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    264 Products

    Flange Nuts

    No need for a separate washer—these nuts have a plain flange that distributes pressure evenly for a wide variety of fastening applications. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.
    Medium-Strength Steel
    Image of Product. Front orientation. Flange Nuts. 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.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Flange
    Thread Size
    Wd.
    Ht.
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"-20
    7/16"15/64"19/32"0.04"SAE Grade 5
    10094842A101000000
    5/16"-18
    1/2"9/32"11/16"0.04"SAE Grade 5
    10094842A10200000
    3/8"-16
    9/16"11/32"3/4"0.04"SAE Grade 5
    10094842A10300000
    1/2"-13
    3/4"29/64"1 1/32"0.05"SAE Grade 5
    5094842A10400000
    5/8"-11
    15/16"9/16"1 9/32"0.05"SAE Grade 5
    1094842A1050000
    M3 × 0.5 mm5.5 mm4 mm8 mm0.8 mmISO Class 8
    DIN 69235090374A2110000
    M4 × 0.7 mm7 mm4.65 mm10 mm1.65 mmISO Class 8
    DIN 6923, ISO 416110090374A1100000
    M5 × 0.8 mm8 mm5 mm11.8 mm2.8 mmISO Class 8
    DIN 6923, ISO 416110090374A1110000
    M6 × 1 mm10 mm6 mm14.2 mm2.9 mmISO Class 8
    DIN 6923, ISO 416110090374A1120000
    M8 × 1 mm13 mm8 mm17.9 mm3.5 mmISO Class 8
    DIN 6923, ISO 41615090374A11300000
    M8 × 1.25 mm13 mm8 mm17.9 mm3.5 mmISO Class 8
    DIN 6923, ISO 416110090374A11400000
    M10 × 1.25 mm15 mm10 mm21.8 mm4.5 mmISO Class 8
    DIN 6923, ISO 41615090374A11500000
    M10 × 1.5 mm15 mm10 mm21.8 mm4.5 mmISO Class 8
    DIN 6923, ISO 41615090374A11600000
    M12 × 1.25 mm18 mm12 mm26 mm5.3 mmISO Class 8
    DIN 6923, ISO 41612590374A11700000
    M12 × 1.5 mm18 mm12 mm26 mm5.3 mmISO Class 8
    DIN 6923, ISO 41611090374A1180000
    M12 × 1.75 mm18 mm12 mm26 mm5.3 mmISO Class 8
    DIN 6923, ISO 41612590374A11900000
    M14 × 2 mm21 mm14 mm29.9 mm6.2 mmISO Class 8
    DIN 6923, ISO 41611090374A12000000
    M16 × 1.5 mm24 mm16 mm34.5 mm7 mmISO Class 8
    DIN 6923, ISO 4161190374A1210000
    M16 × 2 mm24 mm16 mm34.5 mm7 mmISO Class 8
    DIN 6923, ISO 41611090374A12200000
    M20 × 2.5 mm30 mm20 mm42.8 mm9 mmISO Class 8
    DIN 6923, ISO 4161590374A12300000
     
    Steel
    M6 × 1 mm10 mm6 mm14.2 mm1.1 mmISO Class 8
    DIN 692310090374A2120000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.2 mmISO Class 8
    DIN 69235090374A2130000
    M10 × 1.25 mm15 mm10 mm21.8 mm1.5 mmISO Class 8
    DIN 69232590374A2150000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.5 mmISO Class 8
    DIN 69232590374A2160000
    M12 × 1.25 mm18 mm12 mm26 mm1.8 mmISO Class 8
    DIN 69231090374A2180000
    M12 × 1.5 mm18 mm12 mm26 mm1.8 mmISO Class 8
    DIN 69231090374A2190000
    M12 × 1.75 mm18 mm12 mm26 mm1.8 mmISO Class 8
    DIN 69232590374A2170000
    M16 × 1.5 mm24 mm16 mm34.5 mm2.4 mmISO Class 8
    DIN 6923590374A2210000
    M16 × 2 mm24 mm16 mm34.5 mm2.4 mmISO Class 8
    DIN 69231090374A2140000
     
