DIN 561 Reduced Head Bolt with Spigot
DIN 561 bolt with reduced head, spigot and full thread M6-M56, length 12-300 mm. Steel 35, 45, 35Kh, 38KhA, stainless A2/A4, zinc-plated.
A bolt with a reduced head size, full metric thread and a spigot is manufactured to DIN 561. Two design forms are available: form A features a groove, form B features a thread run-out. The shank thread diameter ranges from M6 to M56, with lengths from 12 to 300 mm. Similar products are manufactured to the Russian standard GOST 1481-84; the lock bolt DIN 564 can also be considered a close analogue.
Design
The set bolt is designed for reliable fastening of parts and assemblies. It is fitted with a hexagon head convenient for tightening with a wrench. For additional positioning, a cylindrical guide spigot is provided.
Materials:
- High-strength steel 35, 45, 35Kh, 38KhA. After high-temperature treatment it reaches a property class of at least 8.8.
- Stainless and acid-resistant steels grades A2 and A4. Used in conditions of increased corrosive exposure, resistant to acid and other aggressive effects.
- Zinc-plated steel. Hot-dip galvanizing creates an additional protective layer on the surface, providing resistance to corrosion.
The choice of material depends on operating conditions. In normal conditions without increased corrosive exposure, plain steel bolts without protective coating are used — a reliable type of fastener with broad application possibilities.
Applications
The DIN 561 bolt is used for fastening metal products and secures parts and assembly structures. It is used in mechanical engineering, instrument making, machine tool building, as well as in construction, furniture manufacturing and other industries.
The set bolt is distinguished by strength, reliability and durability, and can be used to secure loaded structures. Corrosion protection extends its service life.
| d | M6 | M8 | M10 | M12 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | coarse | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 |
| fine | - | - | - | - | - | 2 | 2 | 2 | 3 | 3 | 3 | 3 | |
| k | 5 | 6 | 7 | 9 | 11 | 14 | 17 | 21 | 25 | 30 | 34 | 40 | |
| a₁ | 3 | 3.75 | 4.5 | 5.25 | 6 | 7.5 | 9 | 10.5 | 12 | 13.5 | 15 | 16.5 | |
| r | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.8 | 0.8 | 1 | 1 | 1.2 | 1.6 | 2 | |
| z₂ | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 15 | 18 | 21 | 24 | 28 | |
| dp | 4 | 5.5 | 7 | 8.5 | 12 | 15 | 18 | 23 | 28 | 32 | 38 | 45 | |
| e | 8.79 | 11.05 | 14.38 | 17.77 | 19.92 | 26.75 | 33.53 | 39.98 | 51.28 | 61.31 | 72.61 | 83.91 | |
| s | 8 | 10 | 13 | 16 | 18 | 24 | 30 | 36 | 46 | 55 | 65 | 75 | |
| l form A | min. | 10 | 12 | 16 | 25 | 30 | 40 | 45 | 60 | 60 | 80 | 90 | 100 |
| max. | 40 | 50 | 80 | 120 | 200 | 200 | 200 | 200 | 200 | 260 | 300 | 300 | |
| l form B | min. | 10 | 16 | 16 | 20 | 30 | 40 | 45 | 60 | 80 | 80 | 90 | 100 |
| max. | 70 | 100 | 200 | 200 | 200 | 200 | 200 | 200 | 200 | 260 | 300 | 300 |
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