DIN 939 Standard Double End Thread Rod Stud Bolt 3/8 5/16 Stainless Steel Threaded Rod Stud
| Stainless Steel Double End Threaded Rod Stud |
| Material: |
Carbon Steel, Stainless Steel, Brass etc. |
| Standards: |
DIN, ISO, ASME,JIS, etc. |
| Size: |
M4-M52 |
| Class: |
Gr4.8, Gr8.8, A2-70, A4-80 |
| Finish: |
Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc. |
Thread Size d |
M4 |
M5 |
M6 |
(M7) |
M8 |
M10 |
M12 |
(M14) |
M16 |
(M18) |
M20 |
| P |
Pitch |
0.7 |
0.8 |
1 |
1 |
1.25 |
1.5 |
1.75 |
2 |
2 |
2.5 |
2.5 |
| Fine thread |
/ |
/ |
/ |
/ |
1 |
1.25 |
1.25 |
1.5 |
1.5 |
1.5 |
1.5 |
| Very fine thread |
/ |
/ |
/ |
/ |
/ |
/ |
1.5 |
/ |
/ |
/ |
/ |
| b1 |
5 |
6.5 |
7.5 |
9 |
10 |
12 |
15 |
18 |
20 |
22 |
25 |
| b2 |
L≤125 |
14 |
16 |
18 |
20 |
22 |
26 |
30 |
34 |
38 |
42 |
46 |
| 125 |
20 |
22 |
24 |
26 |
28 |
32 |
36 |
40 |
44 |
48 |
52 |
| L>200 |
/ |
/ |
/ |
/ |
/ |
45 |
49 |
53 |
57 |
61 |
65 |
| x1 |
1.75 |
2 |
2.5 |
2.5 |
3.2 |
3.8 |
4.3 |
5 |
5 |
6.3 |
6.3 |
| x2 |
0.9 |
1 |
1.25 |
1.25 |
1.6 |
1.9 |
2.2 |
2.5 |
2.5 |
3.2 |
3.2 |








| Q1: What thread standards do you follow? |
| A1: Our screws comply with DIN, ISO, ANSI, and JIS standards, and can also be customized according to customer drawings. |
| Q2: How do you pack the screws for export? |
| A2: Standard packing includes bulk cartons with inner boxes or small polybags, placed on pallets for container shipping. Custom boxes or barcoded packaging are available. |
| Q3: Do you provide samples before mass production? |
| A3: Yes, we offer free or low-cost samples for quality and dimension confirmation prior to order. |
| Q4: How do you control product quality? |
| A4: Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards. |
| Q5: Do you offer OEM or customized production? |
| A5: Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling. |
| Q6: What industries do your self-tapping screws serve? |
| A6: Our screws are widely used in automotive, electronics, construction, furniture, and machinery assembly industries. |