    High-Strength Steel
    Image of Product. Front orientation. Flange Nuts. 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.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that's more durable than clear zinc plating.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Flange
    Thread Size
    Wd.
    Ht.
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"-20
    7/16"15/64"19/32"0.06"SAE Grade 8
    10094612A101000000
    5/16"-18
    1/2"9/32"11/16"0.07"SAE Grade 8
    10094612A10200000
    3/8"-16
    9/16"11/32"3/4"0.08"SAE Grade 8
    5094612A10300000
    1/2"-13
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    2594612A10400000
    5/8"-11
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    1094612A10500000
    3/4"-10
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    1094612A10600000
    3/4"-16
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    594612A10700000
    M5 × 0.8 mm8 mm5 mm11.8 mm1 mmISO Class 10
    DIN 6923, ISO 41612595003A20100000
    M6 × 1 mm10 mm6 mm14.2 mm1.1 mmISO Class 10
    DIN 6923, ISO 416110095003A1010000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.2 mmISO Class 10
    DIN 6923, ISO 416110095003A10200000
    M10 × 1.25 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41611095003A2160000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41615095003A10300000
    M12 × 1.25 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161595003A2170000
    M12 × 1.5 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161595003A2180000
    M12 × 1.75 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 41612595003A1040000
    M14 × 1.5 mm21 mm14 mm29.9 mm2.1 mmISO Class 10
    DIN 6923, ISO 41611095003A21400000
    M16 × 1.5 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 4161195003A2190000
    M16 × 2 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 41611095003A10500000
    M20 × 2.5 mm30 mm20 mm42.8 mm3 mmISO Class 10
    DIN 6923, ISO 4161195003A2150000
    M24 × 3 mm36 mm24 mm51 mm3.6 mmISO Class 10
    DIN 6923, ISO 4161195003A20400000
     
    Zinc-Yellow-Chromate-Plated Steel
    1/4"-20
    7/16"15/64"19/32"0.06"SAE Grade 8
    1091627A1150000
    5/16"-18
    1/2"9/32"11/16"0.07"SAE Grade 8
    1091627A1160000
    3/8"-16
    9/16"11/32"3/4"0.08"SAE Grade 8
    1091627A1170000
    1/2"-13
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    1091627A1180000
    5/8"-11
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    591627A11100000
    5/8"-18
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    591627A11200000
    3/4"-10
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    191627A1130000
    3/4"-16
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    191627A1140000
    1"-8
    1 1/2"57/64"2 1/16"0.21"SAE Grade 8
    191627A1190000
    M6 × 1 mm10 mm6 mm14.2 mm1.1 mmISO Class 10
    DIN 6923, ISO 41615097765A1100000
    M8 × 1.25 mm13 mm8 mm17.5 mm1.2 mmISO Class 10
    DIN 6923, ISO 41612597765A1200000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41611097765A1300000
    M12 × 1.25 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161597765A15000000
    M12 × 1.5 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161597765A16000000
    M12 × 1.75 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 41611097765A1400000
    M14 × 2 mm21 mm14 mm29.9 mm2.1 mmISO Class 10
    DIN 6923, ISO 4161597765A1700000
    M16 × 1.5 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 4161197765A1800000
    M16 × 2 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 4161597765A1900000
    M20 × 2.5 mm30 mm20 mm42.8 mm3 mmISO Class 10
    DIN 6923, ISO 4161197765A2100000
     
    Black Phosphate-Coated Steel
    1/4"-20
    7/16"15/64"19/32"0.06"SAE Grade 8
    10094902A10100000
    1/4"-28
    7/16"15/64"19/32"0.06"SAE Grade 8
    10094902A11100000
    5/16"-18
    1/2"9/32"11/16"0.07"SAE Grade 8
    10094902A10200000
    5/16"-24
    1/2"9/32"11/16"0.07"SAE Grade 8
    10094902A11200000
    3/8"-16
    9/16"11/32"3/4"0.07"SAE Grade 8
    5094902A1030000
    1/2"-13
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    2594902A10400000
    1/2"-20
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    2594902A10500000
    5/8"-11
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    1094902A10600000
    5/8"-18
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    1094902A10700000
    3/4"-10
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    1094902A10800000
    3/4"-16
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    1094902A10900000
    7/8"-14
    1 5/16"51/64"1 3/4"0.19"SAE Grade 8
    194902A1130000
    M5 × 0.8 mm8 mm5 mm11.8 mm1 mmISO Class 10
    DIN 6923, ISO 416110094942A1110000
    M6 × 1 mm10 mm6 mm14.2 mm1.1 mmISO Class 10
    DIN 6923, ISO 416110094942A10100000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.2 mmISO Class 10
    DIN 6923, ISO 416110094942A10200000
    M10 × 1.25 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41611094942A10600000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41615094942A10300000
    M12 × 1.25 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161594942A10700000
    M12 × 1.5 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 4161594942A10800000
    M12 × 1.75 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 41612594942A10400000
    M16 × 1.5 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 4161194942A1090000
    M16 × 2 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 41611094942A10500000
     
