Anti Vibration Resistant Washers
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The Schnorr safety washers are in the form of a disc spring which is serrated on both sides and of trapezoidal cross section. Schnorr washers are engineered to match screw dimensions precisely. The outer diameter of the washer is matched to the head diameter of pan-head and hexagon socket head cap screws.
As a result, the Schnorr serrated safety washer can be used with practically any screw and bolt type, including those with recessed heads. The only exception is countersunk screws.
The ingenious form of the Schnorr serrated safety washer combines the advantages of security through friction and mechanical locking. This unique design ensures that Schnorr washers provide exceptional performance even under the most demanding conditions.
They offer the following advantages:
Schnorr washers are available in two versions to cater to different needs:
Schnorr washers are essential components in ensuring the reliability and longevity of bolted joints. They provide exceptional resistance to vibrational loosening, making them ideal for a wide range of industrial applications. From automotive to aerospace, Schnorr safety washers are trusted for their ability to maintain high tension and prevent bolt slippage.
With their robust design and versatility, Schnorr washers are a trusted choice for engineers and manufacturers worldwide. Whether you are dealing with heavy machinery, construction, or precision instruments, these washers offer the reliability and peace of mind you need. Explore our extensive range of Schnorr safety washers and enhance the performance and durability of your assemblies today.
The original Schnorr safety washer type ‘S’ is suitable for normal requirements and available for bolts sizes from M1.6 to M36 in grades up to 8.8.
Please contact us should you require an item with different dimensions, material or surface treatment.
| Article no: | Applies to the normal version made of spring steel, hardened, blackened; mechanically galvanised maximum dimension as delivered |
| h max: | Maximum dimension as delivered |
| h min: | Minimum dimension after load test |
| Available material grades: | Spring steel according to DIN EN 10132-4; corrosion-resistant steel 1.4301; Phosphorus Bronze CuSn8; nickel cobalt alloy; creep-resistant steel 1.4122 Inconel |
| Surface treatments: | Blackened (standard), bronzed, phosphated, galvanized, zinc lamellar coatings |
| Article No/ Order Ref. | Finish | Size | Ordering Information | Packaging | ||||||
| Normal Size | d1 | d2 | s | hmin | hmax | Unit | Weight per 1000 pcs | |||
| mm | inch | mm | mm | mm | mm | mm | pcs. | kg | ||
| 402300 450000 | Blackened Gal.Zn8 + passivation | 1.6 | 1.7 | 3.2 | 0.35 | 0.40 | 0.60 | 2000 | 0.013 | |
| 404400 450100 | Blackened Gal.Zn8 + passivation | 2.0 | 2.2 | 4.0 | 0.35 | 0.40 | 0.60 | 2000 | 0.021 | |
| 406800 450200 | Blackened Gal.Zn8 + passivation | 2.5 | 2.7 | 4.8 | 0.45 | 0.50 | 0.90 | 2000 | 0.039 | |
| 409400 450300 | Blackened Gal.Zn8 + passivation | 3.0 | 1/8 | 3.2 | 5.5 | 0.45 | 0.50 | 0.9 | 2000 | 0.049 |
