Zinc Plated Carbon Steel Hex Drive Flat Head Bolts Steel Machine Screws

Carbon Steel Hex Drive Flat Head Machine Screw

Product Description

Countersunk head screws are used in the need to install, the surface of the parts can't be raised, and there were two kinds of thickness of the fastening parts, so-called thick, that is to say by fastening parts thickness is greater than the countersunk head screw head thickness, bolt tightening, there are some of the screw thread into the threaded hole does not.In this case, the countersunk head screw must be tightened.Usually there is a kind of situation, is the fastening parts thickness is less than the height of the countersunk head screw head, this is common in sheet metal parts in the mechanical equipment, such as chassis hinges and door and casing coupling;The sheet metal cover of the equipment and the connection of equipment and so on.

Due to the smaller the thickness of the parts by the fastening of the sheet metal parts, screw hole completely into a tapered hole, in this case, when the countersunk head screw is tightened, the screw head is not cone clamping sheet metal parts, but the screw head root ministry with threaded hole at the top of the crushed to death, although feel screw is tightened up, but the metal sheet is stuck, not pressure, in this case, although feel a screw, but also did not be tightened.This is a very common situation.

Company Introduction

Ningbo Oukailuo Hardware Co., Ltd was founded in 1999,has been a leading manufacture and supplier of fasteners with a history of product and service over 19 years.This commitment has not wavered because complete customer satisfaction is always our No.1 priority.We persist in the principle of “Quality and integrity is the lifeline of an enterprise's subsistence and development” and do our best to provide you with best fasteners ,most favorable price,fastest delivery and best services.We sincerely hope to be your reliable supplier and partner.

FAQ

Q: How about your delivery time?

A: General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.

Q: What is your terms of payment ?

A: We can accept T/T,L/C for general order ,Paypal and Western union for small order or samples order.

Q: What is your packing?

A: Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer’s logo on the cartons. Or we customized cartons according to customers’ requests.

Q: Can we print our own logo?

A: Yes,we can make it according to your request.

Q: Can I get discounts?

A: Yes,for big order,old customer and frequent customers,we give reasonable discounts.

Q: How many screws can you produce per day?

A: We can produce nearly 50000 to 100000 pcs a day.

Q: Are you trading company or manufacturer ?

A: We are a professional manufacturer specialized in fasteners for more than 15 years.

If you are interested in machine screw, Please do not hesitate to email us or call us. Our professional team will assit you to purchased the quality products.

Ningbo Oukailuo Hardware Co., Ltd. was founded in 1999 and is a leading fastener manufacturer. Company passed ISO9001:2015 quality management system certification, and has ROHS, SGS certificate. Our main export markets are North America, Europe, Oceania, Korea, etc.

We have our own heat treatment shop, electroplating shop, Ruspert workshop. The heat treatment process is very important for product hardness, and our technology can ensure it. Electroplating includes galvanization, yellow zinc, black zinc, and green zinc. All galvanization meets ROHS. Salt spray time can be up to 96 hours. Ruspert can do most of the colors. The salt spray time can be 500 hours and 1000 hours.

OuKaiLuo have over 19 years experience inventory management, managing a growing number of customer production lines on-site to ensure ‘just-in-time’ delivery. We offer many variations of Direct Line Feed management to suit individual needs.