Thread Pitch Thread Pitch |
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Locking Type Locking Type |
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| Nylon Insert | Serrations |
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| Lock Washer | Cotter Pin |
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| Distorted Thread | Steel Insert |
Height Height |
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Thread Spacing Thread Spacing |
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Specifications Met Specifications Met |
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Width Width |
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Flange Diameter Flange Diameter |
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Flange Thickness Flange Thickness |
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Washer Type Washer Type |
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About Nuts, Materials, and Finishes
More
Metric Medium-Strength Steel
Nylon-Insert Locknuts—Class 8
Made from medium-strength steel with a nylon insert, these Class 8 metric locknuts are strong enough to use on most machinery and equipment that’s prone to vibration and temperature changes. The nylon insert also won’t damage the threads on your bolt. All are reusable, but their holding power lessens with each use. Pair them with compatible Class 8.8 metric bolts.
These locknuts meet the dimensional and material standards of DIN and ISO that make sure they're compatible with other parts and tools. Although DIN 982 and 985 are no longer active standards, they’re still a common reference point for designers. With only slight differences in tolerance, the ISO 7041-2 standard has replaced the inactive DIN 982 standard. The ISO 7040 standard is similar to the inactive DIN 985 standard, except the overall height is a little taller.
Zinc-plated steel locknuts are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
Black ultra-corrosion-resistant coated steel locknuts are more corrosion resistant in wet environments than zinc-plated steel locknuts. They're also known as black luster locknuts.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M2.5 | 0.45 | 5 | 3.8 | 220° | DIN 985, ISO 7040 | 50 | 000000000 | 000000 |
| M3 | 0.5 | 5.5 | 4 | 220° | DIN 985, ISO 7040 | 100 | 000000000 | 0000 |
| M4 | 0.7 | 7 | 5 | 220° | DIN 985, ISO 7040 | 100 | 000000000 | 0000 |
| M4 | 0.7 | 7 | 5.3 | 220° | DIN 982, ISO 7041-2 | 100 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 5 | 220° | DIN 985, ISO 7040 | 100 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 6.3 | 220° | DIN 982, ISO 7041-2 | 100 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | 220° | DIN 985, ISO 7040 | 100 | 000000000 | 0000 |
| M6 | 1 | 10 | 8 | 220° | DIN 982, ISO 7041-2 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8 | 220° | DIN 985, ISO 7040 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 9.5 | 220° | DIN 982, ISO 7041-2 | 50 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 220° | DIN 985, ISO 7040 | 50 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 11.5 | 220° | DIN 982, ISO 7041-2 | 25 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 12 | 220° | DIN 985, ISO 7040 | 50 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 14 | 220° | DIN 982, ISO 7041-2 | 25 | 000000000 | 00000 |
| M14 | 2 | 22 | 14 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M14 | 2 | 22 | 16 | 220° | DIN 982, ISO 7041-2 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M16 | 2 | 24 | 18 | 220° | DIN 982, ISO 7041-2 | 10 | 000000000 | 00000 |
| M18 | 2.5 | 27 | 18.5 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 00000 |
| M18 | 2.5 | 27 | 20 | 220° | DIN 982, ISO 7041-2 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 20 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 22 | 220° | DIN 982, ISO 7041-2 | 1 | 000000000 | 0000 |
| M22 | 2.5 | 32 | 22 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M22 | 2.5 | 32 | 25 | 220° | DIN 982, ISO 7041-2 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 00000 |
| M24 | 3 | 36 | 28 | 220° | DIN 982, ISO 7041-2 | 1 | 000000000 | 0000 |
| M27 | 3 | 41 | 27 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 30 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M33 | 3.5 | 50 | 33 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M36 | 4 | 55 | 36 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M39 | 4 | 60 | 39 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M48 | 5 | 75 | 48 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
Black Ultra-Corrosion-Resistant Coated Steel—Class 8 | ||||||||
| M4 | 0.7 | 7 | 5 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 5 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
Metric Fine-Thread Medium-Strength
Steel Nylon-Insert Locknuts—Class 8
Get a grip on metric bolts exposed to vibration, wear, and changes in temperature. These metric locknuts have a nylon insert that holds onto bolts without damaging their threads. They have fine-pitch threads, which are closer together than coarse-pitch threads and less likely to loosen from vibration. Fine threads and coarse threads are not compatible. These locknuts are reusable but lose holding power with each use.
