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90° Flush Countersink | Clean Professional Finish | High Bearing Surface
The Flat Head Bolt (countersunk head bolt) is the solution of choice when a perfectly flush, professional finish is required.The 90° countersunk head seats flush into a matching countersink, eliminating protruding heads and snagging points while providing a clean appearance for panels, frames, and visible assemblies.Available in multiple drives, materials, and strength classes, our flat head bolts are manufactured to DIN and ISO standards for reliable, repeatable performance.
90° Countersunk Head:
· The precision-formed 90° head angle sits flush with the surface for a smooth, obstruction-free finish.
Flush Installation:
· Eliminates protruding heads, ideal for sliding surfaces, safety guards, and design-sensitive assemblies.
Multiple Drive Options:
· Available with hex socket, Phillips, or Torx drives to match your assembly tools.
High Bearing Surface:
· The wide conical head distributes clamping load effectively into the countersink.
Material & Coating Options:
· Carbon steel with zinc/black finishes, or stainless steel for corrosion-resistant service.
| Parameter | Details |
| Standard | DIN 7991 / ISO 10642 / ANSI B18.6.7M |
| Material | Carbon Steel (8.8/10.9/12.9), Stainless Steel |
| Head Angle | 90° countersunk |
| Drive Types | Hex Socket (Allen), Phillips, Torx, Slotted |
| Diameter Range | M3 to M20 |
| Length Range | 6mm to 150mm |
| Thread Type | Full or partial thread |
| Tensile Strength | 800 - 1,220 N/mm² (class dependent) |
Carbon Steel:
· Grades 8.8, 10.9, and 12.9 for structural and high-strength joints.
Stainless Steel:
· A2 (304) and A4 (316) for outdoor, marine, and food-grade applications.
Zinc Plating:
· Blue, white, or yellow zinc for general and industrial use.
Black Oxide:
· Low-reflection black finish ideal for optics, electronics, and architectural details.
Machine Guards:
1. Flush fastening of guards and enclosures to eliminate snagging hazards.
Electronic Enclosures:
2. Clean, flush mounting of panels and covers on control cabinets.
Aluminum Profiles:
3. Secure attachment of brackets and fittings to extruded sections.
Furniture & Fixtures:
4. Design-conscious fastening on visible furniture and retail displays.
Vehicle Interiors:
5. Flush trim and panel fastening inside cabins and trailers.
Architectural Fittings:
6. Clean fastening on handrails, balustrades, and stainless steel cladding.
| Feature | Customization Range |
| Drive Type | Hex socket, Torx, Phillips, or security drives to match tooling. |
| Head Angle | 82° or 100° angles available for non-standard countersinks. |
| Material Grade | Higher strength classes or stainless grades per application. |
| Coating | Zinc, black oxide, zinc-nickel, or Dacromet. |
| Dimensions | Custom lengths and diameters produced to drawing. |
Pyramid Hardware Fasteners is a premier ISO 9001:2015 and IATF 16949 certified manufacturer based in Egypt. With 15+ years of experience, we operate 50+ advanced cold-heading machines, specializing in both carbon and stainless steel fasteners. We export 70+ varieties of products to 30+ countries, maintaining a world-class 98.5% OTD rate. By manufacturing in Egypt, we leverage strategic trade agreements and efficient production to offer 15-30% savings compared to global competitors, while ensuring uncompromising quality through strict internal labs and external audits (SGS/BV/TÜV).
Main Export Ports:
· Alexandria Port, Port Said Port, and Damietta Port.
Incoterms:
· FOB, CIF, CFR, and DDU.
Lead Times:
· Samples in 10-15 days; Bulk orders in 35-45 working days.
MOQ:
· 5000-10000 pieces per size (custom items quoted individually).
Packaging:
· Standard 25kg bulk cartons, small boxes, or palletized for large industrial orders.
Q: Do I need a countersink bit for these bolts?
1. A: Yes, for a truly flush result the hole should be countersunk to the matching head angle (90°). We can supply countersink bits with your order.
Q: What is the difference between flat head and pan head bolts?
2. A: A flat head sits flush inside a countersink; a pan head sits on top of the surface with a domed profile and larger bearing area.
Q: Are these bolts suitable for outdoor use?
3. A: Yes, choose our stainless steel or zinc-nickel coated options for outdoor and coastal environments.
Q: What is the maximum strength grade available?
4. A: We supply flat head bolts up to 12.9 grade for high-strength structural applications.
Q: Can you supply black finish bolts for aesthetics?
5. A: Yes, black oxide and black phosphate finishes are available for low-reflection and decorative applications.
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