    Steel
    1/4"-20
    7/16"15/64"19/32"0.06"SAE Grade 8
    10091094A11100000
    1/4"-28
    7/16"15/64"19/32"0.06"SAE Grade 8
    10091094A11200000
    5/16"-18
    1/2"9/32"11/16"0.07"SAE Grade 8
    2591094A11300000
    3/8"-16
    9/16"11/32"3/4"0.08"SAE Grade 8
    1091094A1140000
    1/2"-13
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    1091094A1150000
    1/2"-20
    3/4"29/64"1 1/32"0.1"SAE Grade 8
    1091094A11600000
    9/16"-18
    7/8"1/2"1 3/16"0.11"SAE Grade 8
    591094A11700000
    5/8"-11
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    591094A11800000
    5/8"-18
    15/16"9/16"1 9/32"0.12"SAE Grade 8
    591094A11900000
    3/4"-10
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    191094A1200000
    3/4"-16
    1 1/8"21/32"1 1/2"0.16"SAE Grade 8
    191094A1210000
    7/8"-9
    1 5/16"51/64"1 3/4"0.19"SAE Grade 8
    191094A1220000
    1"-8
    1 1/2"57/64"2 1/16"0.21"SAE Grade 8
    191094A1230000
    1"-14
    1 1/2"57/64"2 1/16"0.21"SAE Grade 8
    191094A1240000
    M5 × 0.8 mm8 mm5 mm11.8 mm1 mmISO Class 10
    DIN 6923, ISO 416110095003A20500000
    M6 × 1 mm10 mm6 mm14.2 mm1.1 mmISO Class 10
    DIN 6923, ISO 416110095003A20600000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.2 mmISO Class 10
    DIN 6923, ISO 41615095003A2070000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.5 mmISO Class 10
    DIN 6923, ISO 41615095003A20800000
    M12 × 1.75 mm18 mm12 mm26 mm1.8 mmISO Class 10
    DIN 6923, ISO 41612595003A20900000
    M14 × 2 mm21 mm14 mm29.9 mm2.1 mmISO Class 10
    DIN 6923, ISO 41611095003A2110000
    M16 × 2 mm24 mm16 mm34.5 mm2.4 mmISO Class 10
    DIN 6923, ISO 41611095003A21200000
    M20 × 2.5 mm30 mm20 mm42.8 mm3 mmISO Class 10
    DIN 6923, ISO 4161595003A21300000
     
    Low-Strength Steel
    Image of Product. Front orientation. Flange Nuts. Flange Nuts.
    About half the strength of medium-strength steel nuts, these are suitable for light duty fastening applications, such as securing access panels. Use them with screws that have a similar 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—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Flange
    Thread Size
    Wd.
    Ht.
    Dia.
    Thk.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M5 × 0.8 mm8 mm6 mm14 mm1.5 mm191005A10100000
    M6 × 1 mm10 mm8 mm16 mm2 mm191005A1020000
    M8 × 1.25 mm13 mm10 mm19 mm2.5 mm191005A1030000
    M10 × 1.5 mm17 mm13 mm22 mm3 mm191005A1040000
    M12 × 1.75 mm19 mm17 mm27 mm4 mm191005A1050000
    M16 × 2 mm24 mm21 mm33 mm5 mm191005A1060000
     
