Lock Washers For Nuts - DIN 25201

QBH Lock Washers prevent nuts and bolts from becoming loose because of vibration or dynamic load. They have a wedge-locking action which uses tension rather than friction. They can only be used in conjunction with a conventional bolt. The rise of the cams between the Lock Locking Washers is greater than the pitch of the bolt. In addition, there are radial teeth on the opposite side.

The locking washers are supplied and installed in pairs - cam face to cam face. When the bolt/nut is tightened, the teeth grip and seat onto the mating surfaces. The washers lock in place, allowing movement only across the face of the cams. Any tendency for the bolt/nut to loosen is blocked by the wedge effect of the cams. This positively locks the fastener even when it is subjected to vibration or dynamic loads.

QBH Lock Locking Washers have a high corrosion resistance and can be reused up to 5 times.
They are available in in thread sizes from M3 to M42 and diameters from 7mm to 63mm and they meet the DIN25201 standard.

Advantages:
• Resist loosening caused by vibration or movement
• Ease of assembly and disassembly
• Locking function is not lost by lubrication
• Positive locking at low and high preload levels
• Same temperature characteristics as standard bolt/nut
• Reusable up to 5 times

Typical applications:

Construction equipment, Automotive and Trucking industry, Agricultural equipment, Utilities, Manufacturing Equipment, Railroad equipment, Process industries

Material - Available in Steel and Stainless Steel

DIN 25201 Double fold self-locking washer(Steel/Stainless Steel)

