Chipboard Screws

Size : M6~12 (80~1000mm)

Chipboard Screws ▼
Chipboard screws are widely used in wooden constructions. Type-17 slot is optimized to maximize drilling efficiency. The addition of serration also greatly reduces the friction of penetration.

Head Types

Double Flat Head

Double Flat Head
The most common type of head with torx recess for optimal drill in performance. Works together with conical washers.

Wafer Head

Wafer Head
Designed to work with the same performance as double flat head with conical washers.

Hex Washer Head

Hex Washer Head
Hex Head

Washer Types

Conical Washer

Conical Washer
Size: M6 / M8 / M10

Thread Types

Serration

Serration

Drill Point Types

Bending Angle

Bending Angle
Max. 90º bending angle can be achieved

Type-17 Slot

Type-17 Slot

Self-Drilling Screws

Size : M7.0/6.3 (80~400mm)
M6.3/5.5 (80~400mm)
M4.8 (80~300mm)

Self-Drilling Screws ▼
Self-drilling screw are widely applied in rooftop installations.
Different drill points are optimized for drilling different steel thickness.
Long Hwa produces self-drilling screws form #1 drill point up to #7 drill point!

Head Types

Hex Washer Head

Hex Washer Head
A common design in roofing screws. Usually assembled with EPDM bonded washers.

Flat Head

Flat Head
Works good with painted walls with wide range of color selection of paint on the head of the screw.

Bugle Head

Bugle Head
Used also in rooftop installation

Washer Types

EPDM Washer

EPDM Washer
Conductive or non-conductive.

BAZ Washer

BAZ Washer

Thread Types

Addition of Wings is Possible

Addition of Wings is Possible
‧Shank Slot
‧Wings
‧1 or 3 Cuttings on the Thread

Drill Point Types

Driiling Point

Driiling Point
from #1 to #7

Concrete Screws

Size : M7.5 (42~402mm)

Concrete Screws ▼
Long Hwa produces concrete screws of different designs. We produce a variety of thread types. In addition, we also produce concrete drill points such as diamond point and spoon point.

Head Types

Cylinder Head

Cylinder Head

Flat Head

Flat Head

Pan Head

Pan Head
Hex Flange Head

Thread Types

High-low Thread

‧High-low Thread
‧Double Thread
‧1 or 3 Cuttings on the Thread

Drill Point Types

Spoon Point

‧Spoon Point
‧Sharp Point
‧Diamond Point

Distance Screws

Size : M6 (50~160mm)

Distance Screws ▼
There are two types of distance screws available for customer’s choice: distance screw with ribs under head or with spinnable rib piece.
We also welcome customer designs!

Head Types

Distance Screw with

Distance Screw with
Ribs Under Head

Distance Screw with

Distance Screw with
Spinnable Rib Piece

Drill Point Types

Sharp Point

‧Sharp Point
‧Type-17 Slot

Special Screws

Longhwa Produces various types of screws according to customer demand.
We are highly specialized in developing new models for customers.

Long Hwa Screw Works Co., Ltd.

Long Hwa Screw Works Co., Ltd.

  • No.9, 1st street, Industrial Area, Putz, Chia Yi County, Taiwan. R.O.C.
  • Tel: +886-5-369-5596-7
  • Fax: +886-5-369-5598
Long Hwa Screw Works Co., Ltd. CE Certificate 14566 ISO 9001 Long Hwa Screw Works Co., Ltd. CE Certificate 14592 ISO 14001
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