Hex Flange Wing Tek Screws — Self-Drilling for Wood to Metal | Fasto

Hex flange head self-drilling screws with wings — commonly known as wing tek screws, sandwich panel screws, or timber-to-metal tek screws — are engineered fasteners for wood-to-metal and panel-to-steel connections. Manufactured to DIN 7504 K and compatible with Korean KS B 1033 standards, these screws feature a hexagonal flange head with an integral EPDM sealing washer, twin breakaway wings that ream clearance through wood without jacking, and a hardened drill point (grades #1–#5) that pierces steel substrates from 0.7 mm to 6.0 mm without pre-drilling. Widely deployed across Korea for 샌드위치 판넬 (sandwich panel) construction, 금속 지붕 공사 (metal roofing), 창고 건축 (warehouse construction), and 컨테이너 바닥재 (container flooring), Fasto wing teks deliver structural reliability in environments ranging from coastal Busan to sub-zero Gangwon winters.

Product details:

 Hex flange head self-drilling screws with wings sizes:

Compliant with DIN 7504 K · KS B 1033 Reference · All dimensions in millimeters

 Hex flange head self-drilling screws with wings applications:

Sandwich Panel Installation — EPS / PU / Mineral Wool;Wings Pre-Ream Insulation Layer · EPDM Washer Seals Panel Surface

Metal Roof Fastening — Steel Purlins 1.5–6.0 mm;Drill Point #3–#4 · Coastal-Grade Corrosion Protection (C4–C5)

Timber-to-Steel Connections — Container Floors, Mezzanines;Zero Wood Splitting · Wings Clearance Eliminates Jacking Gap

Hex flange head self-drilling screws with wings inspirations:

Why choose Fasto?

Engineering Wing Teks for the Demands of Korean Construction.
Korean construction projects — from Busan logistics centers to Gangwon mountain resorts — demand fasteners that perform across extreme temperature swings, corrosive coastal air, and the aggressive installation speeds of large-scale panel construction. Fasto wing tek screws are engineered from the ground up for this environment. Our dual-wing geometry is cold-formed with a precisely calculated shear plane that reams a clean clearance hole through wood and insulation before breaking away cleanly at the steel surface — eliminating the wood-jacking gap that cheap wing teks are notorious for. Our in-house drill point grinding center maintains a ±0.03 mm geometry tolerance on every single screw tip, ensuring consistent penetration across thousands of installations per project. With IATF 16949 certified production, full heat-number traceability, and per-batch ASTM B117 salt spray certification, Fasto delivers the kind of quality Korean contractors and panel system specifiers build their reputation on.
The Single-Source Partner Korean Distributors Trust.
As a 20-year fastener manufacturer with deep experience in the Asia-Pacific market, Fasto understands that Korean distributors need more than just screws — they need reliability, compliance, and speed. Our wing teks are fully compliant with DIN 7504 K and cross-reference to KS B 1033 mechanical property requirements. We offer 410 and 316 stainless steel grades for coastal and marine projects, alongside Ruspert and Geom coating systems rated to 1,500+ hours salt spray. Packaging is configured for the Korean distribution chain: standard carton counts (500/1,000/2,000 pcs), Korean-language label capability, and mixed-container consolidation for multi-SKU orders. With 25,000 tons of annual output and dedicated Asia-Pacific logistics lanes, Fasto delivers engineering-grade wing teks at competitive landed costs — backed by IATF 16949, ISO 9001, CE, and SGS certifications.

FAQ:

Q1: What is the difference between wing tek screws and standard self-drilling screws?
Standard self-drilling screws are designed for metal-to-metal connections and do not have wings. Wing tek screws include a pair of breakaway wings positioned above the drill point that ream a wider clearance hole through the wood or insulation layer before the wings shear off at the metal surface. This dual-diameter action solves the "wood jacking" problem — where wood lifts away from the metal substrate because the screw thread grips and pushes it upward. If you are fastening wood to steel, sandwich panels, or container flooring, you need wing teks. If you are fastening metal to metal only, use standard self-drilling screws.
🔍 육각 플랜지 날개 달린 드릴 나사와 일반 텍스 나사의 차이점은 무엇인가요?
Q2: How do I choose the correct screw length for Korean sandwich panel installation?
The screw must be long enough for the drill point and thread section to fully penetrate the steel purlin (typically 1.5–4.5 mm) while the wing section clears the panel thickness (EPS, PU, or mineral wool — commonly 50 mm, 75 mm, 100 mm, 150 mm in Korea). Rule of thumb: screw length = panel thickness + purlin thickness + 15 mm minimum projection. Example: 100 mm EPS panel on 3.2 mm steel purlin → use 125 mm length wing tek. Our engineer will provide a panel-thickness-to-screw-length lookup table with your quotation.
🔍 샌드위치 판넬 시공 시 날개 드릴 나사 길이는 어떻게 선택하나요?
Q3: How do Fasto wing teks prevent wood splitting and jacking?
Two mechanisms work together: (1) the twin wings ream a clearance hole in the wood that matches the thread major diameter, so the thread passes through without expanding the wood fibers; (2) the wings shear off at the metal surface, leaving a tight wood-to-metal interface with zero gap. Additionally, the drill point starts a clean pilot in the steel before the thread engages, eliminating the radial force that causes splitting at board edges. No pre-drilling required.
🔍 셀프 드릴 나사로 목재 고정할 때 나무가 갈라지는 것을 방지하는 방법은?
Q4: What material and coating should I use for coastal construction in Korea (Busan, Incheon, Ulsan)?
For Korean coastal environments with salt-laden air, we recommend upgrading from standard zinc-plated carbon steel to either 410 stainless steel with Ruspert coating (C4 corrosion class, 1,500h salt spray) for most marine-proximate projects, or 316 stainless steel (C5 corrosion class) for direct seafront structures, port facilities, and offshore aquaculture buildings. EPDM washers are standard on all variants and are ozone-resistant for long-term UV exposure. Do not use standard zinc-plated carbon steel within 5 km of the Korean coastline — expect rust within 12–18 months.
🔍 해안 지역 건축에 사용할 드릴 나사 재질 추천해 주세요.
Q5: Why do some wing tek screw hex heads strip or round out during installation?
Hex head stripping usually has two causes: (1) using a worn or incorrectly sized hex socket — for Fasto #12-14 and #14-10 screws you must use a 10 mm hex driver, not an adjustable wrench or Phillips bit; (2) the screw head was not induction-hardened to sufficient depth. Fasto wing teks feature a deep induction-hardened hex flange (HRC 50–55) that withstands installation torque far beyond the screw's torsional failure point — meaning the shank will twist off before the head rounds out. For very high-torque installation into thick steel (>4.5 mm), we recommend a torque-controlled driver set to 80% of the screw's rated torsional strength.

🔍육각 플랜지 드릴 나사 머리가 마모되거나 뭉개지는 이유는?