RAYCHIN LIMITED

Cup Point Set Screws (DIN 916 / ASME B18.3)

Alloy 20 cup point set screws are the most commonly used configuration, featuring a cup-shaped indentation on the end. The cup point edge cuts into the shaft or inner object, providing excellent resistance to rotational slippage. Ideal for quick, semi-permanent or permanent assembly applications in corrosive environments. Available with hex socket or slotted drive. Precision manufactured to DIN 916, ISO 4026, and ASME B18.3 standards. Sizes from M2 to M24 (metric) and #0 to 1" (inch). Supplied in solution annealed condition per ASTM B473. Suitable for securing gears, pulleys, and collars on shafts in chemical processing equipment.

Cone Point Set Screws (DIN 914 / ASME B18.3)

Alloy 20 cone point set screws feature a sharp cone-shaped point that provides the strongest clamping force due to deep penetration into the mating surface. The cone point creates a positive locking action that prevents loosening under severe vibration and thermal cycling in corrosive environments. Ideal for permanent assembly applications where maximum holding power is required. Available with hex socket or slotted drive. Precision manufactured to DIN 914, ISO 4027, and ASME B18.3 standards. Sizes from M2 to M24 (metric) and #0 to 1" (inch). Suitable for gas turbine components, mixer shafts, and high-temperature corrosive applications.

Flat Point Set Screws (DIN 913 / ASME B18.3)

Alloy 20 flat point set screws feature a flat, smooth bottom surface. This style is used when frequent adjustment or disassembly is required and minimal shaft deformation is desired. The flat point does not mar the mating surface, allowing for repeated repositioning. Ideal for applications requiring precise alignment and frequent maintenance in corrosive environments. Available with hex socket or slotted drive. Precision manufactured to DIN 913, ISO 4028, and ASME B18.3 standards. Sizes from M2 to M24 (metric) and #0 to 1" (inch). Suitable for instrument adjustment, positioning devices, and food processing equipment.

Half-Dog Point Set Screws (DIN 915 / ASME B18.3)

Alloy 20 half-dog point set screws feature a cylindrical projection that fits into a matching hole in the shaft, providing positive positioning and maximum resistance to axial movement. The half-dog point is ideal for applications requiring precise location and where the set screw must withstand thrust loads. Available with hex socket or slotted drive. Precision manufactured to DIN 915, ISO 4029, and ASME B18.3 standards. Sizes from M2 to M24 (metric) and #0 to 1" (inch). Suitable for gear and pulley retention in corrosive environments.

Socket & Drive Options

Alloy 20 set screws are available with multiple drive options to suit assembly requirements:

• Hex Socket: Standard drive for maximum torque transfer, sizes from 0.7mm to 10mm.
• Slotted Drive: Traditional drive for simple tooling.
• Torx Drive: For higher torque and reduced cam-out.
• Tamper-Resistant: Security drives for anti-tamper applications.

All drives are precision formed for positive engagement and reliable torque transfer.

Custom & Specialty Set Screws

Need a special point style, unusual thread size, or custom drive for your corrosive application? RAYCHIN engineers work with you to produce custom Alloy 20 set screws to your drawing. Options include knurled cup point, extended point, double-ended set screws, and special point angles. Expert heat treatment (solution annealed at 1030-1120°C) ensures optimum corrosion resistance. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS standards.

Metallurgical competence

Engineers on staff with deep expertise in nickel-based superalloys. We ensure proper solution annealing (1030-1120°C) for optimal corrosion resistance across all Alloy 20 set screws. Every heat is verified by in-house PMI testing to confirm chemistry. With 32-38% nickel and copper-molybdenum additions, our set screws provide exceptional resistance to sulfuric acid, phosphoric acid, and chloride stress corrosion cracking while maintaining reliable holding power.

Global approvals & traceability

Our quality system is ISO 9001:2015 and AS9100D certified; we also comply with NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN and KS. Full material traceability from melt to final packaging (EN 10204 3.1/3.2). Third-party inspections (ABS, DNV, Lloyds) available. All Alloy 20 set screws meet applicable ASTM B473, ASME SB473, NACE MR0175, and set screw standards including DIN 913-916, ISO 4026-4029, ASME B18.3.

Precision point forming & threading

In-house CNC turning and precision point forming capabilities ensure consistent point geometry and holding power. Cup points are precisely formed for optimal bite, cone points are sharp and concentric, flat points are perfectly square. Precision rolled threads provide superior fatigue life and dimensional accuracy. 100% thread inspection available.

Custom solutions

Need a special point style, unusual thread size, or custom drive for your corrosive application? Our engineering team works with you to produce custom Alloy 20 set screws to your drawing. We provide specialized surface treatments, passivation, and NACE MR0175 compliant processing per customer requirements.