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Strong enough for use in most machinery and equipment, these medium-strength metric nuts have serrations on the underside of the flange. The serrations prevent the nuts from loosening in applications with mild vibration.
Also known as collar nuts, they do not require a washer, which saves assembly time. Instead, the flange spreads the holding force across a wide area. Because the flange makes them wider than standard nuts, they may not fit into tight spots.
Zinc-plated steel nuts have a layer of zinc on the outside that prevents the steel from rusting in wet environments, extending the life of the nut.
To ensure compatibility with other parts and tools, some nuts meet ISO 4161 (formerly DIN 6923).
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | |||||||||
M4 | 0.7 | 7 | 4 | 10 | 0.9 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M10 | 1.25 | 15 | 10 | 21.8 | 1.5 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923, ISO 4161 | 10 | 000000000 | 00000 |
M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 6923, ISO 4161 | 1 | 000000000 | 0000 |
Steel—Class 8 | |||||||||
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
Serrations grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're about 25% stronger than medium-strength steel flange locknuts and comparable in strength to Class 10.9 bolts. Height includes the flange.
Zinc-plated steel flange locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | |||||||||
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923 | 50 | 000000000 | 00000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923 | 50 | 000000000 | 00000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923 | 25 | 000000000 | 00000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923 | 10 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923 | 5 | 000000000 | 00000 |
Steel—Class 10 | |||||||||
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923 | 50 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923 | 50 | 000000000 | 00000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923 | 25 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923 | 10 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923 | 5 | 000000000 | 00000 |
These flange locknuts have good chemical resistance and may be mildly magnetic. They have serrations that grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. Height includes the flange. Metric 18-8 stainless steel is also known as A2 stainless steel.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
M3 | 0.5 | 5.5 | 4 | 8 | 0.7 | DIN 6923 | 100 | 000000000 | 00000 |
M4 | 0.7 | 7 | 4.65 | 10 | 1 | DIN 6923 | 100 | 000000000 | 0000 |
M5 | 0.8 | 8 | 5 | 11 | 1 | DIN 6923 | 100 | 000000000 | 00000 |
M6 | 1 | 10 | 6 | 14.2 | 1.18 | DIN 6923 | 50 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.3 | DIN 6923 | 25 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.8 | DIN 6923 | 25 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 2.19 | DIN 6923 | 10 | 000000000 | 0000 |
Made from 316 stainless steel, these flange locknuts have excellent resistance to chemicals and salt water. They have serrations that grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. Height includes the flange. Metric 316 stainless steel is also known as A4 stainless steel. Nuts may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||||||
M3 | 0.5 | 5.5 | 4 | 8 | 0.7 | DIN 6923 | 25 | 000000000 | 00000 |
M4 | 0.7 | 7 | 4.65 | 10 | 1 | DIN 6923 | 25 | 000000000 | 0000 |
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923 | 25 | 000000000 | 0000 |
M6 | 1 | 10 | 6 | 14.2 | 1.18 | DIN 6923 | 25 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.3 | DIN 6923 | 10 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.8 | DIN 6923 | 10 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 2.19 | DIN 6923 | 5 | 000000000 | 00000 |
Also known as collar nuts, these metric nuts have a flange that distributes pressure across the surface, so you don't need a washer. Because of the flange, they may not fit in tight spaces. Made of high-strength Class 10 steel, they’re about 25% stronger than medium-strength steel flange nuts. Their strength is comparable to Class 10.9 bolts.
When choosing your finish, consider your environment. Steel nuts without any finish should be used in dry environments. Zinc-plated nuts have a layer of zinc that protects the steel under it from rust, extending the life of the nut. A black-phosphate finish shields nuts from rusting, even in the midst of oil and grease.
ISO 4161 (formerly DIN 6923) and DIN 6331 nuts meet international standards for flange nut dimensions and materials.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Standard Profile | |||||||||
Steel—Class 10 | |||||||||
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923, ISO 4161 | 50 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M14 | 2 | 21 | 14 | 29.9 | 2.1 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 6923, ISO 4161 | 5 | 000000000 | 0000 |
Zinc-Plated Steel—Class 10 | |||||||||
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923, ISO 4161 | 25 | 000000000 | 00000 |
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M14 | 1.5 | 21 | 14 | 29.9 | 2.1 | DIN 6923, ISO 4161 | 10 | 000000000 | 00000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 6923, ISO 4161 | 1 | 000000000 | 0000 |
M24 | 3 | 36 | 24 | 51 | 3.6 | DIN 6923, ISO 4161 | 1 | 000000000 | 00000 |
Black-Phosphate Steel—Class 10 | |||||||||
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
No need for a washer—these metric medium-strength steel nuts have a flange that distributes pressure across its surface the way a washer does. Skipping the washer saves assembly time. Sometimes called collar nuts, the flange gives these nuts a wider profile than standard nuts, so they may not fit in tight spaces. Made of medium-strength, Class 8 steel, they’re suitable for fastening most machinery and equipment. A zinc plating protects the steel under it from rust, extending the life of the screw.
