# Buy Hexagon socket head bolt M8x40 at Autoservice ## Hexagon socket head bolt M8x40 with cylinder head and hex drive Fasteners / Bolts / Hexagon head bolts Galvanized hexagon socket head bolt M8x40, strength class 8.8, ideal for strong connections in various applications. ## Prices and stock - **SIN E8-40**: € 11,80 incl. VAT — 1 in stock ## Order URL [Hexagon socket head bolt M8x40 with cylinder head and hex drive](https://www.auto-service.be/en/fasteners/bolts/hexagon-head-bolts/inside-hexagon-bolt-m8x40-20pcs) ## Alternate URLs - **nl**: [Hexagon socket head bolt M8x40 with cylinder head and hex drive](https://www.auto-service.be/nl/bevestigingsmateriaal/bouten/binnenzeskantbouten/binnen-zeskant-bout-m8x40-20st) - **fr**: [Hexagon socket head bolt M8x40 with cylinder head and hex drive](https://www.auto-service.be/fr/materiel-de-fixation/boulons/boulons-a-six-pans-creux/boulon-hexagonal-interieur-m8x40-20-pieces) - **en**: [Hexagon socket head bolt M8x40 with cylinder head and hex drive](https://www.auto-service.be/en/fasteners/bolts/hexagon-head-bolts/inside-hexagon-bolt-m8x40-20pcs) ## Images - ![Product image](https://www.auto-service.be/assets/media/4080/conversions/binnen-zeskant-bout-m8x40-20st-161914-optimized.jpg) ## Specifications - **Reference**: SIN E8-40 - **EAN**: 8718953048070 ## Product description ### Robust hexagon socket head bolt for reliable connections This hexagon socket head bolt with a diameter of M8 and a length of 40 mm is designed for applications where a strong and reliable connection is required. Thanks to the cylinder head with hex drive, this bolt is easy to install and provides a neat finish. ### High-quality materials and finish The bolt is made of hardened steel with a strength class of 8.8, ensuring high tensile strength and durability. The electrolytically galvanized finish offers extra protection against corrosion, making the bolt suitable for both indoor and outdoor applications. ### Specifications - **Diameter** : M8 - **Length** : 40 mm - **Strength class** : 8.8 - **Material** : Hardened steel - **Surface treatment** : Electrolytically galvanized - **Standard** : DIN 912 - **Drive** : Hex (wrench size 6 mm) ### Application possibilities This hexagon socket head bolt is ideal for various construction and assembly tasks, such as: - Fastening machine parts - Assembly of metal structures - Furniture assembly ### Advantages of the hex drive The hex drive offers several advantages: - **Easy installation** : With a hex key, you can quickly and easily tighten the bolt. - **Neat finish** : The cylinder head sits flush on the surface, giving a tidy appearance. - **High torque transmission** : The hex drive allows higher torques to be applied without risking damage to the bolt head. ### Compatibility with other fasteners For optimal connection, it is recommended to combine this bolt with matching nuts and washers. This ensures a strong and secure fastening in both wood and metal constructions. ### Maintenance and storage To ensure the quality and lifespan of the bolts, it is important to store them in a dry place and avoid contact with moisture. This helps preserve the corrosion-resistant properties of the galvanized finish. ### Available packaging These hexagon socket head bolts are available in various packaging sizes, depending on your needs. Whether you need a small quantity for a specific job or a larger stock for regular use, there is always a suitable package available. ### Compliance with international standards The bolts comply with the DIN 912 standard, guaranteeing consistent quality and sizing. This makes them compatible with other DIN-standardized components and accessories. ### Safety measures when using When working with these bolts, it is important to use the correct tools and respect the recommended tightening torques. This ensures a safe and durable connection without risking damage to the bolt or the workpiece. ### Frequently asked questions **Can I use these bolts for outdoor applications?** Yes, thanks to the electrolytically galvanized finish, these bolts are suitable for outdoor use. However, for applications in highly corrosive environments, the use of stainless steel bolts is recommended. **What size hex key do I need for these bolts?** For these M8 hexagon socket head bolts, you need a hex key with a width of 6 mm. **Are other lengths available in this series?** Yes, these hexagon socket head bolts are available in various lengths. Check the range to find the right size for your application. **Can I reuse these bolts?** Reusing bolts is generally not recommended, especially in critical applications. Reuse may reduce the tensile strength, which can affect the reliability of the connection. **Are special nuts and washers required for these bolts?** It is recommended to use nuts and washers that match the strength class and size of the bolts. This ensures optimal and safe fastening. **How should I best store the bolts?** Store the bolts in a dry place and avoid exposure to moisture to maintain their corrosion-resistant properties. **Are these bolts suitable for use in wood?** Yes, these bolts can be used in wood constructions, provided the correct pre-drilling and nuts are used for a secure fastening. **What is the maximum tightening torque for these bolts?** The maximum tightening torque depends on the application and the material in which the bolt is used. Consult the technical specifications or a specialist for the correct tightening torque. **Are alternative finishes available?** Yes, in addition to the galvanized finish, hexagon socket head bolts are also available in stainless steel (A2) for applications requiring higher corrosion resistance. **Can I use these bolts with plastic materials?** Yes, these bolts can be used with plastic materials, but it is important to use the correct tightening torques to avoid damaging the plastic. ## Breadcrumbs - [Fasteners](https://www.auto-service.be/en/fasteners) - [Bolts](https://www.auto-service.be/en/fasteners/bolts) - [Hexagon head bolts](https://www.auto-service.be/en/fasteners/bolts/hexagon-head-bolts) ## Related products - [Hexagon socket head bolt 8.8 DIN912 electroplated zinc M6x50 (20 pieces)](https://www.auto-service.be/en/fasteners/bolts/hexagon-head-bolts/inner-hex-bolt-88-din912-electrolitic-zinc-plated-m6x50-20pcs) - [Hex socket head bolt 8.8 DIN912 electroplated zinc M8x10 (200 pieces)](https://www.auto-service.be/en/fasteners/bolts/hexagon-head-bolts/inner-hex-bolt-88-din912-electrolitic-zinc-plated-m8x10-200pcs) - 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