| 411200 450400 | Blackened Gal.Zn8 + passivation | 3.5 | 3.7 | 6.0 | 0.45 | 0.55 | 0.9 | 2000 | 0.055 | |
| 412700 450500 | Blackened Zn8M + passivation | 4.0 | 5/32 | 4.3 | 7.0 | 0.50 | 0.55 | 1.0 | 1000 | 0.085 |
| 414500 450600 | Blackened Zn8M + passivation | 5.0 | 3/16 | 5.3 | 9.0 | 0.60 | 0.60 | 1.1 | 1000 | 0.167 |
| 416300 450700 | Blackened Zn8M + passivation | 6.0 | 6.4 | 10.0 | 0.60 | 0.70 | 1.2 | 1000 | 0.200 | |
| 418100 450800 | Blackened Zn8M + passivation | 6.35 | 1/4 | 6.7 | 9.5 | 0.60 | 0.65 | 1.2 | 1000 | 0.150 |
| 419 200 450 900 | Blackened Zn8M + passivation | 7.0 | 7.4 | 12.0 | 0.70 | 0.80 | 1.3 | 1000 | 0.355 | |
| 420400 451000 | Blackened Zn8M + passivation | 8.0 | 5/16 | 8.4 | 13.0 | 0.70 | 0.90 | 1.4 | 1000 | 0.392 |
| 423000 451100 | Blackened Zn8M + passivation | 10.0 | 3/8 | 10.5 | 16.0 | 0.90 | 1.10 | 1.6 | 1000 | 0.750 |
| 425100 451200 | Blackened Zn8M + passivation | 11.1 | 7/16 | 11.6 | 15.9 | 0.90 | 1.05 | 1.6 | 500 | 0.595 |
| 426200 451300 | Blackened Zn8M + passivation | 12.0 | 13.0 | 18.0 | 1.00 | 1.15 | 1.7 | 500 | 0.879 | |
| 427900 451400 | Blackened Zn8M + passivation | 12.7 | 1/2 | 13.7 | 19.0 | 1.00 | 1.25 | 1.8 | 500 | 0.976 |
| 429100 451500 | Blackened Zn8M + passivation | 14.0 | 15.0 | 22.0 | 1.10 | 1.35 | 2.0 | 500 | 1.641 | |
| 430700 451600 | Blackened Zn8M + passivation | 16.0 | 5/8 | 17.0 | 24.0 | 1.30 | 1.55 | 2.1 | 500 | 1.984 |
| 432400 451700 | Blackened Zn8M + passivation | 18.0 | 19.0 | 27.0 | 1.40 | 1.75 | 2.3 | 250 | 2.970 | |
| 433800 451800 | Blackened Zn8M + passivation | 19.0 | 3/4 | 20.0 | 30.0 | 1.40 | 1.90 | 2.5 | 250 | 4.100 |
| 435100 451900 | Blackened Zn8M + passivation | 20.0 | 21.0 | 30.0 | 1.40 | 1.85 | 2.5 | 250 | 3.742 | |
| 436600 452000 | Blackened Zn8M + passivation | 22.0 | 7/8 | 23.0 | 33.0 | 1.40 | 1.95 | 2.7 | 100 | 4.507 |
| 437900 452100 | Blackened Zn8M + passivation | 24.0 | 25.6 | 36.0 | 1.60 | 2.15 | 2.9 | 100 | 5.910 | |
| 439200 452200 | Blackened Zn8M + passivation | 25.4 | 1 | 27.0 | 38.0 | 1.80 | 2.35 | 3.1 | 100 | 7.449 |
| 440300 452300 | Blackened Zn8M + passivation | 27.0 | 28.6 | 39.0 | 1.80 | 2.35 | 3.1 | 100 | 7.369 | |
| 441500 452400 | Blackened Zn8M + passivation | 30.0 | 1 1/8 | 31.6 | 45.0 | 1.80 | 2.60 | 3.6 | 100 | 10.780 |
| 442730 452500 | Blackened Zn8M + passivation | 36.0 | 1 3/8 | 38.0 | 54.0 | 2.50 | 3.20 | 4.2 | 50 | 21.280 |
The original Schnorr safety washer type ‘S’ is suitable for normal requirements and available for bolts sizes from M1.6 to M36 in grades up to 8.8.
| Article no: | Applies to the normal version made of spring steel, hardened, blackened; mechanically galvanised maximum dimension as delivered |
| h max: | Maximum dimension as delivered |
| h min: | Minimum dimension after load test |
| Available material grades: | Spring steel according to DIN EN 10132-4; corrosion-resistant steel 1.4301; Phosphorus Bronze CuSn8; nickel cobalt alloy; creep-resistant steel 1.4122 Inconel |
| Surface treatments: | Blackened (standard), bronzed, phosphated, galvanized, zinc lamellar coatings |
