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Better Fastener Industry Co., Ltd. is a China-based Drilling Screws manufacturer and consolidated fastener supplier. We started as a washer factory in 2001 and expanded into nuts, bolts and screws in 2010, so a drilling screw order ships together with the bonded sealing washers, hexagon nuts and cladding bolts that belong to the same fixing. Our programme covers self-drilling tapping screws to DIN 7504 and ISO 15481 plus thread-cutting screws to DIN 7513, produced in carbon steel with the point grades, head styles and corrosion finishes that metal roofing, cladding and light steel framing require.
The range serves steel roof and wall cladding, color steel panel installation, structural purlin connections and outdoor metal construction where a single-pass drill-and-thread operation removes the pre-drilling step from the installation cycle.
What Our Drilling Screws Range Covers
Each standard family differs in head geometry, drive recess and point configuration rather than in the basic working principle. We supply the following designations as standard production items, and hold the tooling to extend any of them into drawing-specific lengths and diameters.
| Standard | Product | Head and drive | Typical fixing situation |
|---|---|---|---|
| DIN 7504 (M):1995 | Pan head Phillips self-drilling tapping screw | Pan head, cross recess | General sheet metal panel and casing assembly |
| DIN 7504 (O):1995 | Countersunk head Phillips self-drilling tapping screw | Countersunk head, cross recess | Flush surfaces where the head must sit below the panel face |
| DIN 7504 (R):1995 | Oval countersunk head Phillips self-drilling tapping screw | Oval countersunk, cross recess | Panel laps and overlaps with a low-profile head |
| JIS B 1124:2021 | Oval countersunk head Phillips self-drilling tapping screw | Oval countersunk, Japanese standard | Japanese-specification cladding and equipment panels |
| DIN 7504 (L):1995 | Slotted self-drilling tapping screw | Slotted drive | Manual assembly, service panels and low-torque fixing points |
| DIN 7504 (K):1995 | Self-drilling tapping screw | Drill point, thread-forming shank | Mixed panel thicknesses, supplied to the project drawing |
| DIN 7513 (A):2016 | Hex head thread cutting screw | Hex head, thread-cutting body | Higher-torque fixing into heavier sections and structural connections |
Drill Point Grade and Substrate Matching
The fluted point removes material ahead of the thread so the thread never has to displace undrilled metal. Point geometry is graded from thin sheet through structural steel, and the grade together with screw length decides whether the fixing beds cleanly or strips the panel.
| Point grade | Substrate class | Where it fits | What we confirm |
|---|---|---|---|
| Type 1 | Thin-gauge sheet | Panel laps, liners, trim and flashing | Sheet thickness and minimum engagement length |
| Type 2 | Light to medium sheet | Wall cladding and facade panels | Full substrate stack and driver torque setting |
| Type 3 | Medium sheet | Metal-to-metal assembly, HVAC and equipment casings | Pilot-free penetration and thread engagement |
| Type 4 | Thick sheet | Heavier panel sections, brackets and secondary steel | Point length against section thickness |
| Type 5 | Structural steel sections | Purlin and structural steel connections | Section thickness, fixing pattern and drive torque |
Point grade and overall length are selected as one decision. A screw long enough for the supporting member with the wrong point grade will still stall or burn the point, and a correctly graded point on a screw that is too short leaves the thread working only in the outer skin.
Material, Coating and Sealing Choices
- Drilling screws are produced in carbon steel to DIN 7504 and ISO 15481 as the base specification.
- Our wider fastener production covers carbon steel, stainless steel and low-alloy steel, which keeps a mixed fastening schedule on consistent metallurgy and documentation.
- Post-treatment capability includes hot-dip galvanizing and blackening, covering exterior corrosion demand and dark architectural finishes.
- EPDM bonded washers are available for weathertight roof and facade fixings, with washer retention checked as part of final inspection.
- Drive recesses follow the supplied standard: cross recess, slotted and hex head across the families above.
Where Drilling Screws Fit in a Project
Steel roof and wall cladding systems are the primary application: side-lap and end-lap fixings through color steel panels into purlins, ridge and edge trim, flashings and rainwater goods. The same screws are used for structural purlin connections, light steel framing, ducting and equipment enclosures, and general outdoor metal construction where a single-pass fixing reduces tool changes and site time.
