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    12 Products

    Coupling Nuts

    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Medium-Strength Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    These Grade 5 or Class 8 nuts are about twice as strong as low-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Fastener Strength
    Grade/Class
    Threading
    Specs. Met
    1-9
    10-Up
    Black-Oxide Steel
    M4 × 0.7 mm127ISO Class 8
    		Fully Threaded—0000000000000000000
    M5 × 0.8 mm158ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 6334000000000000000000
    M6 × 1 mm1810ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M8 × 1.25 mm2413ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M10 × 1.5 mm3017ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M12 × 1.75 mm3619ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M14 × 2 mm4222ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M16 × 2 mm4824ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M18 × 2.5 mm5427ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M20 × 2.5 mm6030ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M24 × 3 mm7236ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
    M30 × 3.5 mm9046ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 63340000000000000000000
     
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