These flange nuts meet ISO 4161 and DIN 6923 dimensional standards, which confirm their compatibility with other parts and tools. The two standards are functionally equivalent. Even though the DIN spec has been replaced by the ISO spec, it remains a common reference for designers and makers.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | |||||||||
M4 | 0.7 | 7 | 4.65 | 10 | 1.65 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M5 | 0.8 | 8 | 5 | 11.8 | 2.8 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M6 | 1 | 10 | 6 | 14.2 | 2.9 | DIN 6923, ISO 4161 | 100 | 000000000 | 0000 |
M8 | 1 | 13 | 8 | 17.9 | 3.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M8 | 1.25 | 13 | 8 | 17.9 | 3.5 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M10 | 1.25 | 15 | 10 | 21.8 | 4.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M10 | 1.5 | 15 | 10 | 21.8 | 4.5 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M12 | 1.25 | 18 | 12 | 26 | 5.3 | DIN 6923, ISO 4161 | 25 | 000000000 | 00000 |
M12 | 1.5 | 18 | 12 | 26 | 5.3 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 5.3 | DIN 6923, ISO 4161 | 25 | 000000000 | 00000 |
M14 | 2 | 21 | 14 | 29.9 | 6.2 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M16 | 1.5 | 24 | 16 | 34.5 | 7 | DIN 6923, ISO 4161 | 1 | 000000000 | 0000 |
M16 | 2 | 24 | 16 | 34.5 | 7 | DIN 6923, ISO 4161 | 10 | 000000000 | 00000 |
M20 | 2.5 | 30 | 20 | 42.8 | 9 | DIN 6923, ISO 4161 | 5 | 000000000 | 00000 |
Skip the washer—these metric stainless steel nuts have a flange that does the same job, spreading pressure across its surface for a strong hold. They're also called collar nuts. By leaving out the washer, they save assembly time, which adds up on parts that have multiple bolts. On the other hand, they may not fit into tight spots since they have a wider profile than standard nuts. All are 18-8 stainless steel, which is nearly as strong as steel and stands up to outdoor, washdown, and other corrosive environments without rusting.
These flange nuts meet DIN 6923 and ISO 4161 dimensional standards, which confirm their compatibility with other parts and tools. The two standards are functionally equivalent. Although DIN 6923 is no longer active, it's still a common reference for designers and makers.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
M3 | 0.5 | 5 | 4 | 8 | 1 | DIN 6923, ISO 4161 | 100 | 000000000 | 00000 |
M4 | 0.7 | 7 | 4 | 10 | 0.9 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923, ISO 4161 | 50 | 000000000 | 00000 |
M6 | 1 | 10 | 6 | 14.2 | 1.19 | DIN 6923, ISO 4161 | 50 | 000000000 | 0000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.31 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.81 | DIN 6923, ISO 4161 | 10 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 2.2 | DIN 6923, ISO 4161 | 10 | 000000000 | 00000 |
These flange nuts have excellent resistance to chemicals and can be used in saltwater environments. A flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They may be mildly magnetic. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||||||
M3 | 0.5 | 5.5 | 4 | 8 | 0.7 | DIN 6923 | 100 | 000000000 | 00000 |
M4 | 0.7 | 7 | 4 | 10 | 0.9 | DIN 6923 | 100 | 000000000 | 00000 |
M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923 | 100 | 000000000 | 00000 |
M6 | 1 | 10 | 6 | 14.2 | 1.19 | DIN 6923 | 50 | 000000000 | 00000 |
M8 | 1.25 | 13 | 8 | 17.9 | 1.31 | DIN 6923 | 10 | 000000000 | 0000 |
M10 | 1.5 | 15 | 10 | 21.8 | 1.81 | DIN 6923 | 10 | 000000000 | 0000 |
M12 | 1.75 | 18 | 12 | 26 | 2.2 | DIN 6923 | 5 | 000000000 | 0000 |