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Safety Washers DIN9250 Form S and Form VS

Safety Washers DIN9250 Form S and Form VS Featured Image
  • Safety Washers DIN9250 Form S and Form VS
  • Safety Washers DIN9250 Form S and Form VS
  • Safety Washers DIN9250 Form S and Form VS
  • Safety Washers DIN9250 Form S and Form VS

Short Description:

This range of Safety washers is based on the Disc springs concept. It is also called Double knurling lock washer, Serrated safety washer, and SCHNORR safety washer. The washer has the unique feature of radial serrations on both the concave and convex surfaces. When tightened to near capacity these serrations bite into the mating surfaces, thus preventing the loosening of the screw due to vibration and other similar circumstances.


Product Detail

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► Safety Washers DIN9250 Overview

● Safety Washers DIN9250 Introduction ● Safety Washers DIN9250 Dimensions
● Safety Washers DIN9250 Materials ● Safety Washers DIN9250 Surface treatments
● Safety Washers DIN9250 Advantages and Applications

► Safety Washers DIN9250 Introduction

The Safety washers offer a reduced outside diameter compared with a conventional Disc spring washer. This corresponds to most screw head sizes and is very compatible with the hexagonal socket type screw.

Classification of Safety Washers: 1. Safety Washers, form S; 2. Safety Washers, form VS.

