Single Slotted Tapered Countersunk Fasteners Full Dog Point

When designing assemblies that demand a clean, aerodynamic surface and precise alignment, engineers turn to single slotted tapered countersunk fasteners with full dog point. These fasteners, synonymous with terms like Slotted CS Head Machine Screws with Full Dog Point, incorporate a conical head that sits flush within a chamfered hole. The Straight Slot Countersunk Screws Full Dog Point Tip variant features a thin, straight slot that accepts common flathead screwdrivers, simplifying manual and automated driving. For projects requiring maximum insertion accuracy, the Slotted Conical Sink Head Screws with Complete Dog Point provides an extended cylindrical pilot that aligns perfectly with a pre-tapped hole, virtually eliminating cross-threading. The dimensions adhere to ISO 7045 for metric and ASME B18.6.3 for imperial sizes, with thread tolerances of 6g for metric or class 2A for unified threads. Available diameters span M2 to M10, and lengths from 4mm to 60mm, with dog point lengths dictated by ISO 4753. Manufactured from cold-headed steel or corrosion-resistant stainless steels, these fasteners are available with protective coatings such as zinc plate, black oxide, and passivation. Typical applications include automotive interior panels, electronic enclosures, aerospace composite structures, and precision machinery where a smooth finished surface is not only aesthetic but critical for safety and aerodynamics. The full dog point plays a pivotal role in high-speed assembly environments, allowing the screw to self-locate before thread engagement, which significantly reduces operator fatigue and tool wear. Furthermore, the tapered underhead angle—commonly 90 degrees—matches standard countersinks, ensuring a gapless transition between the fastener and the hosting material. The simple slotted drive is preferred when a low-profile head is required and when torque requirements are moderate, avoiding the complexity of hex or Phillips drives. It also enables easy cleaning in hygienic environments as there are no recess crevices. The full dog point, precision-ground to a slightly chamfered cylinder, pilots the screw accurately even in hard-to-reach locations, making it a favorite in aerospace and defense applications where FOD (foreign object debris) control is paramount.

The Single Slotted Tapered Countersunk Fasteners Full Dog Point undergoes a rigorous production process that starts with wire annealing and is followed by cold heading to form the head and dog point geometry. The slotted drive is precisely broached to maintain a clean slot floor, essential for repeatable torque transfer. Our in-house thread rolling ensures consistent pitch diameter and surface finish, which reduces friction scatter during installation. The full dog point is machined to a length and diameter that correspond to the root diameter of the thread, providing a lead-in that effortlessly finds the tapped hole. Once formed, the fasteners are heat-treated to achieve the desired mechanical properties: grade 8.8 fasteners are quenched and tempered to a surface hardness of HRC 22-32, while stainless steel parts are solution-annealed for maximum corrosion resistance. Electroplating for steel versions is conducted under strict bath monitoring to achieve a uniform thickness of 5-8 µm, and a post-plate hydrogen de-embrittlement bake is performed for high-strength items. Salt spray testing per ASTM B117 demonstrates over 72 hours to white rust for zinc-plated and trivalent passivated products. A2 stainless steel can withstand over 200 hours of neutral salt spray without red rust. The threaded portion can be supplied with a pre-applied locking adhesive, such as nylon patch, for anti-vibration applications. For automated feeding systems, we offer the screws in tape-and-reel or vibratory bowl-friendly packaging. The dog point’s concentricity is held to within 0.1mm TIR, ensuring reliable pick-and-place operations. In terms of dimensional interchangeability, these fasteners match the head profile and dog point dimensions of similar standard parts, making them direct replacements in existing designs. Whether you are replacing legacy fasteners or upgrading to a corrosion-resistant Single Slotted Tapered Countersunk Fasteners Full Dog Point, our inventory supports rapid prototyping and mass production.

Technical Specifications

• Head Style: Tapered countersunk with single straight slot drive
• Point Type: Full dog point with chamfered lead-in
• Thread Standard: Metric ISO 7045 / ANSI B18.6.3 equivalent
• Diameter Range: M2 through M10 (custom up to M12 available)
• Length Range: 4mm to 60mm in standard lengths
• Material & Finish: Steel (zinc plated, black oxide), Stainless Steel A2 (304) and A4 (316), Brass
• Strength Class: 4.8, 8.8, A2-70, A4-80
• Dog Point Length: Per ISO 4753 dimple-pin proportions
• Salt Spray Resistance: 72h+ for zinc-plated, 200h+ for A2 stainless
• Slot Dimensions: ISO 2380 compliant, hollow-ground driver recommended