Shape AF/AFO standard shape of cap nut. AF is with center hole, AFO without center hole.
Shape AF/AFO standard shape of cap nut. AF is with center hole, AFO without center hole.
| D1 | B | D2 | D5 | E | K | L1 | S |
|---|---|---|---|---|---|---|---|
| M8 | WTE design | ||||||
| M10 | WTE design | ||||||
| M12 | 17.65 - 18.35 | 20.67 - 21.00 | 3.82 - 4.00 | min 18.90 | 6.82 - 7.18 | 32.38 - 33.00 | 16.73 - 17.00 |
| M16 | 20.08 - 20.92 | 25.67 - 26.00 | 5.82 - 6.00 | min 21.10 | 9.82 - 10.18 | 39.38 - 40.00 | 18.67 - 19.00 |
| M20 | 23.58 - 24.42 | 30.61 - 31.00 | 5.82 - 6.00 | min 26.75 | 12.785 - 13.215 | 48.38 - 49.00 | 23.67 - 24.00 |
| M24 | 27.08 - 27.92 | 34.61 - 35.00 | 9.78 - 10.00 | min 30.14 | 13.785 - 14.215 | 55.26 - 56.00 | 26.67 - 27.00 |
| M27 | 30.00 - 31.00 | 39.61 - 40.00 | 9.78 - 10.00 | min 35.72 | 15.785 - 16.215 | 61.26 - 62.00 | 31.48 - 32.00 |
| M30 | 34.50 - 35.50 | 44.61 - 45.00 | 9.78 - 10.00 | min 39.98 | 16.785 - 17.215 | 67.26 - 68.00 | 35.48 - 36.00 |
| M33 | 37.50 - 38.50 | 48.61 - 49.00 | 9.78 - 10.00 | min 45.63 | 21.74 - 22.26 | 76.26 - 77.00 | 40.48 - 41.00 |
| M36 | 40.00 - 41.00 | 53.04 - 53.50 | 9.78 - 10.00 | min 45.63 | 21.74 - 22.26 | 81.13 - 82.00 | 40.48 - 41.00 |
| M39 | 42.50 - 43.50 | 58.04 - 58.50 | 9.78 - 10.00 | min 51.28 | 22.74 - 23.26 | 85.13 - 86.00 | 45.48 - 46.00 |
| M42 | 45.50 - 46.50 | 63.04 - 63.50 | 9.78 - 10.00 | min 55.80 | 22.74 - 23.26 | 91.13 - 92.00 | 49.48 - 50.00 |
| M45 | 48.00 - 49.00 | 68.04 - 68.50 | 9.78 - 10.00 | min 55.80 | 25.74 - 26.26 | 97.13 - 98.00 | 49.48 - 50.00 |
| M48 | 52.90 - 54.10 | 73.04 - 73.50 | 9.78 - 10.00 | min 61.31 | 25.74 - 26.26 | 102.13 - 103.00 | 54.26 - 55.00 |
| M52 | 56.40 - 57.60 | 78.04 - 78.50 | 9.78 - 10.00 | min 66.96 | 26.74 - 27.26 | 108.13 - 109.00 | 59.26 - 60.00 |
| M56 | 59.90 - 61.10 | 82.96 - 83.50 | 9.78 - 10.00 | min 72.61 | 26.74 - 27.26 | 114.13 - 115.00 | 64.26 - 65.00 |
| M64 | 68.90 - 70.10 | 92.96 - 93.50 | M48x1.5 | min 83.91 | 31.69 - 32.31 | 129.00 - 130.00 | 74.26 - 75.00 |
| M72 | 76.40 - 77.60 | 104.46 - 105.00 | M48x1.5 | min 89.56 | 31.69 - 32.31 | 139.00 - 140.00 | 79.26 - 80.00 |
| M80 | 83.30 - 84.70 | 114.46 - 115.00 | M48x1.5 | min 100.72 | 35.69 - 36.31 | 151.00 - 152.00 | 89.13 - 90.00 |
| M90 | 92.30 - 93.70 | 129.37 - 130.00 | M48x1.5 | min 117.67 | 40.69 - 41.31 | 167.00 - 168.00 | 104.13 - 105.00 |
| M100 | 101.30 - 102.70 | 145.37 - 146.00 | M48x1.5 | min 134.62 | 44.69 - 45.31 | 181.85 - 183.00 | 119.13 - 120.00 |
✓ European Manufacturer
Looking for DIN 2510-AF/AFO cap nuts for pressure equipment, piping systems or demanding flange connections?
PowerBolt is a European manufacturer of DIN 2510-AF/AFO cap nuts manufactured in the Czech Republic according to DIN 2510 Part 7. We produce both standard and custom cap nuts from certified European materials for customers operating in the Oil & Gas, Petrochemical, Chemical Processing, Power Generation, Nuclear and Heavy Engineering industries.
DIN 2510-AF/AFO cap nuts are designed for use together with resilient sleeves (Dehnhülse) and reduced shank stud bolts in critical bolted flange connections. Two standard versions are available:
This design provides reliable guidance of the stud bolt, accurate positioning during assembly and improved preload distribution within demanding bolted joints.
Every cap nut is manufactured using modern CNC machining technology and controlled production processes to ensure excellent dimensional accuracy, complete material traceability and consistent product quality.
DIN 2510-AF/AFO cap nuts are designed for bolted flange connections operating under high mechanical loads, elevated temperatures and demanding service conditions.
When combined with resilient sleeves (Dehnhülse) and reduced shank stud bolts, they provide accurate positioning, reliable load distribution and long-term operational reliability. The availability of AF and AFO versions allows the assembly to be matched precisely to the application requirements.
PowerBolt supplies DIN 2510-AF/AFO cap nuts to customers operating in:
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DIN 2510-AF/AFO are heavy hex cap nuts manufactured according to DIN 2510 Part 7 for use with resilient sleeves (Dehnhülse) and reduced shank stud bolts in demanding bolted flange connections.
AF cap nuts are manufactured with a centre hole.
AFO cap nuts are manufactured without a centre hole. The letter “O” comes from the German word “ohne“, meaning “without”.
They provide secure fastening for reduced shank stud bolt assemblies and work together with resilient sleeves (Dehnhülse) to improve alignment and preload distribution.
Yes. We manufacture both standard DIN 2510-AF/AFO cap nuts and fully customised products according to customer drawings and project specifications.
PowerBolt manufactures DIN 2510-AF/AFO cap nuts from alloy steels, heat-resistant steels, stainless steels, ASTM A194 grades and nickel alloys.
Yes. Products can be supplied with EN 10204 3.1 or EN 10204 3.2 inspection certificates together with additional inspection documentation and third-party inspection upon request.
