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Hex Self-drilling Screws With EPDM Washer Carbon Steel Hexagonal Self-tapping Screw Roof Screws
●Material: Carbon Steel
●Surface Treatment: Galvanized, Black Oxide, Hot Dip Galvanizing, Dacromet，Ruspert
●Size: 6#,7#,8#,10#,12#,14# / ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, ST6.3
●Length: 13-125MM
●Standard: DIN,ANSI,BSW,JIS,GB
Description
marker
Product Information
Self-drilling hex head screws have a hex head that can be driven by a socket or tool. These screws use its self-drilling (TEK) tip to tap their own holes in 20 to 14 gauge metals. Particularly in wood, their threads also enlarge the substance to improve retention. The larger the drill tip to pierce heavier gauge metals, the higher the TEK number. Depending on the screw size, the heads employ a 1/4, 5/16, or 3/8 hex nut driver. These screws are employed in outdoor environments.
One benefit of the unique procedure is the galvanized surface's great brightness and robust corrosion resistance.
Special process and characteristic advantages:
1. Galvanized surface , high brightness, strong corrosion resistance.
2. High surface toughness after carburize tempering.
3. High-performance locking with cutting-edge technology
Product Size of EPDM Washer Zinc Plated Din 7504 Hex Head Self Drilling Screws
| Nominal Diameter d |
ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| P | Thread Pitch | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a | Max | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| C | Min | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| dc | Max | 6.30 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| Min | 5.80 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | |
| e | Min | 4.28 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | Max | 2.80 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| Min | 2.50 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | |
| kw | Min | 1.3 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r1 | Min | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 |
| r2 | Max | 0.2 | 0.25 | 0.3 | 0.3 | 0.4 | 0.5 |
| s | Max | 4.00 | 5.5 | 7 | 8 | 8 | 10 |
| Min | 3.82 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | |
| Drilling Depth / Sheet Metal Thickness | ≥ | 0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
| 1.9 | 2.25 | 3 | 4.4 | 5.25 | 6 | ||
EPDM Washer Zinc Plated Din 7504 Hex Head Self Drilling Screws
Hex Head Self-Drilling Screws are suitable for fastening brackets, components, cladding, and steel sections to steel. The Self-Drilling point drills and threads without the need of a pilot hole, with a hex head for a quick and secure fasten into steel.
Company Information
Hebei Fujinrui Metal Products Co., Ltd. is an enterprise integrating fastener product production and metal surface treatment. It has multiple machining workshops and surface treatment workshops, with a workforce of more than 300 pcs employees, boasting a mature production scale and strong technical strength.
The company's can produce national standard self-drilling screws, national standard external hexagon bolts, socket head cap screws, nuts, flange bolts and nuts, national standard flat washers and spring washers, etc.and there are always bolts and self-drilling screws in stock, In addition, it undertakes external metal surface processing, adopting processes such as Dacromet, Geomet, Luxiubao, Magni, Ruspert, etc. The products processed can pass the neutral salt spray test for up to 2000 hours at the maximum, featuring excellent quality and enjoying high trust from customers.
We adhere to the corporate culture of "Quality First, Customer Supreme", always insisting on technological innovation and process optimization, and are committed to providing customers with high-quality fastener products. The company's products are sold both at home and abroad and have won widespread market recognition.
We meet with the key personnel who work for the workshop before production after the order is verified.
Check the craftsmanship and technological elements to ensure that everything is in order.
1. Upon arrival, check all the materials to make sure they meet the needs of the customers.
2. Examine the intermediate products.
3. Internet quality assurance
4. Control of final items' quality
5. Final inspection when the goods are being packed. If there are no other issues at this time,The inspection report and shipping release will be issued by our QC.
6. We take careful care of your items when they are being shipped. Boxes can endure common impacts during handling and shipping.
FAQ
Q: when can I get quotation sheet ?
A: Our sales team will make quotation within 24 hours,if you are hurry ,you can call us or contact us online,we will make quotation for you asap
Q: How can I get sample to check your quality?
A: We can offer sample for free,but usually freight is at customers side ,but the cost can be refund from bulk order payment
Q: Can we print our own logo ?
A: Yes, we have professional design team which service for you ,we can add your logo on your package
Q: How long is your delivery time?
A: Generally it is about 30 days accordng to your order qty of items
Q: You are a manufacturing company or trading company?
A: We are more than 20 years professional fasteners manufacturing and have exporting experience for more than 12 years.
Q: What is your payment term?
A: Generally, 30% T/T in advance ,balance before shippment
contact us
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