Because the point penetrates before the thread engages, layer separation and panel dimpling are avoided on multi-layer cladding build-ups. Fixings are normally paired with a bonded sealing washer on the weather face and scheduled together with the Bolts and Nuts that complete the structural connections on the same project.
Installation and Site Practice
- Use a torque-controlled driver with a depth stop; the drill-and-thread sequence is completed in one pass and does not require a pilot hole.
- Hold the tool square to the panel face. Angled entry deflects the point, enlarges the hole and can tear the sheet edge.
- Stop at washer contact. Over-driving compresses the EPDM washer past its working thickness and shortens the seal life.
- Position lap fixings clear of the panel rib so the point enters the flat of the supporting member.
- Check fastening intervals against the cladding manufacturer's fixing pattern and the local wind-load requirement.
Quality Control and Acceptance
We work to total quality management across the production sequence, with inspection after each process and 100% final inspection of finished goods against customer requirements and the applicable international standard. Our in-house laboratory is equipped with a spectrometer, CMM and X-ray flaw detector, covering chemical composition, mechanical properties, non-destructive testing and geometric dimension measurement.
Acceptance for a drilling screw order is normally agreed on dimensional tolerances to the named standard, drive and penetration behaviour on a panel sample, coating finish and washer retention, together with the inspection record format the project requires. Our quality system is certified to ISO 9001.
Packaging, Kitting and Delivery
- Bulk export cartons for production-line consumption, with quantity per box, batch marking and carton labelling to your warehouse format.
- Retail kits, blister packs and custom boxes for distributors selling through builders' merchant and trade channels.
- Washers supplied loose or pre-assembled to the screw, depending on the installation method on site.
- Consolidated loading with bolts, nuts and washers on a single shipment, with DDP delivery available to the consignee address.
Information We Use to Configure Your Solution
- Substrate: panel material, the full thickness stack, and the supporting member the thread must engage.
- Standard: the designation and edition required, such as DIN 7504 (M), (O), (R), (L), (K), JIS B 1124 or DIN 7513 (A).
- Geometry: nominal diameter, length range, thread pitch and any head or recess variant beyond the standard.
- Surface: coating type, colour and corrosion classification, plus whether a bonded sealing washer is fitted.
- Assembly: driver type, torque setting and the joint detail at the fixing point.
- Supply: packing configuration, box quantity, labelling and the delivery schedule the project follows.
Custom development is our core business: we produce to your drawings or samples, and our engineering team reviews the point geometry, thread form and material before releasing production tooling.
Frequently Asked Questions
Which drilling screw standards does Better Fastener produce?
We produce DIN 7504 (M) pan head, (O) countersunk head, (R) oval countersunk head, (L) slotted and (K) self-drilling tapping screws, the JIS B 1124:2021 oval countersunk head self-drilling tapping screw, and the DIN 7513 (A):2016 hex head thread cutting screw. Other diameters, lengths and head variants are produced to drawing.
How is the correct drill point grade chosen?
Point grade follows the thickness of the material the point must penetrate, from grade 1 for thin sheet through grade 5 for structural sections. We match the grade and screw length to your panel stack and supporting member so the thread engages in the load-bearing material rather than only the outer skin.
Do you supply EPDM bonded washers with drilling screws?
Yes. Bonded EPDM washers are available for weathertight roof and facade applications, supplied loose or pre-assembled to the screw. Washer retention and seating are checked during final inspection.
Can you manufacture drilling screws to our drawing or sample?
Custom production is our core business. Send the drawing or a physical sample with the substrate details and we will confirm material, point geometry, thread form and surface treatment before production tooling is released.
What production capacity supports a large cladding programme?
We operate 12 modern production lines, including a fully automatic shell molding line and four heat treatment lines, with annual output above 20,000 tons and more than 100 employees, of whom over 10 are engineers. That scale supports volume cladding schedules and smaller distributor batches on the same quality system.
Can drilling screws ship together with bolts, nuts and washers?
Yes. As a consolidated fastener enterprise we combine Bolts, Nuts and washers with the drilling screw order in one packing and shipping programme, including retail-ready kits and DDP delivery.