DIN9250 SS
DIN9250 VS SS
DIN9250 VS
DIN9250

► Safety Washers DIN9250 Dimensions

DIN9250
Safety Washers DIN9250, form S, Spring steel 65Mn
Part Number Nominal size d D h Hmin Hmax Weight/M
(mm) (inch) (mm) (mm) (mm) (mm) (mm) (kgs)
DIN 9250S-M1.6   M1.6   1.7  3.2  0.35  0.38  0.60  0.013 
DIN 9250S-M2   M2   2.2  4.0  0.35  0.39  0.60  0.021 
DIN 9250S-M2.5   M2.5   2.7  4.8  0.45  0.49  0.90  0.039 
DIN 9250S-M3   M3 1/8 3.2  5.5  0.45  0.51  0.90  0.049 
DIN 9250S-M3.5   M3.5   3.7  6.0  0.45  0.52  0.90  0.055 
DIN 9250S-M4   M4 5/32 4.3  7.0  0.50  0.59  1.00  0.085 
DIN 9250S-M5   M5 3/16 5.3  9.0  0.60  0.73  1.10  0.167 
DIN 9250S-M6   M6   6.4  10.0  0.70  0.82  1.20  0.200 
DIN 9250S-M6.35   M6.35 1/4 6.7  9.5  0.70  0.79  1.20  0.150 
DIN 9250S-M7   M7   7.4  12.0  0.70  0.89  1.30  0.355 
DIN 9250S-M8   M8 5/16 8.4  13.0  0.80  0.98  1.40  0.392 
DIN 9250S-M10   M10 3/8 10.5  16.0  1.00  1.21  1.60  0.750 
DIN 9250S-M11.1   M11.1 7/16 11.6  15.9  1.00  1.18  1.60  0.595 
DIN 9250S-M12   M12   13.0  18.0  1.10  1.31  1.70  0.879 
DIN 9250S-M12.7   M12.7 1/2 13.7  19.0  1.10  1.33  1.80  0.976 
DIN 9250S-M14   M14 9/16 15.0  22.0  1.20  1.52  2.00  1.641 
DIN 9250S-M16   M16 5/8 17.0  24.0  1.30  1.63  2.10  1.984 
DIN 9250S-M18   M18   19.0  27.0  1.50  1.85  2.30  2.970 
DIN 9250S-M19   M19 3/4 20.0  30.0  1.50  1.98  2.50  4.100 
DIN 9250S-M20   M20   21.0  30.0  1.50  1.94  2.50  3.742 
DIN 9250S-M22   M22 7/8 23.0  33.0  1.50  2.08  2.70  4.507 
DIN 9250S-M24   M24   25.6  36.0  1.60  2.32  2.90  5.910 
DIN 9250S-M25.4   M25.4 1 27.0  38.0  2.00  2.52  3.10  7.449 
DIN 9250S-M27   M27   28.6  39.0  2.00  2.52  3.10  7.369 
DIN 9250S-M30   M30 1-1/8 31.6  45.0  2.00  2.78  3.60  10.780 
DIN 9250S-M33   M33.5 1-1/4 34.0  50.0  2.50  3.25  4.00  19.800 
DIN 9250S-M36   M36 1-3/8 38.0  54.0  2.50  3.38  4.20  21.280 
Safety Washers DIN9250, form S, Stainless steel
Part Number Nominal size d D h Hmin Hmax Weight/M
(mm) (inch) (mm) (mm) (mm) (mm) (mm) (kgs)
DIN 9250S-A1.6   M1.6   1.7  3.2  0.5  0.55  0.75  0.019
DIN 9250S-A2   M2   2.2  4.0  0.5  0.55  0.75  0.029
DIN 9250S-A2.5   M2.5   2.7  4.8  0.5  0.55  0.95  0.042
DIN 9250S-A3   M3 1/8 3.2  5.5  0.5  0.55  0.95  0.042
DIN 9250S-A3.5   M3.5   3.7  6.0  0.7  0.75  1.15  0.084
DIN 9250S-A4   M4 5/32 4.3  7.0  0.7  0.75  1.20  0.081
DIN 9250S-A5   M5 3/16 5.3  9.0  0.7  0.75  1.20  0.209
DIN 9250S-A6   M6   6.4  10.0  0.7  0.75  1.20  0.193
DIN 9250S-A6.35   M6.35 1/4 6.7  9.5  0.7  0.75  1.20  0.172
DIN 9250S-A8   M8 5/16 8.4  13.0  1.0  1.20  1.60  0.557
DIN 9250S-A10   M10 3/8 10.5  16.0  1.0  1.10  1.60  0.731
DIN 9250S-A11.1   M11.1 7/16 11.6  15.9  1.3  1.40  1.85  0.825
DIN 9250S-A12   M12   13.0  18.0  1.3  1.40  1.85  1.099
DIN 9250S-A12.7   M12.7 1/2 13.7  19.0  1.3  1.40  1.95  1.222
DIN 9250S-A14   M14   15.0  22.0  1.5  1.65  2.30  2.244
DIN 9250S-A16   M16 5/8 17.0  24.0  1.5  1.75  2.30  2.487
DIN 9250S-A18   M18   19.0  27.0  1.8  2.05  2.60  3.843
DIN 9250S-A19   M19 3/4 20.0  30.0  1.8  2.20  2.60  5.294
DIN 9250S-A20   M20   21.0  30.0  1.8  2.15  2.80  3.923
DIN 9250S-A22   M22 7/8 23.0  33.0  1.8  2.30  3.00  5.893
DIN 9250S-A24   M24   25.6  36.0  2.0  2.35  3.10  7.508
DIN 9250S-A25.4   M25.4 1 27.0  37.0  2.5  2.85  3.60  10.508
DIN 9250S-A27   M27   28.6  39.0  2.5  2.85  3.60  10.300 
DIN 9250S-A30   M30 1-1/8 31.6  45.0  2.5  3.10  4.10  15.185
DIN 9250S-A36   M36 1-3/8 38.0  54.0  3.0  3.70  4.70  26.218
Safety Washers DIN9250, form VS, Spring steel 65Mn
Part Number Nominal Size d D h Hmin Hmax Weight/M
(mm) (inch) (mm) (mm) (mm) (mm) (mm) (kgs)
DIN 9250VS-M5   M5 3/16 5.3  9.0  1.00  1.07  1.30  0.273 
DIN 9250VS-M6   M6   6.4  10.0  1.00  1.08  1.40  0.300 
DIN 9250VS-M8   M8 5/16 8.4  13.0  1.20  1.32  1.70  0.615 
DIN 9250VS-M10   M10 3/8 10.5  16.0  1.50  1.64  2.00  1.167 
DIN 9250VS-M12   M12   13.0  18.0  1.50  1.65  2.10  1.223 
DIN 9250VS-M14   M14 9/16 15.0  22.0  1.50  1.76  2.20  2.089 
DIN 9250VS-M16   M16 5/8 17.0  24.0  2.00  2.21  2.60  3.142 
DIN 9250VS-M18   M18   19.0  27.0  2.00  2.27  2.70  4.041 
DIN 9250VS-M20   M20   21.0  30.0  2.00  2.34  2.80  5.066 
DIN 9250VS-M22   M22 7/8 23.0  33.0  2.00  2.42  3.00  6.117 
DIN 9250VS-M24   M24   25.6  36.0  2.50  2.87  3.40  8.865 
DIN 9250VS-M27   M27   28.6  39.0  2.50  2.91  3.50  9.731 
DIN 9250VS-M30   M30 1-1/8 31.6  45.0  2.50  3.12  3.80  14.380 
Safety Washers DIN9250, form VS, Stainless steel
Part Number Nominal Size d D h Hmin Hmax Weight/M
(mm) (inch) (mm) (mm) (mm) (mm) (mm) (kgs)
DIN 9250VS-A5   M5 3/16 5.3  9.0  1.00  1.05  1.30  0.298 
DIN 9250VS-A6   M6   6.4  10.0  1.00  1.10  1.40  0.330 
DIN 9250VS-A8   M8 5/16 8.4  13.0  1.50  1.60  2.00  0.836 
DIN 9250VS-A10   M10 3/8 10.5  16.0  1.80  1.90  2.30  1.501 
DIN 9250VS-A12   M12   13.0  18.0  1.80  1.90  2.40  1.731 
DIN 9250VS-A14   M14 9/16 15.0  22.0  1.80  1.95  2.50  2.693 
DIN 9250VS-A16   M16 5/8 17.0  24.0  2.50  2.60  3.10  4.145 
DIN 9250VS-A18   M18   19.0  27.0  2.50  2.65  3.20  5.337 
DIN 9250VS-A20   M20   21.0  30.0  2.50  2.70  3.30  6.709 
DIN 9250VS-A22   M22 7/8 23.0  33.0  2.50  2.70  3.40  8.184 
DIN 9250VS-A24   M24   25.4  36.0  3.00  3.20  3.90  11.262 
DIN 9250VS-A27   M27   28.6  39.0  3.00  3.30  4.00  12.360 
DIN 9250VS-A30   M30 1-1/8 31.6  45.0  3.00  3.55  4.30  18.222 

