DIN1804 Internal Tab Washers M8 Slotted Hole Washers for Mining Industry
Our DIN1804 internal tab washers are specially designed for mining equipment and heavy industrial applications, available in size M8 with a slotted hole structure for reliable anti-loosening performance. Manufactured strictly in accordance with DIN1804 standard, these washers feature an internal tab design that locks firmly onto bolts or shafts, effectively preventing rotation and loosening under strong vibration, heavy impact, and harsh working conditions commonly found in mining sites.
The slotted hole configuration ensures precise fitting and stable positioning, while the robust material construction provides excellent hardness, wear resistance, and deformation resistance to meet the demanding requirements of mining machinery, conveyor systems, and heavy-duty assembly. Precision stamping and forming guarantee consistent dimensions, smooth edges, and high interchangeability with standard fasteners.
Each washer undergoes strict quality inspection including hardness testing, dimensional accuracy check, and durability verification to ensure stable performance in long-term operation. Widely used in mining equipment, construction machinery, transmission devices, and heavy industrial assembly, these DIN1804 M8 internal tab slotted hole washers deliver superior locking effect and reliable protection for critical fastening connections in tough working environments.
Specification
Internal Tab Washers:The material of the inner tongue stop washer is low carbon steel, medium carbon steel, 65 manganese, stainless steel, aluminum, copper, insulating material, etc. Surface treatment using blue and white zinc plating, color zinc, black zinc, nickel, chromium, blackening, mechanical galvanizing, plating dacro, quenching, tempering, carburizing, etc.
| Nominal Diameter |
Φ6 |
Φ8 |
Φ10 |
Φ12 |
Φ14 |
Φ16 |
Φ18 |
Φ20 |
Φ22 |
Φ24 |
Φ26 |
Φ28 |
Φ30 |
| d1 |
Min |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
22 |
24 |
26 |
28 |
30 |
| Max |
6.075 |
8.09 |
10.09 |
12.11 |
14.11 |
16.11 |
18.11 |
20.13 |
22.13 |
24.13 |
26.13 |
28.13 |
30.13 |
| d2 |
Max |
16 |
20 |
25 |
28 |
30 |
32 |
34 |
36 |
40 |
42 |
45 |
50 |
50 |
| Min |
15.89 |
19.87 |
24.87 |
27.87 |
29.87 |
31.84 |
33.84 |
35.84 |
39.84 |
41.84 |
44.84 |
49.84 |
49.84 |
| s |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1.2 |
| f |
DN |
3 |
3 |
4 |
5 |
5 |
5 |
6 |
6 |
6 |
6 |
7 |
7 |
7 |
| Max |
2.94 |
2.94 |
3.93 |
4.93 |
4.93 |
4.93 |
5.93 |
5.93 |
5.93 |
5.93 |
6.92 |
6.92 |
6.92 |
| Min |
2.88 |
2.88 |
3.855 |
4.855 |
4.855 |
4.855 |
5.855 |
5.855 |
5.855 |
5.855 |
6.83 |
6.83 |
6.83 |
| g |
Min=DN |
3.9 |
5.9 |
7.4 |
9.3 |
11.4 |
13.5 |
15.4 |
17.5 |
19.5 |
21.6 |
23.5 |
25.5 |
27.5 |
| Max |
3.975 |
5.975 |
7.49 |
9.39 |
11.51 |
13.61 |
15.51 |
17.61 |
19.63 |
21.73 |
23.63 |
25.63 |
27.63 |
| h |
2.5 |
2.5 |
3 |
3 |
3 |
3 |
4 |
4 |
4 |
4 |
5 |
5 |
|
| Nominal Diameter |
Φ32 |
Φ35 |
Φ38 |
Φ40 |
Φ42 |
Φ45 |
Φ48 |
Φ50 |
Φ52 |
Φ55 |
Φ58 |
Φ60 |
Φ62 |
| d1 |
Min |
32 |
35 |
38 |
40 |
42 |
45 |
48 |
50 |
52 |
55 |
58 |
60 |
62 |
| Max |
32.16 |
35.16 |
38.16 |
40.16 |
42.16 |
45.16 |
48.16 |
50.16 |
52.19 |
55.19 |
58.19 |
60.19 |
62.19 |
| d2 |
Max |
52 |
55 |
58 |
62 |
62 |
68 |
75 |
75 |
80 |
80 |
90 |
90 |
95 |
| Min |
51.81 |
54.81 |
57.81 |
61.81 |
61.81 |
67.81 |
74.81 |
74.81 |
79.81 |
79.81 |
89.78 |
89.78 |
94.78 |
| s |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.5 |
1.5 |
1.5 |
| f |
DN |
7 |
7 |
8 |
8 |
8 |
8 |
8 |
8 |
10 |
10 |
10 |
10 |
10 |
| Max |
6.92 |
6.92 |
7.92 |
7.92 |
7.92 |
7.92 |
7.92 |
7.92 |
9.92 |
9.92 |
9.92 |
9.92 |
9.92 |
| Min |
6.83 |
6.83 |
7.83 |
7.83 |
7.83 |
7.83 |
7.83 |
7.83 |
9.83 |
9.83 |
9.83 |
9.83 |
9.83 |
| g |
Min=DN |
29.6 |
32.6 |
35.3 |
37.3 |
39.3 |
42.4 |
45.4 |
47.4 |
49.3 |
52.3 |
55.3 |
57.3 |
59.3 |
| Max |
29.73 |
32.76 |
35.46 |
