design.
- Internal hexagon socket for use with a matching Allen key or hex driver.
- Countersunk head allows flush installation in a suitable recess.
- Metric thread for fastening with compatible nuts or threaded holes.
- Suitable for mechanical equipment, fittings and general assembly applications.
- Available in six nominal thread sizes and 44 dimensional configurations.
Available Sizes and Part Numbers
Thread Size Length FNI Part No. M3 25 mm Y7991325 M3 6 mm Y799136 M4 12 mm Y7991412 M4 16 mm Y7991416 M4 20 mm Y7991420 M4 25 mm Y7991425 M4 30 mm Y7991430 M4 40 mm Y7991440 M5 12 mm Y7991512 M5 16 mm Y7991516 M5 25 mm Y7991525 M5 30 mm Y7991530 M5 35 mm Y7991535 M5 40 mm Y7991540 M5 50 mm Y7991550 M5 60 mm Y7991560 M5 70 mm Y7991570 M6 10 mm Y7991610 M6 100 mm Y79916100 M6 12 mm Y7991612 M6 16 mm Y7991616 M6 20 mm Y7991620 M6 25 mm Y7991625 M6 30 mm Y7991630 M6 50 mm Y7991650 M6 60 mm Y7991660 M6 70 mm Y7991670 M6 80 mm Y7991680 M6 90 mm Y7991690 M8 100 mm Y79918100 M8 120 mm Y79918120 M8 14 mm Y7991814 M8 20 mm Y7991820 M8 25 mm Y7991825 M8 30 mm Y7991830 M8 40 mm Y7991840 M8 60 mm Y7991860 M8 80 mm Y7991880 M10 20 mm Y79911020 M10 30 mm Y79911030 M10 40 mm Y79911040 M10 45 mm Y79911045 M10 60 mm Y79911060 M10 80 mm Y79911080
Size Selection
Select the required metric thread size and screw length for the intended fastening application. The screw thread must match the corresponding nut or threaded hole. Available lengths vary by thread size, so refer to the listed dimensional combinations and FNI part numbers.
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