Specifications & Screw Finishes

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)

Large Size

One-Piece Forming Large Size Special Spec Screws, Bolts and Fasteners.

Length Max: 450mm

Head outer diameter max: 50mm

Thread outer diameter max: 28mm

Micro Screw

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

Head Type

Wood
Wood
Wood
Wood
Flat

Flat

Oval

Oval

Brazier

Brazier

Truss

Truss

Binding

Binding

Pan(JIS)

Pan(JIS)

Pan(ANSI)

Pan(ANSI)

Round

Round

Button

Button

PF.

PF.

Cheese

Cheese

Fillister

Fillister

Pan Washer

Pan
Washer

Indented Hexagon Washer

Indented
Hexagon
Washer

Driver Type

Phillips

Phillips

Slotted

Slotted

Phillips Slot.

Phillips Slot.

6-Lobe

6-Lobe

6-Lobe Tamper

6-Lobe Tamper

6-Lobe / Slot.

6-Lobe / Slot.

6-Lobe Plus

6-Lobe Plus

Pozidriv

Pozidriv

Pozidriv Round Hole

Pozidriv Round Hole

Square

Square

Square / Slot.

Square / Slot.

Phillips / Square

Phillips / Square

Triangle

Triangle

Special Recesses

Special Recesses

Y-Type

Y-Type

Tri-Wing

Tri-Wing

5-Lobe

5-Lobe

H-Type

H-Type

Hexagon

Hexagon

5-Point

5-Point

S-Type

S-Type

8-Point

8-Point

Spline

Spline

Spanner

Spanner

Clutch

Clutch

Phillips / Slot.Ind.

Phillips / Slot.Ind.

Slot.Ind.

Slot.Ind.

6-Lobe.Ind.

6-Lobe.Ind.

Thread Type

Machine Thread

Machine Thread

Machine Thread

Trilobular Machine Thread

Trilobular Machine Thread

Type 23 Machine Thread

Type 23 Machine Thread

Type 1 Machine Thread

Type 1 Machine Thread

Type F Machine Thread

Type F Machine Thread

Type C Machine Thread

Type C Machine Thread

Metal Sheet / Wood Thread.

Type A Metal Sheet Thread

Type A Metal Sheet Thread

Type AB Metal Sheet Thread

Type AB Metal Sheet Thread

Type B Metal Sheet Thread

Type B Metal Sheet Thread

Type 25 Metal Sheet Thread for B thread

Type 25 Metal Sheet Thread for B thread

Type HILO Metal Sheet Thread

Type HILO Metal Sheet Thread

Plastic Thread

Plastic Thread

Type PLAST Metal Sheet Thread

Type PLAST Metal Sheet Thread

Type TEK 2 Self Drilling Screw

Type TEK 2 Self Drilling Screw

Type 17 for sharp end

Type 17 for sharp end

Point Type

Die Point

Die Point

Dog Point

Dog Point

Rolled Point

Rolled Point

Pinch Point

Pinch Point

Nail Point

Nail Point

Cupped Point

Cupped Point

Round Point

Round Point

Cone Point

Cone Point

Type-A Point

Type-A Point

Type-B Point

Type-B Point

Type AB Point

Type AB Point

Type-C Point

Type-C Point

Type-U Point

Type-U Point

Type-F Point

Type-F Point

Type-FZ Point

Type-FZ Point

Type 1 Point

Type 1 Point

Type 17 Point

Type 17 Point

Type 23 Point

Type 23 Point

Type 25 Point

Type 25 Point

Self Drilling

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

Zinc

Zinc Nickel Alloy

Yellow Zinc

Yellow Zinc

Black Zinc

6-Lobe

Ruspert Sliver

Ruspert Sliver

Ruspert Silver

Ruspert Silver

Powder Coating

Powder Coating

Thread Lock

Thread Lock

Nickel

Nickel

Black Oxide

Black Oxide

Annodized

Annodized

Structural Strength

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.

Corrosion Resistance

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.

ISO9223 Atmospheric Corrosive Environment Analysis
Guaranteed Durability
ISO C1~2 Level Very low and low corrosive environment
Over 45 Years
ISO C3 Level Moderately corrosive environment
About 45 Years
ISO C4 Level Highly corrosive environment
About 35 Years
ISO C5 Level Very highly corrosive environment
15-20 Years
ISO CX Level Extremely highly corrosive environments
15-20 Years

Performance Advantages

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

FAQ

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.

View our products

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.

Request a sample

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.

Send us your design

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.

inquire now