Payment & Shipping Terms:
|Standard:||JIS, DIN, ANSI, ISO,GB||Screw Type:||Wood Screw|
|Drive Type:||Torx/Square Drive||Package:||Small Boxes, Plastic Bags, Bulk In Cartons, Pallet|
|Material ::||Stainless 18-8, 304,. 316, A2||Finish:||Yellow Zinc Plated|
Hex Washer Head Yellow Zinc Screw with Type 17 Point Wood Screw
Early wood screws were made by hand, with a series of files, chisels, and other cutting tools, and these can be spotted easily by noting the irregular spacing and shape of the threads, as well as file marks remaining on the head of the screw and in the area between threads. Many of these screws had a blunt end, completely lacking the sharp tapered point on nearly all modern wood screws.Eventually, lathes were used to manufacture wood screws, with the earliest patent being recorded in 1760 in England.During the 1850s swaging tools were developed to provide a more uniform and consistent thread. Screws made with these tools have rounded valleys with sharp and rough threads. Some wood screws were made with cutting dies as early as the late 1700s (possibly even before 1678 when the book content was first published in parts)
Once screw turning machines were in common use, most commercially available wood screws were produced with this method. These cut wood screws are almost invariably tapered, and even when the tapered shank is not obvious, they can be discerned because the threads do not extend past the diameter of the shank. Such screws are best installed after drilling a pilot hole with a tapered drill bit. The majority of modern wood screws, except for those made of brass, are formed on thread rolling machines. These screws have a constant diameter, threads with a larger diameter than the shank, and are stronger because the rolling process does not cut the grain of the metal.
Item Name: Hex Washer Head Yellow Zinc Screw with Type 17 Point Wood Screw
Brand name: OuKaiLuo or customized
Main Standard: DIN7976/ din7971/ DIN7972/ DIN7973/ DIN7981/ DIN7982/ DIN7983/ ISO1479/ ISO1481/ ISO1482/ ISO1483/ ISO7049/ ISO7050/ ISO7051/ AMSE B18.6.4
Material: Stainless Steel/ Alloy Steel
Surface: Black oxide (black), phosphate (gray), zinc plated (Yellow/Silver) and dacromet (Sliver)
Standard: DIN7982 screw/ISO/GB/ANSI/BS
Packing: Small box /plastic bag (GW: 20~25 KGS.), Outer packing: standard neutral carton box or according to customer’s requirements
Delivery time: 35 days after the order confirmation
Payment term: T/T, L/C, Western Union, Paypal
Business type: Manufacturer
Certifications: ISO9001,CE, SGS, API
Advantages: 1. Competitive price; 2. OEM service available
Notes: Special specifications and marks can be made according to customers requirements;
Main products: screws, bolts, nuts.
please help us to know, as below:
|1. Size drawing ( if you have no drawing, please tell us your products detail size and send us your picture.)|
|2. Material (Aluminum, copper, brass, stainless steel, steel, iron, alloy, zinc etc.)|
|3. Quantity (If your quantity reach our MOQ the price will be better)|
|4. Surface treatment (Polishing; Anodize; Nickel, Zinc, Tin, chrome ,Silver plating etc.)|
|6. Packing Term|
Raw Material — Lathe — Processing — Cleaning — Test — Packing — Delivery
After-sale Service High Precision Eccentric Nuts/Stainless Steel Eccentric Nuts
Warm and quick response service provided by the professional Export Sales Team with many years' experience in handling exports to the US, Europe, Japan and other countries and regions.
1.OEM Accepted : We can produce any of your design.
2.Good Service : We treat clients as friend.
3.Good Quality :We have strict quality control system .Good reputation in the market.
4.Fast & Cheap Delivery: We have big discount from forwarder (Long Contract).
· 1. Well trained and experienced staffs at your service.
· 2. Short lead time.
· 3. International standard matched
· 4. Non-standard / standard / OEM / ODM / customized service provided.
· 5. Designed in accordance with customers' request.
· 6. Packed and delivered by customers' requirement.
Q: Do you have in-house facility for planning, design& development on products?
A: Yes, we do. We have several skilled engineers who can offer a control planning with process tolerance and inspections after seeing the drawings.
Q: Could you issue the drawing?
A: Yes, we can issue the CAD, PDF, Solidwork drawing as per customer’s request or samples.
Q: How do you ensure the quality?
A: 100% inspection. We use the Height Gage, Coordinate Measuring Machine, Hardness Tester, Video Measuring Machine, Roughness Tester, Torsion Tester, Salt Spray Tester and so on to test our goods.
Q: How about your purchase & sourcing?
A: We have in-house facility for purchase & sourcing. We have a system for vendor approval process which can keep our list of approved vendors current.
Q: Could you pls tell me your manufacturing system?
A: Of course. We have adequate in-house production facilities, adequate machine condition/capability, adequate process reliability. Our preventive equipment maintenance system also makes effort to manufacturing.
Q: Does your company have a quality manual? Will your company share production techniques and processes for the purpose of developing a comprehensive quality?
A: Yes, we can provide our customers with a quality mannal or PPAP Files if required. We're willing to share the techniques and process with our customers in order to achieve the products.
Any more questions or demands, pls feel free to contact us!