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 0

Size

3.5

3.5
Large ^②

4
Large ^②

5
Large ^②

6
Large ^②

1/4 ^①

1/4
Large ^① ^②

8
Large ^②

3/8 ^①

Bolt size	Metric
	Inch
d	max
	min
d_c	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
Large ^②

12
Large ^②

1/2 ^①

1/2
Large ^① ^②

14
Large ^②

16
Large ^②

18
Large ^②

Bolt size	Metric
	Inch
d	max
	min
d_c	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
Large ^②

22
Large ^②

24
Large ^②

1 ^①

1
Large ^① ^②

27
Large ^②

30
Large ^②

Bolt size	Metric
	Inch
d	max
	min
d_c	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
Large ^②

36
Large ^②

Bolt size	Metric
	Inch
d	max
	min
d_c	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

Bolt size	Metric
	Inch
d	max
	min
d_c	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

MOQ:	500kg
Price:	Negotiation
Standard Packaging:	25kg Carton+900kg/Pallet or 5KG/CTN
Delivery Period:	30days
Payment Method:	L/C, T/T
Supply Capacity:	400TON/MONTH

MOQ:	500kg
Price:	Negotiation
Standard Packaging:	25kg Carton+900kg/Pallet or 5KG/CTN
Delivery Period:	30days
Payment Method:	L/C, T/T
Supply Capacity:	400TON/MONTH

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Non Standard Fasteners

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Electrical Fasteners

Solar Panel Fasteners

Stainless Steel Shackle

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