    Black-Oxide Steel
    1/4"-20
    1/2"5/16"5/8"0.09"491030A02800000
    1/4"-28
    1/2"5/16"5/8"0.09"491030A42000000
    5/16"-18
    9/16"3/8"3/4"0.13"491030A02900000
    5/16"-24
    9/16"3/8"3/4"0.13"491030A42500000
    3/8"-16
    11/16"1/2"7/8"0.13"491030A03100000
    3/8"-24
    11/16"1/2"7/8"0.13"491030A43000000
    7/16"-14
    3/4"9/16"1"0.16"491030A03200000
    7/16"-20
    3/4"9/16"1"0.16"491030A43500000
    1/2"-13
    7/8"11/16"1 1/8"0.19"491030A03300000
    1/2"-20
    7/8"11/16"1 1/8"0.19"491030A44000000
    5/8"-11
    1 1/16"13/16"1 3/8"0.19"491030A03500000
    5/8"-18
    1 1/16"13/16"1 3/8"0.19"191030A4450000
    3/4"-10
    1 1/4"1"1 5/8"0.25"191030A0360000
    3/4"-16
    1 1/4"1"1 5/8"0.25"191030A4500000
    7/8"-9
    1 7/16"1 1/8"1 3/4"0.25"191030A0370000
    7/8"-14
    1 7/16"1 1/8"1 3/4"0.25"191030A4550000
    1"-8
    1 5/8"1 1/4"2"0.25"191030A03800000
    1"-14
    1 5/8"1 1/4"2"0.25"191030A46000000
    1 1/4"-7
    1 13/16"1 1/4"2 1/2"0.25"191030A04000000
    M6 × 1 mm10 mm8 mm16 mm2 mm191005A0330000
    M8 × 1.25 mm13 mm10 mm19 mm2.5 mm191005A0350000
    M10 × 1.5 mm17 mm13 mm22 mm3 mm191005A0370000
    M12 × 1.75 mm19 mm17 mm27 mm4 mm191005A0380000
    M16 × 2 mm24 mm21 mm33 mm5 mm191005A0390000
    M20 × 2.5 mm30 mm25 mm40 mm6 mm191005A0410000
    M24 × 3 mm36 mm32 mm49 mm7 mm191005A04500000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Flange Nuts. Flange Nuts.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Super-Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant flange nuts, these hold up in just about any environment, including harsh weather, salt water, and most chemicals.
    Flange
    Thread Size
    Wd.
    Ht.
    Dia.
    Thk.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    2-56
    1/8"3/32"11/64"0.02"194758A20100000
    3-48
    15/64"1/8"15/64"0.03"194758A2020000
    3-56
    15/64"1/8"15/64"0.03"194758A2030000
    4-40
    1/4"7/32"3/8"0.05"194758A1010000
    5-40
    5/16"11/64"13/32"0.05"194758A2040000
    6-32
    5/16"7/32"13/32"0.05"194758A1020000
    6-40
    5/16"11/64"13/32"0.05"194758A2050000
    8-32
    11/32"1/4"15/32"0.06"194758A1030000
    10-24
    3/8"5/16"1/2"0.06"194758A1040000
    10-32
    3/8"5/16"1/2"0.06"194758A1050000
    12-24
    3/8"7/32"1/2"0.06"194758A1060000
    1/4"-20
    1/2"5/16"5/8"0.09"194758A0280000
    1/4"-28
    1/2"5/16"5/8"0.09"194758A6150000
    5/16"-18
    9/16"3/8"3/4"0.13"194758A0290000
    5/16"-24
    9/16"3/8"3/4"0.09"194758A6250000
    3/8"-16
    11/16"1/2"7/8"0.13"194758A0310000
    3/8"-24
    11/16"1/2"7/8"0.13"194758A6350000
    7/16"-14
    3/4"9/16"1"0.16"194758A0320000
    7/16"-20
    3/4"9/16"1"0.16"194758A6450000
    1/2"-13
    7/8"11/16"1 1/8"0.16"194758A03300000
    1/2"-20
    7/8"11/16"1 1/8"0.16"194758A65500000
    5/8"-11
    1 1/16"13/16"1 3/8"0.19"194758A03500000
    5/8"-18
    1 1/16"13/16"1 3/8"0.19"194758A66500000
    3/4"-10
    1 1/4"1"1 5/8"0.25"194758A03600000
    3/4"-16
    1 1/4"1"1 5/8"0.25"194758A67500000
    7/8"-9
    1 7/16"1 1/8"1 3/4"0.25"194758A03700000
    1"-8
    1 5/8"1 1/4"2"0.25"194758A03800000
    1"-14
    1 5/8"1 1/4"2"0.25"194758A69500000
    1 1/4"-7
    1 13/16"1 1/4"2 1/4"0.25"194758A70000000
    M3 × 0.5 mm5.5 mm4 mm8 mm1 mmDIN 6923, ISO 416110093033A1070000
    M4 × 0.7 mm7 mm4 mm10 mm0.9 mmDIN 6923, ISO 41615093033A10500000
    M5 × 0.8 mm8 mm5 mm11.8 mm1 mmDIN 6923, ISO 41615093033A10600000
    M6 × 1 mm10 mm6 mm14.2 mm1.19 mmDIN 6923, ISO 41615093033A1010000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.31 mmDIN 6923, ISO 41612593033A1020000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.81 mmDIN 6923, ISO 41611093033A1030000
    M12 × 1.75 mm18 mm12 mm26 mm2.2 mmDIN 6923, ISO 41611093033A10400000
     
