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    24 Products

    Coupling Nuts

    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Medium-Strength Steel
    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.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Each
    Thread
    Size
    Lg.
    Wd.
    Fastener Strength
    Grade/Class
    Threading
    1-9
    10-49
    50-Up
    Zinc-Plated Steel
    8-32
    		5/8"1/2"SAE Grade 5
    		Fully Threaded90977A013000000000000000
    10-24
    		3/4"1/2"SAE Grade 5
    		Fully Threaded90977A017000000000000
    10-32
    		3/4"1/2"SAE Grade 5
    		Fully Threaded90977A021000000000000
    1/4"-20
    		7/8"1/2"SAE Grade 5
    		Fully Threaded90977A130000000000000
    1/4"-28
    		7/8"1/2"SAE Grade 5
    		Fully Threaded90977A140000000000000
    5/16"-18
    		1 1/8"1/2"SAE Grade 5
    		Fully Threaded90977A150000000000000
    5/16"-24
    		1 1/8"1/2"SAE Grade 5
    		Fully Threaded90977A160000000000000
    3/8"-16
    		1 3/4"5/8"SAE Grade 5
    		Fully Threaded90977A165000000000000
    3/8"-24
    		1 3/4"5/8"SAE Grade 5
    		Fully Threaded90977A170000000000000
    7/16"-14
    		1 3/4"5/8"SAE Grade 5
    		Fully Threaded90977A180000000000000
    7/16"-20
    		1 3/4"5/8"SAE Grade 5
    		Fully Threaded90977A190000000000000
    1/2"-13
    		1 3/4"3/4"SAE Grade 5
    		Fully Threaded90977A195000000000000
    1/2"-20
    		1 3/4"3/4"SAE Grade 5
    		Fully Threaded90977A034000000000000
    5/8"-11
    		2 1/8"13/16"SAE Grade 5
    		Fully Threaded90977A205000000000000
    5/8"-18
    		2 1/8"13/16"SAE Grade 5
    		Fully Threaded90977A210000000000000
    3/4"-10
    		2 1/4"1"SAE Grade 5
    		Fully Threaded90977A215000000000000
    3/4"-16
    		2 1/4"1"SAE Grade 5
    		Fully Threaded90977A22000000000000000
    7/8"-9
    		2 1/2"1 1/4"SAE Grade 5
    		Fully Threaded90977A037000000000000000
    7/8"-14
    		2 1/2"1 1/4"SAE Grade 5
    		Fully Threaded90977A225000000000000000
    1"-8
    		2 3/4"1 3/8"SAE Grade 5
    		Fully Threaded90977A038000000000000000
    1"-14
    		2 3/4"1 3/8"SAE Grade 5
    		Fully Threaded90977A230000000000000000
    1 1/8"-7
    		3"1 1/2"SAE Grade 5
    		Fully Threaded90977A235000000000000000
    1 1/4"-7
    		3"1 5/8"SAE Grade 5
    		Fully Threaded90977A240000000000000000
    1 1/2"-6
    		3 1/2"2"SAE Grade 5
    		Fully Threaded90977A245000000000000000
     
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