Stamping Lock Washers Dacromet Surface For Nuts DIN 25201

Size
3 3.5 3.5
Large ②		 4 4
Large ②		 5 5
Large ②		 6 6
Large ②		 1/4 ① 1/4
Large ① ②		 8 8
Large ②		 3/8 ①
Bolt size Metric
Inch
d max
min
dc Nominal Size
max
min
h Steel Nominal Size
max
min
per 1000 units≈kg ③ Steel ≈
h Stainless Steel Nominal Size
max
min
per 1000 units≈kg ③ Stainless Steel ≈
M3 M3.5 M3.5 M4 M4 M5 M5 M6 M6 - - M8 M8 -
#5 #6 #6 #8 #8 #10 #10 - - 1/4” 1/4” 5/16” 5/16” 3/8”
3.50 4.00 4.00 4.50 4.50 5.50 5.50 6.60 6.60 7.30 7.30 8.80 8.80 10.50
3.30 3.80 3.80 4.30 4.30 5.30 5.30 6.40 6.40 7.10 7.10 8.60 8.60 10.10
7.0 7.6 9.0 7.6 9.0 9.0 10.8 10.8 13.5 11.5 13.5 13.5 16.6 16.6
7.20 7.80 9.20 7.80 9.20 9.20 11.00 11.00 13.70 11.70 13.70 13.70 16.80 16.80
6.80 7.40 8.80 7.40 8.80 8.80 10.60 10.60 13.30 11.30 13.30 13.30 16.40 16.40
1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 2.5 2.5 2.5 2.5 2.5 2.5
2.05 2.05 2.05 2.05 2.05 2.05 2.05 2.05 2.75 2.75 2.75 2.75 2.75 2.75
1.55 1.55 1.55 1.55 1.55 1.55 1.55 1.55 2.25 2.25 2.25 2.25 2.25 2.25
0.30 0.40 0.60 0.40 0.60 0.50 1.10 0.70 2.00 0.80 1.80 1.50 2.80 2.30
2.20 2.20 2.20 2.20 2.20 2.20 2.20 2.20 2.00 2.20 2.20 2.00 2.00 2.00
2.45 2.45 2.45 2.45 2.45 2.45 2.45 2.45 2.25 2.45 2.45 2.25 2.25 2.25
1.95 1.95 1.95 1.95 1.95 1.95 1.95 1.95 1.75 1.95 1.95 1.75 1.75 1.75
0.40 0.40 0.70 0.40 0.70 0.60 1.10 0.90 1.60 0.90 1.50 1.20 2.30 1.90
Size
3/8
Large ① ②		 10 10
Large ②		 11 12 12
Large ②		 1/2 ① 1/2
Large ① ②		 14 14
Large ②		 16 16
Large ②		 18 18
Large ②
Bolt size Metric
Inch
d max
min
dc Nominal Size
max
min
h Steel Nominal Size
max
min
per 1000 units≈kg ③ Steel ≈
h Stainless Steel Nominal Size
max
min
per 1000 units≈kg ③ Stainless Steel ≈
- M10 M10 M11 M12 M12 - - M14 M14 M16 M16 M18 M18
3/8” - - 7/16” - - 1/2” 1/2” 9/16” 9/16” 5/8” 5/8” - -
10.50 10.90 10.90 11.60 13.20 13.20 13.70 13.70 15.40 15.40 17.20 17.20 19.70 19.70
10.10 10.50 10.50 11.20 12.80 12.80 13.30 13.30 15.00 15.00 16.80 16.80 19.30 19.30
21.0 16.6 21.0 18.5 19.5 25.4 19.5 25.4 23.0 30.7 25.4 30.7 29.0 34.5
21.20 16.80 21.20 18.70 19.70 25.60 19.70 25.60 23.20 30.90 25.60 30.90 29.20 34.70
20.80 16.40 20.80 18.30 19.30 25.20 19.30 25.20 22.80 30.50 25.20 30.50 28.80 34.30
2.5 2.5 2.5 2.5 2.5 3.4 2.5 3.4 3.4 3.4 3.4 3.4 3.4 3.4
2.75 2.75 2.75 2.75 2.75 3.65 2.75 3.65 3.65 3.65 3.65 3.65 3.65 3.65
2.25 2.25 2.25 2.25 2.25 3.15 2.25 3.15 3.15 3.15 3.15 3.15 3.15 3.15
4.80 2.20 4.70 2.90 2.90 9.30 2.70 9.00 5.60 14.10 6.70 12.80 8.90 15.80
2.00 2.00 2.00 2.20 2.00 3.00 2.00 3.20 3.00 3.20 3.00 3.20 3.20 3.20
2.25 2.25 2.25 2.45 2.25 3.25 2.25 3.45 3.25 3.45 3.25 3.45 3.45 3.45
1.75 1.75 1.75 1.95 1.75 2.75 1.75 2.95 2.75 2.95 2.75 2.95 2.95 2.95
3.80 1.80 3.70 2.60 2.30 8.20 2.20 8.00 4.90 13.10 5.90 11.30 8.00 15.60
Size
3/4 ① 3/4
Large ① ②		 20 20
Large ②		 22 22
Large ②		 24 24
Large ②		 1 ① 1
Large ① ②		 27 27
Large ②		 30 30
Large ②
Bolt size Metric
Inch
d max
min
dc Nominal Size
max
min
h Steel Nominal Size
max
min
per 1000 units≈kg ③ Steel ≈
h Stainless Steel Nominal Size
max
min
per 1000 units≈kg ③ Stainless Steel ≈
- - M20 M20 M22 M22 M24 M24 - - M27 M27 M30 M30
3/4” 3/4” - - 7/8” 7/8” - - 1” 1” - - 1 1/8” 1 1/8”
20.20 20.20 21.60 21.60 23.60 23.60 25.50 25.50 28.10 28.10 28.60 28.60 31.60 31.60
19.80 19.80 21.20 21.20 23.20 23.20 25.10 25.10 27.70 27.70 28.20 28.20 31.20 31.20
30.7 39.0 30.7 39.0 34.5 42.0 39.0 48.5 39.0 48.5 42.0 48.5 47.0 58.5
30.90 39.20 30.90 39.20 34.70 42.20 39.20 48.70 39.30 48.80 42.30 48.80 47.30 58.80
30.50 38.80 30.50 38.80 34.30 41.80 38.80 48.30 38.70 48.20 41.70 48.20 46.70 58.20
3.4 3.4 3.4 3.4 3.4 4.6 3.4 4.6 3.4 4.6 5.8 5.8 5.8 6.6
3.65 3.65 3.65 3.65 3.65 4.85 3.65 4.85 3.65 4.85 6.05 6.05 6.05 6.60
3.15 3.15 3.15 3.15 3.15 4.35 3.15 4.35 3.15 4.35 5.55 5.55 5.55 6.10
10.50 22.10 9.30 20.90 12.50 31.90 17.40 45.10 15.30 42.00 31.40 52.70 41.00 85.80
3.20 3.20 3.00 3.20 3.20 3.20 3.20 3.20 3.20 3.20 6.80 6.80 6.80 6.80
3.45 3.45 3.25 3.45 3.45 3.45 3.45 3.45 3.20 3.20 6.80 6.80 6.80 6.80
2.95 2.95 2.75 2.95 2.95 2.95 2.95 2.95 2.70 2.70 6.30 6.30 6.30 6.30
9.60 21.00 8.20 20.60 12.30 22.20 15.90 35.00 14.20 27.90 34.50 53.40 44.90 91.80
Size
33 33
Large ②		 36 36
Large ②		 39 42 45 48 52 56 60 64 68 72
Bolt size Metric
Inch
d max
min
dc Nominal Size
max
min
h Steel Nominal Size
max
min
per 1000 units≈kg ③ Steel ≈
h Stainless Steel Nominal Size
max
min
per 1000 units≈kg ③ Stainless Steel ≈
M33 M33 M36 M36 M39 M42 M45 M48 M52 M56 M60 M64 M68 M72
1 1/4” 1 1/4” 1 3/8” 1 3/8” 1 1/2” - 1 3/4” - 2” 2 1/4” - 2 1/2” - -
34.60 34.60 37.60 37.60 40.60 43.40 46.70 50.10 54.10 59.60 63.60 67.60 71.60 75.60
34.20 34.20 37.20 37.20 40.20 43.00 46.20 49.60 53.60 59.10 63.10 67.10 71.10 75.10
48.5 58.5 55.0 63.0 58.5 63.0 70.0 75.0 80.0 85.0 90.0 95.0 100.0 105.0
48.80 58.80 55.30 63.30 58.80 63.30 70.00 75.00 80.00 85.00 90.00 95.00 100.00 105.00
48.20 58.20 54.70 62.70 58.20 62.70 68.00 73.00 78.00 83.00 88.00 93.00 98.00 103.00
5.8 6.6 5.8 6.6 5.8 5.8 7.0 7.0 7.0 7.0 7.0 7.0 9.5 9.5
6.05 6.60 6.05 6.60 6.05 6.05 7.75 7.75 7.75 7.75 7.75 7.75 10.25 10.25
5.55 6.10 5.55 6.10 5.55 5.55 6.25 6.25 6.25 6.25 6.25 6.25 8.75 8.75
38.90 80.00 54.90 91.50 58.90 79.70 102.00 120.00 130.00 135.00 152.00 167.00 282.00 307.00
6.80 / 6.80 / 6.80 6.80 6.80 6.80 9.00 9.00 9.00 9.00 9.00 9.00
6.80 / 6.80 / 6.80 6.80 7.55 7.55 9.75 9.75 9.75 9.75 9.75 9.75
6.30 / 6.30 / 6.30 6.30 6.05 6.05 8.25 8.25 8.25 8.25 8.25 8.25
42.80 / 59.60 / 67.40 75.00 102.00 120.00 180.40 213.00 235.00 258.00 282.00 307.00
Size
76 80 85 90 95 100 105 110 115 120 125 130
Bolt size Metric
Inch
d max
min
dc Nominal Size
max
min
h Steel Nominal Size
max
min
per 1000 units≈kg ③ Steel ≈
h Stainless Steel Nominal Size
max
min
per 1000 units≈kg ③ Stainless Steel ≈
M76 M80 M85 M90 M95 M100 M105 M110 M115 M120 M125 M130
3” 3 1/8” - - - 4” - - - - - 5”
79.60 83.60 88.60 92.90 97.90 103.90 108.90 113.90 118.90 123.90 128.90 133.90
79.10 83.10 88.10 92.40 97.40 103.40 108.40 113.40 118.40 123.40 128.40 133.40
110.0 115.0 120.0 130.0 135.0 145.0 150.0 155.0 165.0 170.0 173.0 178.0
110.00 115.00 120.00 130.00 135.00 145.00 150.00 155.00 165.00 170.00 173.00 178.00
108.00 113.00 118.00 128.00 133.00 143.00 148.00 153.00 163.00 168.00 171.00 176.00
9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5
10.25 10.25 10.25 10.25 10.25 10.25 10.25 10.25 10.25 10.25 10.25 10.25
8.75 8.75 8.75 8.75 8.75 8.75 8.75 8.75 8.75 8.75 8.75 8.75
333.00 360.00 378.00 477.00 498.00 589.00 613.00 635.00 753.00 779.00 766.00 792.00
9.00 9.00 / / / / / / / / / /
9.75 9.75 / / / / / / / / / /
8.25 8.25 / / / / / / / / / /
333.00 360.00 / / / / / / / / / /
①,The specification is in inches.
②,Large Type
③,“Thousands of pieces” can be understood as “the weight of each thousand sets of washers”