Made of Class 8 steel, these nuts are strong enough for use with most machinery and equipment. A zinc plating prevents rust in wet and damp areas. Combine them with Class 8.8 metric bolts, which are comparable in strength.
These locknuts meet the dimensional and material standards of DIN and ISO that make sure they're compatible with other parts and tools. Although DIN 982 and 985 are no longer active standards, they’re still a common reference point for designers. With only slight differences in tolerance, ISO 7041-2 and 7040 have replaced the inactive DIN standards.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M8 | 1 | 13 | 8 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M10 | 1.25 | 17 | 10 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M10 | 1 | 17 | 10 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M12 | 1.5 | 19 | 12 | 220° | DIN 985, ISO 7040 | 20 | 000000000 | 00000 |
| M12 | 1.25 | 19 | 12 | 220° | DIN 985, ISO 7040 | 25 | 000000000 | 00000 |
| M12 | 1 | 19 | 12 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 14 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 16 | 220° | DIN 982, ISO 7041-2 | 10 | 000000000 | 00000 |
| M16 | 1.5 | 24 | 16 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 18 | 220° | DIN 982, ISO 7041-2 | 5 | 000000000 | 0000 |
| M18 | 1.5 | 27 | 18.5 | 220° | DIN 985, ISO 7040 | 10 | 000000000 | 00000 |
| M20 | 2 | 30 | 20 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M20 | 1.5 | 30 | 20 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M20 | 1.5 | 30 | 22 | 220° | DIN 982, ISO 7041-2 | 1 | 000000000 | 0000 |
| M22 | 1.5 | 32 | 22 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 00000 |
| M24 | 2 | 36 | 24 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M24 | 1.5 | 36 | 24 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M27 | 2 | 41 | 27 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M27 | 1.5 | 41 | 27 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M30 | 2 | 46 | 30 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M33 | 2 | 50 | 33 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M36 | 3 | 55 | 36 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M39 | 3 | 60 | 39 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M42 | 3 | 65 | 42 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M45 | 3 | 70 | 45 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
| M48 | 3 | 75 | 48 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 00000 |
Metric Steel Locknuts with External-Tooth Lock Washer
Also known as Keps and K-lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Steel | 7.1 | 100 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 0000 |
Black Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3 | Steel | 7.1 | 100 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 50 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 00000 |
Metric Steel Nonmarring Locknuts with Spring-Lock Washer
A conical washer acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. They have a smooth rim to resist scratching materials when tightened. Also known as Keps and K-lock nuts. Height includes the thickness of the washer.
Zinc-plated locknuts have an outer layer of zinc that provides corrosion resistance in wet environments.
Black oxide locknuts are mildly corrosion resistant and have a dark surface color.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.8 | Steel | 8 | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 100 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.8 | Steel | 18 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 10.7 | Steel | 22 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 13.8 | Steel | 25.5 | 25 | 000000000 | 00000 |
Black-Oxide Steel—Class 8 | ||||||||
| M3 | 0.5 | 6 | 3.5 | Steel | 10 | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 50 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 25 | 000000000 | 0000 |
Metric Medium-Strength Steel Locknuts
for use with Cotter Pins—Class 8
Often referred to as castle nuts, secure these by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Height includes the slots. Cotter pins are not included.
Zinc-plated steel locknuts resist corrosion in wet environments.
