Product Description
High Quality Special Hex Bolt Black is a fastener consisting of two parts, the head and the screw, which shall be matched with the nut for fastening and connecting two parts with through holes. This high quality hex bolts feature a hexagonal head, which is designed to be driven by a wrench. Hex bolts together with the matching nuts are usually used to join two pieces of fitting and fixtures. Many steel structure and building fittings are fixed together with the hex bolts black.
Advantages
High Quality Special Hex Bolt Black is suitable for important occasions, where the assembly precision is high, and it can bear large impact, vibration or alternating load. It has the characteristics of easy installation and tightening, large bearing capacity, corrosion resistance, high temperature resistance and so on. We can offer you different specifications of the products.

Diameter of Screw(D) | Coarse Tooth Spacing(P) | Head to Side(S) | Head Thickness |
M4 | 0.7 | 7 | 2.8±0.3 |
M5 | 0.8 | 8 | 3.5±0.3 |
M6 | 1 | 10 | 4.0±0.3 |
M8 | 1.25 | 13 | 5.3±0.3 |
M10 | 1.5 | 16 | 6.4±0.3 |
M12 | 1.75 | 18 | 7.5±0.3 |
M14 | 2 | 21 | 8.8±0.3 |
M16 | 2 | 24 | 10.0±0.3 |
The above specification is a single batch of manual measurement, there is a certain error, mind carefully or contact customer service. Unit: mm
We produce all types of standard or non-standard thread screws according to customer's request.Detailed as following table:
Specification Table of Thread Screw | |||||
Standard | Size | Pitch of thread (mm) | d(mm) | Wire Diameter ±0.02mm | |
Max | Min | ||||
Chinese National Standard Coarse Thread 60° | M5 | 0.80 | 4.98 | 4.83 | 4.30 |
M6 | 1.00 | 5.97 | 5.82 | 5.18 | |
M7 | 1.00 | 6.97 | 6.82 | 6.18 | |
M8 | 1.25 | 7.96 | 7.79 | 7.02 | |
M9 | 1.25 | 8.96 | 8.79 | 8.01 | |
M10 | 1.50 | 9.96 | 9.77 | 8.84 | |
M11 | 1.50 | 10.97 | 10.73 | 9.84 | |
M12 | 1.75 | 11.95 | 11.76 | 10.7 | |
M14 | 2.00 | 13.95 | 13.74 | 12.5 | |
M16 | 2.00 | 15.95 | 15.74 | 14.5 | |
M18 | 2.50 | 17.95 | 17.71 | 16.20 | |
M20 | 2.50 | 19.95 | 19.71 | 18.2 | |
Chinese National Standard Fine Thread 60° | M5 | 0.50 | 4.97 | 4.86 | 4.57 |
M6 | 0.75 | 5.97 | 5.85 | 5.41 | |
M7 | 0.75 | 6.97 | 6.85 | 6.41 | |
M8 | 1.00 | 7.97 | 7.83 | 7.24 | |
M9 | 1.00 | 8.97 | 8.83 | 8.24 | |
M10 | 1.00 | 9.97 | 9.82 | 9.23 | |
M10 | 1.25 | 9.96 | 9.81 | 9.07 | |
M12 | 1.25 | 11.97 | 11.76 | 11.07 | |
M12 | 1.50 | 11.96 | 11.79 | 10.89 | |
M14 | 1.50 | 13.96 | 13.79 | 12.89 | |
M16 | 1.50 | 15.96 | 15.79 | 14.89 | |
M18 | 1.50 | 17.95 | 17.73 | 16.86 | |
M20 | 1.50 | 19.95 | 19.65 | 18.85 |
Specification Table of Thread Screw | |||||
Standard | Size | Thread per inch | d(mm) | Wire Diameter ±0.02mm | |
Max | Min | ||||
British Standard Whitworth Thread (Coarse) 55° | 1/8 | 40 | 3.145 | 3.03 | 2.70 |
5/32 | 32 | 3.945 | 3.795 | 3.38 | |