| Article No/ Order Ref. | Size | Ordering Information | Packaging | ||||||
| Normal Size | d1 | d2 | s | hmin | hmax | Unit | Weight per 1000 pcs | ||
| mm | inch | mm | mm | mm | mm | mm | pcs. | kg | |
| 403221 | 1.60 | 1.7 | 3.2 | 0.5 | 0.55 | 0.75 | 1000 | 0.019 | |
| 405420 | 2.00 | 2.2 | 4.0 | 0.5 | 0.55 | 0.75 | 2000 | 0.029 | |
| 407660 | 2.50 | 2.7 | 4.8 | 0.5 | 0.55 | 0.95 | 2000 | 0.042 | |
| 410750 | 3.00 | 1/8 | 3.2 | 5.5 | 0.5 | 0.55 | 0.95 | 2000 | 0.042 |
| 412500 | 3.50 | 3.7 | 6.0 | 0.7 | 0.75 | 1.15 | 2000 | 0.084 | |
| 414200 | 4.00 | 5/32 | 4.3 | 7.0 | 0.7 | 0.75 | 1.20 | 1000 | 0.081 |
| 416100 | 5.00 | 3/16 | 5.3 | 9.0 | 0.7 | 0.75 | 1.20 | 1000 | 0.209 |
| 417900 | 6.00 | 6.4 | 10.0 | 0.7 | 0.75 | 1.20 | 1000 | 0.193 | |
| 418104 | 6.35 | 1/4 | 6.7 | 9.5 | 0.7 | 0.75 | 1.20 | 1000 | 0.172 |
| 422700 | 8.00 | 5/16 | 8.4 | 13.0 | 1.0 | 1.20 | 1.60 | 1000 | 0.557 |
| 424900 | 10.00 | 3/8 | 10.5 | 16.0 | 1.0 | 1.10 | 1.60 | 1000 | 0.731 |
| 425110 | 11.10 | 7/16 | 11.6 | 15.9 | 1.3 | 1.30 | 1.85 | 500 | 0.825 |
| 427600 | 12.00 | 13.0 | 18.0 | 1.3 | 1.30 | 1.85 | 500 | 1.099 | |
| 428950 | 12.70 | 1/2 | 13.7 | 19.0 | 1.3 | 1.40 | 1.95 | 500 | 1.222 |
| 430500 | 14.00 | 15.0 | 22.0 | 1.5 | 1.65 | 2.30 | 500 | 2.244 | |
| 432200 | 16.00 | 5/8 | 17.0 | 24.0 | 1.5 | 1.75 | 2.30 | 500 | 2.487 |
| 433650 | 18.00 | 19.0 | 27.0 | 1.8 | 2.05 | 2.60 | 250 | 3.843 | |
| 433821 | 19.00 | 3/4 | 20.0 | 30.0 | 1.8 | 2.20 | 2.60 | 250 | 5.294 |
| 436400 | 20.00 | 21.0 | 30.0 | 1.8 | 2.15 | 2.80 | 250 | 3.923 | |
| 437810 | 22.00 | 7/8 | 23.0 | 33.0 | 1.8 | 2.30 | 3.00 | 100 | 5.893 |
| 439091 | 24.00 | 25.6 | 36.0 | 2.0 | 2.35 | 3.10 | 100 | 7.508 | |
| 439170 | 25.40 | 1 | 27.0 | 37.0 | 2.5 | 2.85 | 3.60 | 100 | 10.508 |
| 441410 | 27.00 | 28.6 | 39.0 | 2.5 | 2.85 | 3.60 | 100 | 10.300 | |
| 442711 | 30.00 | 1 1/8 | 31.6 | 45.0 | 2.5 | 3.10 | 4.10 | 100 | 15.185 |
| 442790 | 36.00 | 1 3/8 | 38.0 | 54.0 | 3.0 | 3.70 | 4.70 | 100 | 26.218 |
The Schnorr safety washer ‘VS’ can be used with high-strength bolts of the grade 8.8-10.9 without any restrictions.
| Article no: | Applies to the normal version made of spring steel, hardened, blackened; mechanically galvanized maximum dimension as delivered |
| h max: | Maximum dimension as delivered |
| h min: | Minimum dimension after load test |
| Available material grades: | Spring steel according to DIN EN 10132-4; corrosion-resistant steel 1.4301; Phosphorus Bronze CuSn8; nickel cobalt alloy; creep-resistant steel 1.4122 Inconel |
| Surface treatments: | Blackened (standard), bronzed, phosphated, galvanized, zinc lamellar coatings |
| Article No / Order Ref. | Finish | Size | Ordering Information | Packaging | ||||||
| Normal Size | d1 | d2 | s | hmin | hmax | Unit | Weight per 1000 pcs | |||
| mm | inch | mm | mm | mm | mm | mm | pcs. | kg | ||
| 414600 450650 | Blackened Zn8M+passivation | 5 | 3/16 | 5.3 | 9.0 | 0.9 | 0.95 | 1.3 | 1000 | 0.273 |
| 416400 450750 | Blackened Zn8M+passivation | 6 | 6.4 | 10.0 | 0.9 | 0.95 | 1.4 | 1000 | 0.300 | |
| 420500 451050 | Blackened Zn8M+passivation | 8 | 5/16 | 8.4 | 13.0 | 1.1 | 1.15 | 1.7 | 1000 | 0.615 |