    Super-Corrosion-Resistant 316 Stainless Steel
    8-32
    11/32"13/64"15/32"0.06"5090389A1110000
    10-24
    3/8"7/32"1/2"0.06"5090389A11200000
    10-32
    3/8"7/32"1/2"0.06"5090389A11300000
    1/4"-20
    7/16"15/64"19/32"0.09"5090389A11400000
    5/16"-18
    1/2"9/32"11/16"0.13"2590389A1150000
    3/8"-16
    9/16"11/32"3/4"0.13"2590389A11600000
    1/2"-13
    3/4"29/64"1 1/64"0.16"1090389A11700000
    M3 × 0.5 mm5.5 mm4 mm8 mm0.7 mmDIN 692310094777A1050000
    M4 × 0.7 mm7 mm4 mm10 mm0.9 mmDIN 692310094777A10600000
    M5 × 0.8 mm8 mm5 mm11.8 mm1 mmDIN 692310094777A10700000
    M6 × 1 mm10 mm6 mm14.2 mm1.19 mmDIN 69235094777A10100000
    M8 × 1.25 mm13 mm8 mm17.9 mm1.31 mmDIN 69231094777A1020000
    M10 × 1.5 mm15 mm10 mm21.8 mm1.81 mmDIN 69231094777A1030000
    M12 × 1.75 mm18 mm12 mm26 mm2.2 mmDIN 6923594777A1040000
     

    High-Profile Flange Nuts

    30% taller than standard-profile nuts, these have a large gripping area so your wrench or socket won't slip off as you tighten them. They also engage more threads for extra gripping power. Nuts have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.
    High-Strength Steel
    Image of Product. Bottom orientation. Flange Nuts. High-Profile 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.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Flange,
    mm
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Steel
    M6 × 1 mm109143ISO Class 10
    DIN 63315090360A111000000
    M8 × 1.25 mm1312183.5ISO Class 10
    DIN 63312590360A11200000
    M10 × 1.5 mm1615224ISO Class 10
    DIN 63311090360A11300000
    M12 × 1.75 mm1818254ISO Class 10
    DIN 63311090360A11400000
    M14 × 2 mm2221284ISO Class 10
    DIN 6331590360A11500000
    M16 × 2 mm2424315ISO Class 10
    DIN 6331590360A11700000
    M18 × 2.5 mm2727345ISO Class 10
    DIN 6331190360A1180000
    M20 × 2.5 mm3030376ISO Class 10
    DIN 6331190360A1190000
    M24 × 3 mm3636456ISO Class 10
    DIN 6331190360A12100000
    M30 × 3.5 mm4645588ISO Class 10
    DIN 6331190360A12200000
    M36 × 4 mm55546810ISO Class 10
    DIN 6331190360A12300000
     