3/16 | 24 | 4.732 | 4.592 | 4.00 | |
1/4 | 20 | 6.32 | 6.165 | 5.45 | |
5/16 | 18 | 7.905 | 7.737 | 6.94 | |
3/8 | 16 | 9.49 | 9.312 | 8.4 | |
7/16 | 14 | 11.2 | 10.88 | 9.84 | |
1/2 | 12 | 12.66 | 12.46 | 11.22 | |
9/16 | 12 | 14.25 | 14.04 | 12.81 | |
5/8 | 11 | 15.83 | 15.61 | 14.27 | |
Unified Coarse Pitch Thread ( American Standard) 60° | 4# | 40 | 2.824 | 2.695 | 2.37 |
5# | 40 | 3.154 | 3.026 | 2.69 | |
6# | 32 | 3.484 | 3.333 | 2.91 | |
8# | 32 | 4.142 | 3.991 | 3.57 | |
10# | 24 | 4.80 | 4.618 | 4.05 | |
12# | 24 | 5.461 | 5.279 | 4.7 | |
1/4 | 20 | 6.322 | 6.117 | 5.45 | |
5/16 | 18 | 7.907 | 7.687 | 6.93 | |
3/8 | 16 | 9.491 | 9.254 | 8.40 | |
7/16 | 14 | 11.08 | 10.82 | 9.83 | |
1/2 | 13 | 12.66 | 12.39 | 11.32 | |
9/16 | 12 | 14.25 | 13.96 | 12.8 | |
5/8 | 11 | 15.83 | 15.53 | 14.26 | |
Unified Fine Pitch Thread ( American Standard) 60° | 4# | 48 | 2.877 | 2.713 | 2.44 |
5# | 44 | 3.157 | 3.036 | 2.73 | |
6# | 40 | 3.484 | 3.356 | 3.02 | |
8# | 36 | 4.145 | 4.006 | 3.63 | |
10# | 32 | 4.803 | 4.651 | 4.23 | |
12# | 28 | 5.461 | 5.296 | 4.81 | |
1/4 | 28 | 6.324 | 6.16 | 5.68 | |
5/16 | 24 | 7.909 | 7.727 | 7.16 | |
3/8 | 24 | 9.497 | 9.315 | 8.74 | |
7/16 | 20 | 11.08 | 10.87 | 10.18 | |
1/2 | 20 | 12.67 | 12.46 | 11.76 | |
9/16 | 18 | 14.25 | 14.03 | 13.25 | |
5/8 | 18 | 15.83 | 15.62 | 14.83 |





Advanced Planning | Process Control | Quality Issue Feedback |
·Multi-functional project team ·Build up standard tree,do the analysis and training ·DFMEA ·4 stage project review, quality gate ·PFMEA ·Visualized WI | ·First and final piece100% inspection. ·Combine self-inspect and patrol inspect. ·Regular inspection on fixture and gauges. ·Upper andlower process error prevention control ·5M1E management | ·Quick feedback, arrive sitewithin 10 minutes ·Define interim and containment action within 4hours ·Daily quick response meeting ·8D ·6 Sigma ·Actions follow-upvalidation ·Share to similarproducts ·Record into failure mode database |
Q1: Are you a manufacturer?
Yes, we have been in manufacturing and providing excellent linear motion partsfor customers more than 20years.
Q2: How long could you prepare samples?
Ans:Normally 1days if we have the sample onhand.lf customized one. about a week around.
Q3: How about batch order production?
Ans: Normally 30days or so for one container
Q4: Do you inspect the finished products?
Ans:Yes, we will do inspection according to lsO standard and ruled by our QCstaff.
Q5: How do you ship the goods?
Ans: By sea, by air by truck or by courier(UPSDHLFedexTNT etc.)
Q6: What advantage do you have?
Ans:1.We have professional engineers,customers can expect the best possibleadvice and support.
4.Documents support on products, we have strong technical data sheet tosupport our products, which could make you easier to know our products.