3/8" UNF x 3" Hexagon Bolts, Self Colour Steel 8.8

    Description

    When strength matters and shortcuts aren’t an option, these 3/8" UNF Hexagon Bolts step in like the quiet workhorse of your toolkit. Built from high tensile steel (Grade 8.8), they deliver reliable clamping force and durability for demanding mechanical and structural applications.

    • Thread Type: 3/8" UNF (Unified National Fine) – ideal for precision fastening with higher thread engagement
    • Head Type: Hexagon – easy installation with standard spanners or sockets
    • Material: High tensile steel
    • Grade: 8.8 – engineered for strength and resilience under load
    • Finish: Self colour (plain/oil finish) – perfect for applications where coating isn’t required or where further finishing is applied

    Grade 8.8 bolts offer an excellent balance of strength and toughness, making them suitable for:

    • Automotive assemblies
    • Machinery and engineering projects
    • Construction and structural connections
    • General industrial use

    The fine UNF thread provides tighter fastening and improved resistance to loosening under vibration, giving your assemblies that extra bit of staying power.

    3/8" UNF x 3" Hexagon Bolts, Self Colour Steel 8.8

      Product form

      96 in stock

      £0.66 Excl. VAT

      Free pickup in SY10 0BZ

      SKU: S-HEXBOLT-3/8UNF-3

      • Want this tomorrow? Order within: Jun 07, 2026 14:00:00 +0100
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        Description

        When strength matters and shortcuts aren’t an option, these 3/8" UNF Hexagon Bolts step in like the quiet workhorse of your toolkit. Built from high tensile steel (Grade 8.8), they deliver reliable clamping force and durability for demanding mechanical and structural applications.

        • Thread Type: 3/8" UNF (Unified National Fine) – ideal for precision fastening with higher thread engagement
        • Head Type: Hexagon – easy installation with standard spanners or sockets
        • Material: High tensile steel
        • Grade: 8.8 – engineered for strength and resilience under load
        • Finish: Self colour (plain/oil finish) – perfect for applications where coating isn’t required or where further finishing is applied

        Grade 8.8 bolts offer an excellent balance of strength and toughness, making them suitable for:

        • Automotive assemblies
        • Machinery and engineering projects
        • Construction and structural connections
        • General industrial use

        The fine UNF thread provides tighter fastening and improved resistance to loosening under vibration, giving your assemblies that extra bit of staying power.

        Measurements: Every effort has been made to ensure all measurements on our site are accurate and to the relevant standard; they should only be used as a guide. If you see a problem with our specifications please contact us.

        Dimensions: Our stock is sourced from various suppliers, therefore differences may exist between batches such as height, width, visible stamped markings, appearance or actual finish.

        Photos: All photos are for illustration purposes only. Actual product or packaging may vary due to product enhancement.

        Disclaimer: Technical data and specifications were researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Frank's Fasteners is not responsible for any loss, claim or damages arising therefrom. In developing this information, Frank's Fasteners has made a determined effort to present it accurately.

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