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    12 Products

    Coupling Nuts with Sight Hole

    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts with Sight Hole.
    Confirm that threads are fastened to the right depth at a glance. If you see threads through the sight hole, you'll know that they are properly engaged to ensure a strong hold. Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Low-Strength Steel
    Rated Grade 2 or lower, these are about half as strong as medium-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
    Sight Hole
    Dia.
    1-9
    10-Up
    Zinc-Plated Steel
    8-32
    		5/8"5/16"SAE Grade 2
    		Fully Threaded1/16"93525A2770000000000
    10-24
    		3/4"5/16"SAE Grade 2
    		Fully Threaded5/64"93525A28000000000
    10-32
    		3/4"5/16"SAE Grade 2
    		Fully Threaded5/64"93525A28300000000
    1/4"-20
    		3/4"3/8"SAE Grade 2
    		Fully Threaded3/32"93525A28600000000
    1/4"-28
    		3/4"3/8"SAE Grade 2
    		Fully Threaded3/32"93525A28900000000
    5/16"-18
    		15/16"1/2"SAE Grade 2
    		Fully Threaded3/32"93525A29200000000
    3/8"-16
    		1 1/8"9/16"SAE Grade 2
    		Fully Threaded1/8"93525A30100000000
    3/8"-24
    		1 1/8"9/16"SAE Grade 2
    		Fully Threaded1/8"93525A29800000000
    1/2"-13
    		1 1/2"3/4"SAE Grade 2
    		Fully Threaded3/16"93525A30800000000
    5/8"-11
    		1 7/8"15/16"SAE Grade 2
    		Fully Threaded3/16"93525A31500000000
    3/4"-10
    		2 1/4"1 1/8"SAE Grade 2
    		Fully Threaded3/16"93525A32200000000
    1"-8
    		3"1 1/2"SAE Grade 2
    		Fully Threaded1/4"93525A3290000000000
     
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