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    24 Products
    About Pipe and Fittings
    industrial info icon

    Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

    Low-Pressure Iron and Steel Unthreaded Pipe Flanges

    Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point in a pipe line. Flanges are for use with low-pressure applications in noncorrosive environments.
    Flanges
    Image of Product. Slip-On Weld: Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Slip-On Weld Female, Raised Surface.
    Image of Product. Slip-On Weld: Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Flanges, Slip-On Weld Female, Raised Surface.

    Slip-On

    Weld:

    Front

    Slip-On

    Weld:

    Raised

    Surface

    on Back

    Slip-on-Weld Fitting Connection—Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
    Pipe
    Size
    Bolt
    Hole
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    Slip-On Weld Female
    1
    		1
    		Raised4 59/64"5/8"0.748"43 35/64"Steel
    		Not RatedNot Rated1752N14000000
    1 1/2
    		1 1/2
    		Raised5 33/64"5/8"0.748"44 9/64"Steel
    		Not RatedNot Rated1752N1500000
    2
    		2
    		Raised6 7/64"5/8"0.748"44 23/32"Steel
    		Not RatedNot Rated1752N1600000
     
    Blind Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Blind Flanges, Flanged, Raised.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Low-Pressure Iron and Steel Unthreaded Pipe Flanges, Blind Flanges, Flanged, Raised.

    Front

    Raised

    Surface

    on Back

    Bolt
    Hole
    Pipe
    Size
    Flanged Connection
    Surface
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    Flanged
    1
    		Raised4 59/64"5/8"0.748"43 35/64"Steel
    		Not RatedNot Rated1752N17000000
    1 1/2
    		Raised5 33/64"5/8"0.748"44 9/64"Steel
    		Not RatedNot Rated1752N1800000
     

    JIS Flange Nuts

    Fasten parts and components that are made to Japanese Industrial Standards. These nuts have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. Since the flange covers a larger area than standard nuts, these are ideal for securing screws in oversized or irregularly shaped holes. Also known as collar nuts.
    Medium-Strength Steel
    Image of Product. Front orientation. Flange Nuts. JIS Flange Nuts.
    Rated Grade 5, Grade F, or Class 8, these nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Flange,
    mm
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    JIS
    Specification
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M3 × 0.5 mm5.53.780.6Class 8
    		JIS B 1190
    		10090438A110000000
    M4 × 0.7 mm74.210.50.6Class 8
    		JIS B 1190
    		10090438A12000000
    M5 × 0.8 mm8511.80.7Class 8
    		JIS B 1190
    		10090438A13000000
    M6 × 1 mm106140.8Class 8
    		JIS B 1190
    		10090438A14000000
    M8 × 1 mm12817.51.1Class 8
    		JIS B 1190
    		1090438A16000000
    M8 × 1.25 mm12817.51.1Class 8
    		JIS B 1190
    		2590438A15000000
    M10 × 1 mm1410211.2Class 8
    		JIS B 1190
    		1090438A17000000
    M10 × 1.25 mm1410211.2Class 8
    		JIS B 1190
    		590438A1800000
    M12 × 1.25 mm1711.5251.4Class 8
    		JIS B 1190
    		590438A2100000
    M12 × 1.75 mm1711.5251.4Class 8
    		JIS B 1190
    		590438A1900000
     
    High-Strength Steel
    Image of Product. Front orientation. Flange Nuts. JIS Flange Nuts.
    Rated Grade 8, Grade G, or Class 10, these are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, and motors. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that withstands occasional exposure to moisture.
    Flange,
    mm
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    JIS
    Specification
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M5 × 0.8 mm8511.80.7Class 10
    		JIS B 1190
    		—5095108A10800000
    M6 × 1 mm106140.8Class 10
    		JIS B 1190
    		—10095108A1040000
    M8 × 1.25 mm12817.51Class 10
    		JIS B 1190
    		Material Certificate
    		5095108A1050000
    M10 × 1 mm1410211.2Class 10
    		JIS B 1190
    		—195108A1090000
    M10 × 1.25 mm1410211.2Class 10
    		JIS B 1190
    		—1095108A10600000
    M12 × 1.25 mm1711.5251.4Class 10
    		JIS B 1190
    		Material Certificate
    		2595108A1070000
     
    Black Phosphate-Coated Steel
    M6 × 1 mm106140.8Class 10
    		JIS B 1190
    		—10095108A10100000
    M8 × 1.25 mm12817.51.1Class 10
    		JIS B 1190
    		—10095108A10200000
    M10 × 1.25 mm1410211.2Class 10
    		JIS B 1190
    		Material Certificate
    		5095108A10300000
     
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