► Safety Washers DIN9250 Materials

Materials Product Instructions
Spring steel: 65Mn ≤200°C, used in a regular environment.
Stainless steel: SUS304, SUS316(A2, A4) ≤300°C, used in corrosive environment.
Customized. Any technical questions, please contact us at info@techstamping.com

► Safety Washers DIN9250 Surface Treatments

Surface Treatments
● Black Oxide ● Dacromet ● Geomet
● Zinc Cr+3 ● Yellow Zinc ● Customized

► Safety Washers DIN9250 Advantages and Applications

Advantages Applications
Tooth structure ensures large amplitude of vibration protection, high pre-tightening force, not easy to loosen. Automobile industry
Disc design ensures uniform load distribution, and prevents bending torque loss and bolt deformation Railways and bridges
Unique radial serrations can avoid damaging the contact surface when locking. Shipping industry
Closed ring design ensures no bursting when pre-tightening. Construction
It's affordable as a variety of materials and surface treatments are available. Medical devices
The washer conforms to the principle of bolt anti-loosening, tightening torque and locking structure. Petrochemical equipments

We appreciate your support to Technical Stamping(Shanghai) Co., Ltd. up Return to homepage

► Safety Washers DIN9250 FAQ

Q1. Can you provide customization services?

A. Yes, T&S initially manufactures standard flat washers, lock washers and conical washers, but in the past 17 years, T&S has already developed successfully 980 customized parts in different sizes.

Q2. What types of customized parts do you provide?

A. T&S provides stamping parts, sheet metal parts, machining parts, cold heading parts, hot forging parts, cold working parts, Zn-Al die casting parts, powder metallurgy parts, and other customized parts.
T&S is capable of providing customized parts not only with single-process, but also with a variety of combined crafts.

Q3. Does every customized part need mould fee? 

A. Not all customized parts cost mould fee. For example, a turning part does not need a mould yet requires the appropriate tools and fixtures. T&S spends time and labor making samples, therefore charges certain sample fees.

Q4. Where are your factories, can I have a visit? 

A. T&S has its factories. We have invested in multiple factories, which are mainly located in Zhejiang and Jiangsu Province. You can visit the corresponding factories depending on the products to be purchased. Please feel free to visit our factories and offer guidance. We can pick you up at the nearest airport or train station.

Q5. Can you provide free samples?

A. Yes, for standard fasteners we can provide free samples. Please kindly understand that we charge certain fees before making customized samples.

Q6. How do you guarantee quality?

A. T&S conducts quality control in strict accordance with the ISO9001 Quality Certification System. T&S practices the worker's self-inspection and routing inspection on a regular basis during production, the QC strict sampling before packaging and delivery after compliance. Each batch of products is accompanied by Inspection Certificate from T&S and Raw Material Test Report from the steel factory.

Q7. If I have paid the mould fee yet receive nonconforming samples, what will you do?

A. For the first development of non-standard parts, we refund the mould fee in case of 2 times of nonconforming samples delivered. If you give us more chances to make the moulds, we will continue to study until success.

Q8. What is your MOQ? Any mould fee? Is the mould fee refundable?

A. MOQ for non-standard fasteners: 1-2 tons according to different parts. We charge mould fees, which will be refunded when reaching a certain quantity, more to be described in our quotation.
B. MOQ for stamping parts : Depending on the degree of difficulty and dimensions of the parts. We will charge mould fee and refund it when reaching a certain quantity, more to be described in our quotation.
C. MOQ for turning parts is 100 pieces, and no mould fee to be charged. But if you need samples for confirming, we will charge sample fee and refund it after doing the order.

Q9. What is your delivery time?

A: 15-30 days for samples, 25-50 days for mass production.

Q10. Do you accept the use of our own logo?

A. If the order quantity is large, we absolutely accept OEM.

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