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

6boxes/CTN,36CTNS/PALLET

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

  • QBH brand sales to the main quality assurance.
  • Years of export trade management, excellent service, word-of-mouth guarantee.
  • By working with TUV,escort for quality.
  • Customization of non-standard parts can be made according to customer's requirements and drawings.
  • For quality customers,we can provide a certain credit period.

FAQ

1. How do you let me trust you.
Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.
2. How about your price.
We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.
3. How do you control your quality.
Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods
4. Could you provide free samples?
For new customer, We can provide free samples for standard fastener, But the clients will pay the express
charges. For old customer, We will send you free samples and pay express charges by ourself.
5. Do you accept small order?
QBH company can accept small orders if we have them in stock.Generally speaking,the stock probability of stainless steel fasteners is higher than that of carbon steel fasteners.
6. How about your delivery time
What we pursure is the high efficiency movement pattern,the stainless steel fastener delivery time about 15days,the carbon steel fastener will it about 30days
7. What is your packing.
Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on the pallet,QBH company personalized packagingis also available,like 10PCS/plastic bag or 10pcs/box,it can print some information
such as LOGO and pattern of customers.
8. What is your payment term
Normally,our terms of payment are TT and L/C,if we cooperate for a long time,we can reach the point of mutual trust,and fully support our customers to become bigger and stronger in the local market.
Not only in the price concessions,but also in the payment can also be made on credit,Specific credit sales time needs to be negotiated separately