Steel locknuts are best for dry environments, since moisture will cause them to rust. They are weldable and can be painted or finished.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | For Cotter Pin Dia., mm | Min. Slot Wd., mm | Min. Slot Dp., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||||
| M6 | 1 | 10 | 7.5 | 1.6 | 2 | 2.5 | DIN 935 | 5 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 9.5 | 2 | 2.5 | 3 | DIN 935 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 12 | 2.5 | 2.8 | 4 | DIN 935 | 5 | 000000000 | 0000 |
| M12 | 1.5 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 5 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 5 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 5 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 21 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 22 | 4 | 4.5 | 6 | DIN 935 | 5 | 000000000 | 00000 |
| M24 | 2 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M27 | 3 | 41 | 30 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 00000 |
| M30 | 3.5 | 46 | 33 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
Steel—Class 8 | ||||||||||
| M12 | 1.5 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 10 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 2 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 21 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 22 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 33 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 0000 |
| M36 | 3 | 55 | 38 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
| M36 | 4 | 55 | 38 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
| M42 | 4.5 | 65 | 46 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
| M48 | 5 | 75 | 50 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
| M56 | 5.5 | 85 | 57 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
Metric Medium-Strength Steel Top-Lock
Distorted-Thread Locknuts—Class 8
An irregularly shaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. Comparable in strength to Class 8.8 bolts, they're suitable for fastening most machinery and equipment. A zinc-plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | |||||||
| M3 | 0.5 | 5.5 | 3.7 | DIN 980V | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | DIN 980V | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.1 | DIN 980V | 100 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | DIN 980V | 100 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | DIN 980V | 50 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | DIN 980V | 25 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 12 | DIN 980V | 25 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | DIN 980V | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | DIN 980V | 10 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 18 | DIN 980V | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 20 | DIN 980V | 5 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | DIN 980V | 1 | 000000000 | 0000 |
Metric Steel-Insert Locknuts for Extreme Vibration—Class 8
The steel insert grips the threads and lifts away from the nut body when installed, isolating the insert from the nut’s load to resist spinoff caused by vibration. These locknuts are often used in shakers and vibrating equipment. The strength of the bolt should match the strength of the nut to prevent damaging threads. Comparable in strength to Class 8.8 bolts, they're suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
Metric Medium-Strength Steel
Serrated Flange Locknuts—Class 8
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 | |||||||||
| M5 | 0.8 | 8 | 4.3 | 11.2 | 1.75 | __ | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 5.5 | 14.25 | 2.2 | __ | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 7 | 18.25 | 2.6 | __ | 25 | 000000000 | 00000 |
| M10 | 1.5 | 15 | 7.9 | 21 | 2.8 | __ | 10 | 000000000 | 0000 |
| M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923, ISO 4161 | 25 | 000000000 | 0000 |
Metric Medium-Strength Steel
Nylon-Insert Flange Locknuts—Class 8
A nylon insert firmly grips threads to resist loosening and a flange distributes the load over a large area. These nuts are reusable, but their holding power lessens with each use. Suitable for fastening most machinery and equipment, they're comparable in strength to Class 8.8 bolts. Height includes the flange.
Zinc-plated steel locknuts are corrosion resistant in wet environments.
Black ultra-corrosion-resistant coated steel nuts are more corrosion resistant in wet environments than zinc-plated steel nuts. They're also known as black luster nuts.
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 | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||||
| M5 | 0.8 | 8 | 7.1 | 11.8 | 1 | 250° | DIN 6926 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 9.1 | 14.2 | 1.1 | 250° | DIN 6926 | 100 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 11.1 | 17.9 | 1.2 | 250° | DIN 6926 | 100 | 000000000 | 0000 |
| M10 | 1.5 | 15 | 13.5 | 21.8 | 1.5 | 250° | DIN 6926 | 50 | 000000000 | 0000 |
| M12 | 1.75 | 18 | 16.1 | 26 | 1.8 | 250° | DIN 6926 | 25 | 000000000 | 0000 |
| M14 | 2 | 21 | 18.8 | 29.9 | 2.1 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M16 | 2 | 24 | 20.3 | 34.5 | 2.4 | 250° | DIN 6926 | 10 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 24.8 | 42.8 | 3 | 250° | DIN 6926 | 1 | 000000000 | 0000 |
Black Ultra-Corrosion-Resistant Coated Steel—Class 8 | ||||||||||
| M5 | 0.8 | 8 | 7.1 | 11.8 | 1 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M6 | 1 | 10 | 9.1 | 14.2 | 1.1 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 11.1 | 17.9 | 1.2 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M12 | 1.75 | 18 | 16.1 | 26 | 1.8 | 250° | DIN 6926 | 5 | 000000000 | 0000 |