# Buy Hex bolt Grade 5 UNF 1/2x4.1/2 at Autoservice ## Hex bolt Grade 5 electrolytically zinc-plated UNF 1/2x4.1/2 Fasteners / Bolts / Bolts not metric High-quality hex bolt with UNF 1/2x4.1/2 thread, ideal for strong connections in automotive applications. ## Prices and stock - **SIN-BL-BNF12-412**: € 5,13 incl. VAT — backorder ## Order URL [Hex bolt Grade 5 electrolytically zinc-plated UNF 1/2x4.1/2](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unf-12x412-1st) ## Alternate URLs - **nl**: [Hex bolt Grade 5 electrolytically zinc-plated UNF 1/2x4.1/2](https://www.auto-service.be/nl/bevestigingsmateriaal/bouten/bouten-niet-metrisch/zeskantbout-grade-5-electrolitisch-verzinkt-unf-12x412-1st) - **fr**: [Hex bolt Grade 5 electrolytically zinc-plated UNF 1/2x4.1/2](https://www.auto-service.be/fr/materiel-de-fixation/boulons/boulons-non-metriques/grade-5-boulon-electrozingue-unf-12x412-1pc) - **en**: [Hex bolt Grade 5 electrolytically zinc-plated UNF 1/2x4.1/2](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unf-12x412-1st) ## Images - ![Product image](https://www.auto-service.be/assets/media/7977/conversions/zeskantbout-grade-5-electrolitisch-verzinkt-unf-12x412-1st-9254-optimized.jpg) ## Specifications - **Reference**: SIN-BL-BNF12-412 ## Product description ### Robust hex bolt for reliable connections This hex bolt with a diameter of 1/2 inch and a length of 4.1/2 inch is designed for strong and durable connections in various applications. The UNF thread ensures a fine and precise fit, which is essential in precision work. ### Grade 5 strength class for optimal performance With a strength class of Grade 5, comparable to 8.8, this bolt offers excellent tensile strength and is suitable for applications where high loads occur. This makes it ideal for use in the automotive sector and other industrial applications. ### Electrolytically zinc-plated finish for extra protection The electrolytically zinc-plated finish provides an extra layer of protection against corrosion, significantly extending the bolt's lifespan. This is especially important in environments where exposure to moisture and other corrosive elements occurs. ### Technical specifications - **Standard** : DIN 931 - **Thread type** : UNF (Unified National Fine) - **Material** : Steel - **Strength class** : Grade 5 (8.8) - **Surface treatment** : Electrolytically zinc-plated - **Wrench size** : 3/4 inch - **Head height** : 7.9 mm ### Applications in the automotive sector This hex bolt is particularly suitable for use in the automotive sector, where reliable and strong connections are crucial. Whether it's engine parts, chassis connections or other critical components, this bolt offers the reliability you need. ### Benefits at a glance - High tensile strength thanks to Grade 5 classification - Fine UNF thread for precise fit - Corrosion-resistant finish due to electrolytic zinc plating - Suitable for various industrial and automotive applications ## Breadcrumbs - [Fasteners](https://www.auto-service.be/en/fasteners) - [Bolts](https://www.auto-service.be/en/fasteners/bolts) - [Bolts not metric](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric) ## Related products - [Hex bolt Grade 5 electroplated UNC 1/2x3 inch (5 pieces)](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unc-12x3in-5st) - [Hex bolt Grade 5 Electrolytically Zinc Plated UNC 1/4x2.1/2 (5 pieces)](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unc-14x212-5pcs) - [Hex bolt Grade 5 electroplated UNC 5/16x2.1/4 (5 pieces)](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unc-516x214-5pcs) - 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