| 423100 451150 | Blackened Zn8M+passivation | 10 | 3/8 | 10.5 | 16.0 | 1.4 | 1.50 | 2.0 | 1000 | 1.167 |
| 426300 451350 | Blackened Zn8M+ passivation | 12 | 13.0 | 18.0 | 1.4 | 1.55 | 2.1 | 500 | 1.223 | |
| 429200 451550 | Blackened Zn8M+passivation | 14 | 15.0 | 22.0 | 1.4 | 1.65 | 2.2 | 500 | 2.089 | |
| 430800 451650 | Blackened Zn8M+passivation | 16 | 5/8 | 17.0 | 24.0 | 1.9 | 2.05 | 2.6 | 250 | 3.142 |
| 432500 451750 | Blackened Zn8M+passivation | 18 | 19.0 | 27.0 | 1.9 | 2.15 | 2.7 | 250 | 4.041 | |
| 435300 451950 | Blackened Zn8M+passivation | 20 | 21.0 | 30.0 | 1.9 | 2.10 | 2.8 | 250 | 5.066 | |
| 436700 452050 | Blackened Zn8M+passivation | 22 | 7/8 | 23.0 | 33.0 | 1.9 | 2.30 | 3.0 | 100 | 6.117 |
| 438000 452150 | Blackened Zn8M+passivation | 24 | 25.6 | 36.0 | 2.4 | 2.70 | 3.4 | 100 | 8.865 | |
| 400974 401260 | Blackened Zn8M+passivation | 25.4 | 1 | 38.0 | 27.0 | 2.5 | 2.95 | 3.4 | 100 | 10.580 |
| 440400 452350 | Blackened Zn8M+passivation | 27 | 28.6 | 39.0 | 2.4 | 2.80 | 3.5 | 100 | 9.731 | |
| 441600 452450 | Blackened Zn8M+passivation | 30 | 11/8 | 31.6 | 45.0 | 2.4 | 3.05 | 3.8 | 100 | 14.380 |
| 442801 401051 | Blackened Zn8M+passivation | 36 | 13/8 | 38.0 | 54.0 | 3.0 | 3.75 | 4.5 | 50 | 27.226 |
| Article no: | Applies to the normal version made of spring steel, hardened, blackened; mechanically galvanized maximum dimension as delivered |
| h max: | Maximum dimension as delivered |
| h min: | Minimum dimension after load test |
| Available material grades: | Spring steel according to DIN EN 10132-4; corrosion-resistant steel 1.4301; Phosphorus Bronze CuSn8; nickel cobalt alloy; creep-resistant steel 1.4122 Inconel |
| Surface treatments: | Blackened (standard), bronzed, phosphated, galvanized, zinc lamellar coatings |
| Article No/ Order Ref. | Size | Ordering Information | Packaging | ||||||
| Normal Size | d1 | d2 | s | hmin | hmax | Unit | Weight per 1000 pcs | ||
| mm | inch | mm | mm | mm | mm | mm | pcs. | kg | |
| 416201 | 5 | 3/16 | 5.3 | 9.0 | 1.0 | 1.05 | 1.3 | 1000 | 0.298 |
| 418001 | 6 | 6.4 | 10.0 | 1.0 | 1.10 | 1.4 | 1000 | 0.330 | |
| 422901 | 8 | 5/16 | 8.4 | 13.0 | 1.5 | 1.60 | 2.0 | 1000 | 0.836 |
| 425020 | 10 | 3/8 | 10.5 | 16.0 | 1.8 | 1.90 | 2.3 | 1000 | 1.501 |
| 427700 | 12 | 13.0 | 18.0 | 1.8 | 1.90 | 2.4 | 500 | 1.731 | |
| 430660 | 14 | 15.0 | 22.0 | 1.8 | 1.95 | 2.5 | 500 | 2.693 | |
| 430750 | 16 | 5/8 | 17.0 | 24.0 | 2.5 | 2.60 | 3.1 | 250 | 4.145 |
| 433621 | 18 | 19.0 | 27.0 | 2.5 | 2.65 | 3.2 | 250 | 5.337 | |
| 435250 | 20 | 21.0 | 30.0 | 2.5 | 2.70 | 3.3 | 250 | 6.709 | |
| 436721 | 22 | 23.0 | 33.0 | 2.5 | 2.70 | 3.4 | 100 | 8.184 | |
| 438021 | 24 | 25.4 | 36.0 | 3.0 | 3.20 | 3.9 | 100 | 11.262 | |
| 441420 | 27 | 28.6 | 39.0 | 3.0 | 3.30 | 4.0 | 100 | 12.360 | |
| 441621 | 30 | 11/8 | 31.6 | 45.0 | 3.0 | 3.55 | 4.3 | 100 | 18.222 |
The UV Series are dimensioned so they can be fitted to bolts or screws from M2.5 to M10.
This is done prior to thread rolling so the safety washers are captive.
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