Common international standard specifications for Screws:
DIN, ISO, JIS, BSW, IFI (Industrial Fasteners Institute) and UTS (Unified Thread Standard, The UTS is currently controlled by ASME/ANSI in the United States)
One-Piece Forming Large Size Special Spec Screws, Bolts and Fasteners.
Length Max: 450mm
Head outer diameter max: 50mm
Thread outer diameter max: 28mm
Precision Manufacturing – A perfect solution for every small application
Size Range: M0.6 - M2.0
Thread Length: 0.8 - 16.0mm
Head Type: Available in any head style
Flat
Oval
Brazier
Truss
Binding
Pan(JIS)
Pan(ANSI)
Round
Button
PF.
Cheese
Fillister
Pan
Washer
Indented
Hexagon
Washer
Phillips
Slotted
Phillips Slot.
6-Lobe
6-Lobe Tamper
6-Lobe / Slot.
6-Lobe Plus
Pozidriv
Pozidriv Round Hole
Square
Square / Slot.
Phillips / Square
Triangle
Special Recesses
Y-Type
Tri-Wing
5-Lobe
H-Type
Hexagon
5-Point
S-Type
8-Point
Spline
Spanner
Clutch
Phillips / Slot.Ind.
Slot.Ind.
6-Lobe.Ind.
Machine Thread
Trilobular Machine Thread
Type 23 Machine Thread
Type 1 Machine Thread
Type F Machine Thread
Type C Machine Thread
Type A Metal Sheet Thread
Type AB Metal Sheet Thread
Type B Metal Sheet Thread
Type 25 Metal Sheet Thread for B thread
Type HILO Metal Sheet Thread
Plastic Thread
Type PLAST Metal Sheet Thread
Type TEK 2 Self Drilling Screw
Type 17 for sharp end
Die Point
Dog Point
Rolled Point
Pinch Point
Nail Point
Cupped Point
Round Point
Cone Point
Type-A Point
Type-B Point
Type AB Point
Type-C Point
Type-U Point
Type-F Point
Type-FZ Point
Type 1 Point
Type 17 Point
Type 23 Point
Type 25 Point
Self Drilling
Choose based on the product’s intended use, application method, and customer requirements.
Choose based on the product’s intended use, application method, and customer requirements.
Zinc
Zinc Nickel Alloy
Yellow Zinc
6-Lobe
Ruspert Sliver
Ruspert Silver
Powder Coating
Thread Lock
Nickel
Black Oxide
Annodized
The zinc-tin alloy coating is an anti-rust and corrosion-resistant composite coating that is dense and can be tightly fused with the screw material to ensure that the anti-rust and corrosion-resistant duality layer will not peel off.
Even if subjected to external friction or damage, the zinc-tin alloy anti-rust and corrosion-resistant composite coating will not peel off which can sustain excellent corrosion and impact resistance.
The zinc-tin alloy composite coating has excellent compatibility with frames or support frames made of magnesium-aluminum-zinc or hot-dip galvanized steel, which will not cause “galvanic corrosion” and damage the material structure of the building. Even if exposed to an atmosphere containing corrosive sulfur dioxide, it can effectively ensure the safety and service life of the building.
The anti-rust and high corrosion resistance of zinc-tin alloy composite coating is superior to other coatings and can replace the application of general mechanical galvanized or stainless-steel fasteners in high-corrosion outdoor environments.
| Type of Bolt Compare Items | CH's High-Corrosion-Resistant & High-Strength Bolt Set (8.8 grade) | SUS304 Stainless Steel Bolt Set (A2-70) | SUS316 Stainless Steel Bolt Set (A4-70) |
| Stress Limit for Permanent Deformation (Yield Strength, MPa) | >640 | >450 | >450 |
| Tensile Strength (MPa) | >800 | >700 | >700 |
| Structural Strength | Higher | Lower | Lower |
| Rust Resistance | Excellent | Good | Good |
| Elemental Constraints | None | Coastal Area | None |
| Galvanic corrosion risk between dissimilar metal jointing | No | Yes | Yes |
Construction screws obtained EU ETA Certificate
These are some of the most frequently asked questions by our customers. We hope they are helpful to you. If you cannot find the answer you need, please contact us using the inquiry button below.
We are a professional precision screw manufacturer operating directly. We also represent various fastener products from Taiwan, forming a comprehensive supply chain to ensure quality. We welcome your inquiries.
Our product range includes screws, bolts, nuts, precision small screws, SEMS screws, washers, rivets, CNC precision machining, metal stamped parts, and a variety of custom fasteners.
The delivery time largely depends on the quantity of the order. We have some standard specification products in stock, while custom products typically take between 30 to 75 days for delivery.
Yes, we can provide samples upon request. However, due to the vast array of screw specifications, we might not have the exact specifications you need in stock. In that case, we will send you products with similar specifications for your reference.
If you require a customized product, we will produce a small batch of samples for your approval after you place your order. Once you confirm the samples, we will proceed with mass production.
Customization is our forte. You can provide us with diagrams, design drawings, or a list of requirements, and our expert team will provide a quote based on your specifications.
Please provide the specifications and quantity of the screws you need. Specifications should include material, surface treatment, head type, driver type, thread type, point type, and dimensions (Metric, Imperial, US).
The MOQ varies depending on the material. As a professional screw manufacturer, our MOQ is 50,000 pieces for stainless steel and 100,000 pieces for carbon steel. This requirement, which may seem high to some customers, is designed to ensure product quality, cost-effectiveness, production efficiency, and shipping efficiency, and to pass on price benefits to customers. For special-purpose screws or orders with a high total quantity, we also support a lower MOQ, making cooperation very convenient.
Carbon steel screws will rust when exposed to moisture unless they are coated with an anti-rust coating or made of stainless steel. However, if the anti-rust coating is worn or chipped due to external factors, thereby reducing its anti-rust strength, rust may occur under the coating. Stainless steel screws are the most resistant to rust and corrosion. Although they are more expensive, their rust resistance is not easily reduced because the entire structure of the screw is stainless steel.
Our products are certified by ISO 9001, which is an international standard for quality management systems. This certification ensures that we adhere to best practices for producing high-quality products that meet our customers’ expectations and requirements.
Some of our products also have CE certification, which is a mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area. Please contact us for CE-certified products.
