# Buy Hex bolt Grade 5 UNF 3/4x3.1/2 at Autoservice ## Hex bolt Grade 5 electroplated UNF 3/4x3.1/2 Fasteners / Bolts / Bolts not metric High-quality hex bolt with fine UNF thread, ideal for precise applications. ## Prices and stock - **SIN-BL-BNF34-312**: € 13,06 incl. VAT — backorder ## Order URL [Hex bolt Grade 5 electroplated UNF 3/4x3.1/2](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unf-34x312-1st) ## Alternate URLs - **nl**: [Hex bolt Grade 5 electroplated UNF 3/4x3.1/2](https://www.auto-service.be/nl/bevestigingsmateriaal/bouten/bouten-niet-metrisch/zeskantbout-grade-5-electrolitisch-verzinkt-unf-34x312-1st) - **fr**: [Hex bolt Grade 5 electroplated UNF 3/4x3.1/2](https://www.auto-service.be/fr/materiel-de-fixation/boulons/boulons-non-metriques/grade-5-boulon-electrozingue-unf-34x312-1pc) - **en**: [Hex bolt Grade 5 electroplated UNF 3/4x3.1/2](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unf-34x312-1st) ## Images - ![Product image](https://www.auto-service.be/assets/media/7987/conversions/zeskantbout-grade-5-electrolitisch-verzinkt-unf-34x312-1st-9264-optimized.jpg) ## Specifications - **Reference**: SIN-BL-BNF34-312 - **Materiaal**: Staal - **Diameter ⌀**: 3/4" - **Lengte (product)**: 3.5 mm - **Spoed**: 2.54 mm - **Sleutelwijdte**: 1/8" - **Normering**: DIN 931 - **Oppervlakte Bedekking**: Electrolitisch Verzinkt - **Soort kop**: Zeskant - **Aantal in verpakking**: 1 - **ADR Classificatie**: Geen ADR Classificatie - **Material**: Steel - **Length (product)**: 3.5 mm - **Spindle**: 2.54 mm - **Key width**: 1/8" - **Standard**: DIN 931 - **Surface Coverage**: Electrolytic Galvanized - **Head type**: Zeskant - **Quantity in packaging unit**: 1 - **ADR Classification**: No ADR Classification ## Product description ### Robust construction for reliable connections This hex bolt is made from Grade 5 steel, equivalent to strength class 8.8. This guarantees high tensile strength and durability, essential for demanding applications in the automotive sector and mechanical engineering. ### Fine UNF thread for precise assembly With a Unified National Fine (UNF) thread of 3/4 inch diameter and 16 threads per inch, this bolt offers a tighter fit and higher thread strength. This is particularly useful in situations where vibrations and dynamic loads occur. ### Electroplated finish for extra protection The electroplated coating protects the bolt against corrosion and wear, extending its lifespan and increasing reliability, even in humid or corrosive environments. ### Compliance with international standards This hex bolt meets the ASME B18.2.1 standard, ensuring consistency in dimensions and performance. This makes it easy to integrate the bolt into existing systems and applications. ### Suitable for various applications - Fastening engine components - Assembly of transmission systems - Construction of chassis and frames ### Technical specifications - Diameter: 3/4 inch - Length: 3.1/2 inch - Thread: UNF, 16 threads per inch - Material: Grade 5 steel - Surface treatment: Electroplated - Standard: ASME B18.2.1 ### Key benefits - High tensile strength for heavy loads - Fine thread for precise and strong connections - Corrosion-resistant finish for longer lifespan - Compatible with international standards for easy integration ## 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 3/8x5 inch (5 pieces)](https://www.auto-service.be/en/fasteners/bolts/bolts-not-metric/hex-bolt-grade-5-electrolitic-zinc-plated-unc-38x5in-5st) - 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