Thread Size Thread Size |
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Locking Type Locking Type |
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| Lock Washer | Cotter Pin |
Material Material |
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Finish Finish |
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Height Height |
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Washer Material Washer Material |
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Width Width |
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Thread Spacing Thread Spacing |
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Washer OD Washer OD |
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Thread Pitch Thread Pitch |
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For Cotter Pin Diameter For Cotter Pin Diameter |
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Minimum Slot Depth Minimum Slot Depth |
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Minimum Slot Width Minimum Slot Width |
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Container Features Container Features |
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About Nuts, Materials, and Finishes
More
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.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 7/64" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 5-40 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 6-32 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 5/16" | 5/32" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 5/32" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 13/64" | Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | Steel | 0.578" | 100 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 21/64" | Steel | 0.578" | 100 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 17/32" | Steel | 0.891" | 10 | 000000000 | 0000 |
Black Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 0000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 11/64" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | Steel | 0.5" | 100 | 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 |
Stainless Steel Locknuts with External-Tooth Lock Washer
These stainless steel locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they 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.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||
Standard Hex Nut Profile | |||||||
| 4-40 | 1/4" | 1/8" | 400 Stainless Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 11/64" | 400 Stainless Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 11/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 400 Stainless Steel | 0.871" | 10 | 000000000 | 0000 |
Narrow Hex Nut Profile | |||||||
| 6-32 | 1/4" | 3/32" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 00000 |
Metric Stainless Steel Locknuts
with External-Tooth Lock Washer
These locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they 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.
Black-oxide stainless steel nuts 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. | |
18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | 400 Stainless Steel | 6.5 | 50 | 000000000 | 000000 |
| M4 | 0.7 | 7 | 4.1 | 400 Stainless Steel | 8.2 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | 400 Stainless Steel | 9.5 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 6.2 | 400 Stainless Steel | 11.5 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.5 | 18-8 Stainless Steel | 15.1 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | 18-8 Stainless Steel | 19.2 | 5 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Black-Oxide 400 Stainless Steel | 6.5 | 25 | 000000000 | 0000 |
| M4 | 0.7 | 7 | 4.1 | Black-Oxide 400 Stainless Steel | 8.2 | 25 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Black-Oxide 400 Stainless Steel | 9.5 | 25 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Black-Oxide 400 Stainless Steel | 11.5 | 25 | 000000000 | 00000 |
Low-Strength Steel Locknuts for use with Cotter Pins
Also known as castle nuts, secure these nuts 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. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 1/16" | 0.07" | 0.072" | 50 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 7/32" | 1/16" | 0.07" | 0.072" | 50 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 17/64" | 5/64" | 0.09" | 0.078" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 17/64" | 5/64" | 0.09" | 0.078" | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 21/64" | 7/64" | 0.12" | 0.11" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | 7/64" | 0.12" | 0.11" | 25 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | 3/32" | 0.12" | 0.155" | 25 | 000000000 | 00000 |
