Eliminate splitting, stripping, and rework. Our M6 countersunk bolt 80mm and M6 countersunk bolt 100mm are engineered for dense hardwood, softwood, and engineered timber — with full traceability, ISO 9001 certification, and direct factory pricing.
Share:
Eliminate splitting, stripping, and rework. Our M6 countersunk bolt 80mm and M6 countersunk bolt 100mm are engineered for dense hardwood, softwood, and engineered timber — with full traceability, ISO 9001 certification, and direct factory pricing.
✅ 26 years of precision manufacturing · 120+ CNC machines · 3,000+ global clients
Procurement managers and technical directors report recurring issues with generic countersunk bolts. Here are the five most costly pain points we hear from our 3,000+ customers:
🔍 Our engineering team analyzed 1,200+ field failures — these six causes represent 89% of all M6 wood bolt complaints.
Engineered from Grade 8.8 carbon steel or 304/316 stainless steel with a 90° flat head for flush seating. Each bolt is CNC-machined and batch-tested for hardness, tensile strength, and salt spray resistance.
| Parameter | M6 × 80mm | M6 × 100mm |
|---|---|---|
| Thread Diameter | M6 (6.0 mm) | M6 (6.0 mm) |
| Length (under head) | 80 mm ±0.5 mm | 100 mm ±0.5 mm |
| Head Diameter | 12.0 mm (flat 90°) | 12.0 mm (flat 90°) |
| Head Height | 2.8 mm | 2.8 mm |
| Thread Pitch | 1.0 mm (coarse) | 1.0 mm (coarse) |
| Drive Type | Phillips #2 / Hex 4mm | Phillips #2 / Hex 4mm |
| Material Grade | 8.8 / 304 / 316 | 8.8 / 304 / 316 |
| Surface Finish | Zinc plated (yellow/white), HDG, or plain | Zinc plated, HDG, or plain |
| Corrosion resistance (NSS) | ≥72 h (zinc) / ≥600 h (316) | ≥72 h / ≥600 h |
| Min. tensile strength | 800 MPa (8.8) / 520 MPa (304) | 800 MPa / 520 MPa |
| Packaging | 100 pcs/box, 1,000 pcs/carton | 100 pcs/box, 1,000 pcs/carton |
* Custom lengths (60–120 mm) and OEM marking available. Full certification batch traceable.
✅ 26 years of fastener manufacturing
✅ 30,000 m² production base
✅ 120+ CNC & automated forging machines
✅ 500,000+ pcs monthly capacity
✅ 15 in-house engineers (avg. 10 yrs exp.)
✅ ISO 9001, CE, RoHS, SGS reports
✅ 3,000+ global customers in 28 countries
📸 Real production line – CNC machining center
A UK contractor switched to our M6×80mm countersunk bolts and reported 22% fewer splits and 31% faster installation vs. generic screws.
A German modular home builder uses our M6×100mm bolts for structural beam connections. Zero failures in 14-month quality audit.
A Danish furniture manufacturer reduced rework by 27% after switching to our consistent-length M6 80mm bolts with anti-corrosion zinc plating.
📊 Data sourced from internal quality audits and customer feedback reports (2024–2025).
We serve leading OEMs, construction firms, and distributors across 28 countries. Here is a glimpse of our brand ecosystem:
+ 150+ Fortune Global 500 suppliers
CE · RoHS · SGS · FCC
📸 Handan Guanbiao – 30,000 m² smart manufacturing campus
Real feedback from procurement managers, technical directors, and operations leaders.
“We tested M6×100mm countersunk bolts from 4 suppliers. Guanbiao’s length tolerance was the tightest — ±0.3mm vs ±1.2mm from competitors. Our joinery team noticed immediately.”
“The M6 80mm bolts with zinc plating performed flawlessly in our outdoor decking line. Zero corrosion complaints after 10 months. Lead time was 11 days — half the industry average.”
“We switched to Guanbiao for our modular timber frames. The 8.8 grade steel gives us confidence in structural loads. 18% cost saving vs. our previous EU supplier.”
“Consistent quality across 3 shipments. The 316 stainless M6×80mm bolts are perfect for our coastal projects.”
“We needed 50,000 pcs M6×100mm for a hospitality project. They delivered in 18 days — impeccable.”
Our engineers and sales team provide instant technical support. Here are a few recent conversations:
📸 Direct client conversations – technical queries, orders, and quality confirmations.
Quick answers to the most common procurement and technical inquiries.
🔧 19 years in fastener R&D · 12 patents in threaded fasteners · Former consultant for SKF and Würth · ISO 9001 lead auditor.
“I’ve personally overseen the design and testing of over 400 fastener variants for wood, steel, and composite applications. The M6 countersunk line was developed to address the exact splitting and tolerance frustrations I saw in the field. Every batch is verified in our lab before shipping.”
Get free samples, a detailed spec sheet, and a competitive quote within 24 hours. No minimum commitment for first-time buyers.
📞 Call us: +86 15531020881 · ✉️ info@topfastener.com · 🌐 maxfastener.com
🔒 Privacy guaranteed · 100% spam-free · Your data is protected under our privacy policy.
Hit enter to search or ESC to close
