If you are involved in electronic-related work - such as installing circuit boards or assembling computer cases - these small round-head bolts (with specifications ranging from M2 to M4) are very practical. They are nickel-plated, which helps improve conductivity and keeps their appearance neat.
We offer global delivery via DHL or FedEx, and it usually takes 3 to 5 days to arrive. The shipping fee starts at $6, but free delivery is available for orders over $150. If you order 200 bolts or more, you will also enjoy an 8% discount.
These Precision Forged Round Head Bolts are packed in anti-static bags to prevent any electrical damage, and they are placed in sturdy plastic boxes to prevent being crushed. We will inspect each batch of products to ensure the dimensions are accurate and conduct tests to ensure they do not contain harmful substances. Before shipment, they will also undergo electrical safety checks, and we will attach CE and UL certifications to let you know they are safe and usable.
Precision Forged Round Head Bolts are highly suitable for use in agricultural equipment - such as for fixing the blades of harvesters or assembling the frames of tractors. Made of strong steel, it can withstand vibration and is not easily deformed. The round head design also helps to avoid entanglement or damage to crops.
We provide land transportation services for local farms, usually taking 5 to 7 days, with costs ranging from $7 to $20. International orders typically take about 8 to 12 days. If you order more than 2000 bolts, you will enjoy a 25% discount on shipping costs.
We pack the bolts in thick cardboard boxes with reinforced metal edges to ensure their protection. Each bolt is coated with anti-rust oil to maintain good condition in humid environments.
We also conduct tests on their impact resistance and hardness to ensure they are sufficiently sturdy. Every bolt is individually inspected before shipment and is ISO 12944 certified – meaning it has passed standard testing and proven to be resistant to corrosion.
| Mon | #10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 |
| P | 24|32 |
20|28|32 |
18|24|32 |
16|24|32 |
14|20|28 | 13|20|28 |
| ds max | 0.199 | 0.26 | 0.324 | 0.388 | 0.452 | 0.515 |
| ds min | 0.182 | 0.237 | 0.298 | 0.36 | 0.421 | 0.483 |
| dk max | 0.656 | 0.844 | 1.031 | 1.219 | 1.406 | 1.594 |
| dk min | 0.625 | 0.813 | 1 | 1.188 | 1.375 | 1.563 |
| k max | 0.114 | 0.145 | 0.176 | 0.208 | 0.239 | 0.27 |
| k min | 0.094 | 0.125 | 0.156 | 0.188 | 0.219 | 0.25 |
| s max | 0.199 | 0.26 | 0.324 | 0.388 | 0.452 | 0.515 |
| s min | 0.185 | 0.245 | 0.307 | 0.368 | 0.431 | 0.492 |
| k1 max | 0.125 | 0.156 | 0.187 | 0.219 | 0.25 | 0.281 |
| k1 min | 0.094 | 0.125 | 0.156 | 0.188 | 0.219 | 0.25 |
| r max | 0.031 |
0.031 |
0.031 |
0.031 |
0.031 |
0.031 |
We offer Precision Forged Round Head Bolts, with sizes ranging from metric (from M3 to M30) to imperial (such as 1/4 inch to 1 inch). The default length range of the product is 10 mm to 200 mm, and we also accept your personalized length customization requirements.
These lines can be made thicker or thinner if desired. We will strictly control the manufacturing dimensions of each bolt to ensure that it can perfectly fit with the standard specifications of nuts and washers. All our bolts undergo quality checks to maintain consistency, whether you are using them in machinery or on construction sites.