| 7/16"-20 | 11/16" | 3/8" | 3/32" | 0.12" | 0.155" | 25 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 7/16" | 1/8" | 0.15" | 0.148" | 25 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | 1/8" | 0.15" | 0.148" | 25 | 000000000 | 0000 |
| 9/16"-12 | 7/8" | 31/64" | 7/64" | 0.15" | 0.163" | 10 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 31/64" | 7/64" | 0.15" | 0.163" | 5 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | 5/32" | 0.18" | 0.219" | 10 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | 5/32" | 0.18" | 0.195" | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 21/32" | 5/32" | 0.18" | 0.265" | 10 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 21/32" | 5/32" | 0.18" | 0.265" | 10 | 000000000 | 00000 |
| 7/8"-9 | 1 5/16" | 3/4" | 5/32" | 0.18" | 0.204" | 5 | 000000000 | 0000 |
| 7/8"-14 | 1 5/16" | 3/4" | 5/32" | 0.18" | 0.204" | 5 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 55/64" | 3/16" | 0.24" | 0.241" | 5 | 000000000 | 00000 |
| 1"-14 | 1 1/2" | 55/64" | 3/16" | 0.24" | 0.241" | 5 | 000000000 | 00000 |
| 1 1/4"-7 | 1 7/8" | 1 3/32" | 9/32" | 0.31" | 0.297" | 1 | 000000000 | 0000 |
| 1 1/4"-12 | 1 7/8" | 1 1/16" | 9/32" | 0.31" | 0.33" | 1 | 000000000 | 0000 |
| 1 1/2"-6 | 2 1/4" | 1 5/16" | 5/16" | 0.37" | 0.457" | 1 | 000000000 | 0000 |
| 1 1/2"-12 | 2 1/4" | 1 5/16" | 5/16" | 0.37" | 0.457" | 1 | 000000000 | 0000 |
| 1 3/4"-5 | 2 5/8" | 1 1/2" | 3/8" | 0.43" | 0.44" | 1 | 000000000 | 00000 |
| 1 3/4"-12 | 2 5/8" | 1 1/2" | 3/8" | 0.43" | 0.44" | 1 | 000000000 | 00000 |
| 2"-4 1/2 | 3" | 1 23/32" | 3/8" | 0.43" | 0.485" | 1 | 000000000 | 00000 |
| 2"-12 | 3" | 1 23/32" | 3/8" | 0.43" | 0.485" | 1 | 000000000 | 00000 |
Medium-Strength Steel Locknuts
for use with Cotter Pins—Grade 5
Also known as castle nuts, secure these nuts 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. They're zinc plated to resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Grade 5 | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 1/16" | 0.07" | 0.072" | 25 | 000000000 | 000000 |
| 5/16"-18 | 1/2" | 17/64" | 5/64" | 0.09" | 0.078" | 25 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 21/64" | 7/64" | 0.12" | 0.11" | 25 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | 7/64" | 0.12" | 0.135" | 25 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 7/64" | 0.15" | 0.137" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | 5/32" | 0.18" | 0.195" | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | 5/32" | 0.18" | 0.217" | 5 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 55/64" | 3/16" | 0.24" | 0.241" | 1 | 000000000 | 0000 |
Stainless Steel Locknuts for use with Cotter Pins
These locknuts have good chemical resistance and may be mildly magnetic. Also known as castle nuts, secure them by inserting a cotter pin or safety wire through the slots in the nut 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.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 10-32 | 3/8" | 1/4" | 3/64" | 0.06" | 0.09" | 5 | 000000000 | 000000 |
| 1/4"-20 | 7/16" | 9/32" | 1/16" | 0.07" | 0.09" | 5 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 9/32" | 1/16" | 0.07" | 0.09" | 5 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 21/64" | 5/64" | 0.09" | 0.09" | 5 | 000000000 | 00000 |
| 5/16"-24 | 1/2" | 21/64" | 5/64" | 0.09" | 0.09" | 5 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 13/32" | 3/32" | 0.12" | 0.13" | 1 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 13/32" | 3/32" | 0.12" | 0.13" | 1 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 9/16" | 1/8" | 0.15" | 0.15" | 1 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 9/16" | 1/8" | 0.15" | 0.15" | 1 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 23/32" | 5/32" | 0.18" | 0.21" | 1 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 23/32" | 5/32" | 0.18" | 0.21" | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 13/16" | 5/32" | 0.18" | 0.25" | 1 | 000000000 | 00000 |
| 3/4"-16 | 1 1/8" | 13/16" | 5/32" | 0.18" | 0.25" | 1 | 000000000 | 00000 |
| 7/8"-9 | 1 5/16" | 29/32" | 5/32" | 0.18" | 0.25" | 1 | 000000000 | 00000 |
| 1"-8 | 1 1/2" | 1" | 3/16" | 0.24" | 0.28" | 1 | 000000000 | 00000 |
| 1 1/4"-7 | 1 7/8" | 1 1/4" | 7/32" | 0.31" | 0.37" | 1 | 000000000 | 00000 |
| 1 1/2"-6 | 2 1/4" | 1 1/2" | 1/4" | 0.37" | 0.43" | 1 | 000000000 | 00000 |
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 |
Assortments of Locknuts with External-Tooth Lock Washer
Teeth bite into surfaces for easy installation and mild vibration resistance.
Zinc-plated steel nuts are corrosion resistant in wet environments.
18-8 stainless steel nuts are chemical resistant and may be mildly magnetic.