    Self-Aligning Flange Nuts

    Clamp workpieces that aren't perfectly parallel to the mounting surface. Also known as spherical collar nuts, these have a curved base and washer that fit snugly together and swivel to compensate for slight misalignment. Nuts distribute pressure evenly as they tighten to prevent damage to the part.
    Height includes the nut and the washer.
    Steel
    Image of ProductInUse. Front orientation. Flange Nuts. Self-Aligning Flange Nuts.
    Image of Product. Front orientation. Flange Nuts. Self-Aligning Flange Nuts.
    Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Flange
    Washer
    Thread
    Size
    Wd.
    Ht.
    Dia.
    Thk.
    Max.
    Correction
    Thk.
    Material
    Each
    Black-Oxide Steel
    1/4"-20
    1/2"7/16"5/8"0.09"2 1/2°1/8"Steel91045A02900000
    5/16"-18
    9/16"17/32"3/4"0.13"1 1/2°5/32"Steel91045A0300000
    3/8"-16
    11/16"21/32"7/8"0.13"5/32"Steel91045A0310000
    1/2"-13
    7/8"7/8"1 1/8"0.19"3/16"Steel91045A0330000
    5/8"-11
    1 1/16"1 1/32"1 3/8"0.19"7/32"Steel91045A0350000
    3/4"-10
    1 1/4"1 17/64"1 5/8"0.25"1 1/2°17/64"Steel91045A0360000
    1"-8
    1 5/8"1 35/64"2"0.25"1 1/2°19/64"Steel91045A03800000
     
    Corrosion-Resistant Stainless Steel
    Image of ProductInUse. Front orientation. Flange Nuts. Self-Aligning Flange Nuts.
    Image of Product. Front orientation. Flange Nuts. Self-Aligning Flange Nuts.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Flange
    Washer
    Thread
    Size
    Wd.
    Ht.
    Dia.
    Thk.
    Max.
    Correction
    Thk.
    Material
    Each
    18-8 Stainless Steel
    1/4"-20
    1/2"7/16"5/8"0.09"2 1/2°1/8"18-8 Stainless Steel
    91346A200000000
    5/16"-18
    9/16"17/32"3/4"0.09"1 1/2°11/64"18-8 Stainless Steel
    91346A21000000
    3/8"-16
    11/16"21/32"7/8"0.13"11/64"18-8 Stainless Steel
    91346A22000000
    1/2"-13
    7/8"7/8"1 1/8"0.16"7/32"18-8 Stainless Steel
    91346A23000000
    5/8"-11
    1 1/16"1 1/32"1 3/8"0.19"7/32"18-8 Stainless Steel
    91346A24000000
    3/4"-10
    1 1/4"1 17/64"1 5/8"0.25"1 1/2°1/4"18-8 Stainless Steel
    91346A25000000
     

    Rotating Flange Nuts

    The head of these nuts rotates while the flange remains stationary, so you won't scratch the surface of finished parts as you tighten. They distribute pressure evenly across the mounting surface without the need for a separate washer. Also known as collar nuts.
    Steel
    Image of Product. Front orientation. Contains Annotated. Flange Nuts. Rotating Flange Nuts.
    Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Flange
    Thread Size
    Wd.
    Ht.
    Dia.
    Thk.
    Material
    Each
    Black-Oxide Steel
    1/4"-20
    1/2"3/8"5/8"0.13"Steel90477A02900000
    1/4"-28
    1/2"3/8"5/8"0.13"Steel90477A1110000
    5/16"-18
    9/16"7/16"3/4"0.14"Steel90477A0300000
    5/16"-24
    9/16"7/16"3/4"0.14"Steel90477A1120000
    3/8"-16
    11/16"17/32"7/8"0.16"Steel90477A0310000
    3/8"-24
    11/16"17/32"7/8"0.16"Steel90477A1130000
    1/2"-13
    7/8"23/32"1 1/8"0.22"Steel90477A0330000
    1/2"-20
    7/8"23/32"1 1/8"0.22"Steel90477A1140000
    5/8"-11
    1 1/16"29/32"1 3/8"0.25"Steel90477A0350000
    5/8"-18
    1 1/16"29/32"1 3/8"0.25"Steel90477A1150000
    3/4"-10
    1 1/4"1 1/64"1 5/8"0.28"Steel90477A03600000
    3/4"-16
    1 1/4"1 1/64"1 5/8"0.28"Steel90477A11600000
    7/8"-9
    1 7/16"1 1/8"1 3/4"0.44"Steel90477A03700000
    7/8"-14
    1 7/16"1 1/8"1 3/4"0.44"Steel90477A11700000
    1"-8
    1 5/8"1 15/64"2"0.47"Steel90477A03800000
    1"-12
    1 5/8"1 15/64"2"0.47"Steel90477A11800000
    M6 × 1 mm13 mm9.5 mm15.9 mm3.2 mmSteel90477A1190000
    M8 × 1.25 mm14 mm11.1 mm19 mm3.6 mmSteel90477A1210000
    M10 × 1.5 mm17 mm13.5 mm22.2 mm5.6 mmSteel90477A1220000
    M12 × 1.75 mm22 mm18.3 mm28.6 mm5.6 mmSteel90477A1230000
    M16 × 2 mm27 mm23 mm34.9 mm6.4 mmSteel90477A1240000
    M20 × 2.5 mm37 mm28.6 mm44.5 mm11.1 mmSteel90477A12500000
    M24 × 3 mm41 mm31.3 mm50.8 mm11.9 mmSteel90477A12600000
     

