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    47 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.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    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
    Zinc-Plated Steel
    M4 × 0.7 mm127ISO Class 8
    		Fully Threaded—90009A229000000000000
    M5 × 0.8 mm158ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490009A2310000000000
    M6 × 1 mm1810ISO Class 8
    		Fully ThreadedDIN 633490009A22100000000
    M8 × 1.25 mm2413ISO Class 8
    		Fully ThreadedDIN 633490009A22200000000
    M10 × 1.5 mm3017ISO Class 8
    		Fully ThreadedDIN 633490009A22300000000
    M12 × 1.75 mm3619ISO Class 8
    		Fully ThreadedDIN 633490009A22400000000
    M14 × 2 mm4222ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490009A2320000000000
    M16 × 2 mm4824ISO Class 8
    		Fully ThreadedDIN 633490009A22500000000
    M18 × 2.5 mm5427ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490009A2330000000000
    M20 × 2.5 mm6030ISO Class 8
    		Fully ThreadedDIN 633490009A226000000000
    M22 × 2.5 mm6632ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490009A2340000000000
    M24 × 3 mm7236ISO Class 8
    		Fully ThreadedDIN 633490009A2270000000000
    M30 × 3.5 mm9046ISO Class 8
    		Fully ThreadedDIN 633490009A2280000000000
     
    Black-Oxide Steel
    M4 × 0.7 mm127ISO Class 8
    		Fully Threaded—90082A11100000000
    M5 × 0.8 mm158ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A112000000000
    M6 × 1 mm1810ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1130000000000
    M8 × 1.25 mm2413ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1140000000000
    M10 × 1.5 mm3017ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1150000000000
    M12 × 1.75 mm3619ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1160000000000
    M14 × 2 mm4222ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1170000000000
    M16 × 2 mm4824ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1180000000000
    M18 × 2.5 mm5427ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1190000000000
    M20 × 2.5 mm6030ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1210000000000
    M24 × 3 mm7236ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1230000000000
    M30 × 3.5 mm9046ISO Class 8
    		Fully ThreadedASME B18.2.2, DIN 633490082A1250000000000
     
    High-Strength Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Rated Grade 8 or Class 10, these are about 25% stronger than 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
    1-9
    10-Up
    Zinc-Plated Steel
    1/4"-20
    		7/8"1/2"SAE Grade 8
    		Fully Threaded90983A205000000000000
    1/4"-28
    		7/8"1/2"SAE Grade 8
    		Fully Threaded90983A2610000000000
    5/16"-18
    		7/8"1/2"SAE Grade 8
    		Fully Threaded90983A2060000000000
    5/16"-24
    		7/8"1/2"SAE Grade 8
    		Fully Threaded90983A2070000000000
    3/8"-16
    		1 3/4"5/8"SAE Grade 8
    		Fully Threaded90983A2110000000000
    3/8"-24
    		1 3/4"5/8"SAE Grade 8
    		Fully Threaded90983A2120000000000
    7/16"-14
    		1 3/4"3/4"SAE Grade 8
    		Fully Threaded90983A2130000000000
    7/16"-20
    		1 3/4"3/4"SAE Grade 8
    		Fully Threaded90983A2140000000000
    1/2"-13
    		1 3/4"3/4"SAE Grade 8
    		Fully Threaded90983A2170000000000
    1/2"-20
    		1 3/4"3/4"SAE Grade 8
    		Fully Threaded90983A2180000000000
    5/8"-11
    		2 1/8"15/16"SAE Grade 8
    		Fully Threaded90983A2230000000000
    5/8"-18
    		2 1/8"15/16"SAE Grade 8
    		Fully Threaded90983A2240000000000
    3/4"-10
    		2 1/4"1 1/8"SAE Grade 8
    		Fully Threaded90983A2290000000000
    3/4"-16
    		2 1/4"1 1/8"SAE Grade 8
    		Fully Threaded90983A2300000000000
    7/8"-9
    		2 1/2"1 5/16"SAE Grade 8
    		Fully Threaded90983A2340000000000
    7/8"-14
    		2 1/2"1 5/16"SAE Grade 8
    		Fully Threaded90983A2350000000000
    1"-8
    		2 3/4"1 1/2"SAE Grade 8
    		Fully Threaded90983A2400000000000
    1"-14
    		2 3/4"1 1/2"SAE Grade 8
    		Fully Threaded90983A2410000000000
    1 1/4"-7
    		3"1 7/8"SAE Grade 8
    		Fully Threaded90983A2460000000000
    1 1/4"-12
    		3"1 7/8"SAE Grade 8
    		Fully Threaded90983A2620000000000
    1 1/2"-6
    		3 1/2"2 1/4"SAE Grade 8
    		Fully Threaded90983A2510000000000
    1 1/2"-12
    		3 1/2"2 1/4"SAE Grade 8
    		Fully Threaded90983A26300000000000
     
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