37.46 |
39.46 |
42.56 |
45.56 |
47.56 |
49.46 |
52.49 |
55.49 |
57.49 |
59.49 |
| h |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
6 |
6 |
6 |
6 |
|
| |
| Nominal Diameter |
Φ65 |
Φ68 |
Φ70 |
Φ72 |
Φ75 |
Φ80 |
Φ85 |
Φ90 |
Φ95 |
Φ100 |
Φ105 |
Φ110 |
Φ115 |
| d1 |
Min |
65 |
68 |
70 |
72 |
75 |
80 |
85 |
90 |
95 |
100 |
105 |
110 |
115 |
| Max |
65.19 |
68.19 |
70.19 |
72.19 |
75.19 |
80.19 |
85.22 |
90.22 |
95.22 |
100.22 |
105.22 |
110.22 |
115.22 |
| d2 |
Max |
95 |
100 |
100 |
110 |
110 |
115 |
120 |
130 |
135 |
145 |
155 |
155 |
165 |
| Min |
94.78 |
99.78 |
99.78 |
109.78 |
109.78 |
114.78 |
119.78 |
129.75 |
134.75 |
144.75 |
154.75 |
154.75 |
164.75 |
| s |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
| f |
DN |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
12 |
12 |
12 |
12 |
12 |
| Max |
9.92 |
9.92 |
9.92 |
9.92 |
9.92 |
9.92 |
9.92 |
9.92 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
| Min |
9.83 |
9.83 |
9.83 |
9.83 |
9.83 |
9.83 |
9.83 |
9.83 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
| g |
Min=DN |
62.4 |
65.4 |
67.4 |
68.9 |
71.9 |
76.9 |
81.9 |
86.9 |
91.8 |
96.9 |
102 |
107 |
112 |
| Max |
62.59 |
65.59 |
67.59 |
69.09 |
72.09 |
77.09 |
82.12 |
87.12 |
92.02 |
97.12 |
102.22 |
107.22 |
112.22 |
| h |
6 |
6 |
6 |
7 |
7 |
7 |
7 |
7 |
8 |
8 |
8 |
8 |
8 |
| Nominal Diameter |
Φ120 |
Φ125 |
Φ130 |
Φ140 |
Φ150 |
Φ160 |
Φ170 |
Φ180 |
Φ190 |
Φ200 |
| d1 |
Min |
120 |
125 |
130 |
140 |
150 |
160 |
170 |
180 |
190 |
200 |
| Max |
120.22 |
125.25 |
130.25 |
140.25 |
150.25 |
160.25 |
170.25 |
180.25 |
190.29 |
200.29 |
| d2 |
Max |
165 |
180 |
180 |
195 |
205 |
220 |
230 |
245 |
260 |
270 |
| Min |
164.75 |
179.75 |
179.75 |
194.71 |
204.71 |
219.71 |
229.71 |
244.71 |
259.68 |
269.68 |
| s |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
| f |
DN |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
| Max |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
11.905 |
| Min |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
11.795 |
| g |
Min=DN |
117 |
122 |
127 |
137 |
147 |
157 |
167 |
177 |
187 |
197 |
| Max |
117.22 |
122.25 |
127.25 |
137.25 |
147.25 |
157.25 |
167.25 |
177.25 |
187.29 |
197.29 |
| h |
8 |
8 |
8 |
8 |
8 |
10 |
10 |
10 |
10 |
10 |

Packing& Shipping
1) Sample order, 20/25kg per carton with our logo or neutral package;
2) For Large orders, we can custom packaging;
3) Normal Packing: 1000/500/250pcs per small box. then into cartons and pallet;
4) According to customers' requirements.
FAQ
1.How do you let me trust you?
We are a Golden supplier in Alibaba who do business for more than 5 years. You can make an order by Alibaba to us directly.
2.How about your price?
High-quality products with a reasonable price suitable for your market.
3.How do you control your quality?
We request a QC inspection for each batch of goods. And we can provide you inspection report and mill certificate if you want..
4.Could you provide free samples?
For new customers, We can provide free samples for standard fasteners. But the clients will pay the express charges. For regular customers, We will send you free samples and pay express charges by ourselves.
5.How about your delivery time?
Generally speaking, All the goods have stock with little quantity, we can delivery them with one week. If the quantity is 1-2container, we can give you with 30-45days.
6.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallet is about 900-960kg, We also can make the customer's logo on the cartons. Or we customized cartons according to customers' requirement, If you need small box packing, we can do according to your requirement.
7.What is your payment term?
We can accept T/T,LC for general order. For new customer, we request 20%-50% T/T in advance, and balance payment should against B/L copy. For regular customer, we can provide delay payment after B/L date about 30-90 days.