    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 mm5.53.780.6ISO Class 8
    JIS B 1190
    10090438A110000000
    M4 × 0.7 mm74.210.50.6ISO Class 8
    JIS B 1190
    10090438A12000000
    M5 × 0.8 mm8511.80.7ISO Class 8
    JIS B 1190
    10090438A13000000
    M6 × 1 mm106140.8ISO Class 8
    JIS B 1190
    10090438A14000000
    M8 × 1 mm12817.51.1ISO Class 8
    JIS B 1190
    1090438A16000000
    M8 × 1.25 mm12817.51.1ISO Class 8
    JIS B 1190
    2590438A15000000
    M10 × 1 mm1410211.2ISO Class 8
    JIS B 1190
    1090438A17000000
    M10 × 1.25 mm1410211.2ISO Class 8
    JIS B 1190
    590438A1800000
    M12 × 1.25 mm1711.5251.4ISO Class 8
    JIS B 1190
    590438A2100000
    M12 × 1.75 mm1711.5251.4ISO Class 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's more durable than clear zinc plating.
    Flange,
    mm
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    JIS
    Specification
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M5 × 0.8 mm8511.80.7ISO Class 10
    JIS B 1190
    5095108A10800000
    M6 × 1 mm106140.8ISO Class 10
    JIS B 1190
    10095108A1040000
    M8 × 1.25 mm12817.51ISO Class 10
    JIS B 1190
    5095108A1050000
    M10 × 1 mm1410211.2ISO Class 10
    JIS B 1190
    195108A1090000
    M10 × 1.25 mm1410211.2ISO Class 10
    JIS B 1190
    1095108A10600000
    M12 × 1.25 mm1711.5251.4ISO Class 10
    JIS B 1190
    2595108A1070000
     
    Black Phosphate-Coated Steel
    M6 × 1 mm106140.8ISO Class 10
    JIS B 1190
    10095108A10100000
    M8 × 1.25 mm12817.51.1ISO Class 10
    JIS B 1190
    10095108A10200000
    M10 × 1.25 mm1410211.2ISO Class 10
    JIS B 1190
    5095108A10300000
     

    Thread-Repairing Flange Nuts

    Clean and reshape damaged threads while fastening parts together. Similar to a die, these nuts cut through rust, residue, and weld spatter as they screw on and off to ensure strong connections and prevent sticking during assembly. They have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. Also known as collar nuts.
    High-Strength Steel
    Image of Product. Bottom orientation. Flange Nuts. Thread-Repairing 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-Flake-Coated Steel—The most durable zinc coating, zinc flake is a multilayer finish that resists wear for long-term rust protection. Similar to zinc yellow-chromate, it won't hold up to harsh chemicals like stainless steel can.
    Flange,
    mm
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Dia.
    Thk.
    Fastener Strength
    Grade/Class
    Each
    Zinc-Flake-Coated Steel
    M6 × 1 mm10614.21.1ISO Class 10
    90456A11000000
    M8 × 1.25 mm13817.91.2ISO Class 10
    90456A1200000
    M10 × 1.5 mm161021.81.5ISO Class 10
    90456A1300000
    M12 × 1.75 mm1812261.8ISO Class 10
    90456A1400000
     
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