M1.6–M12 DIN916 A2-70 304 Stainless Steel Hex Socket Allen Cup Point Set Screw Grub Bolt

M1.6–M12 DIN916 A2-70 304 Stainless Steel Hex Socket Allen Cup Point Set Screw Grub Bolt

DIN916 A2-70 grade 304 stainless steel hex socket cup point set screws for corrosion-resistant shaft locking. The cup point tip bites into the shaft surface for maximum holding force. 304 stainless steel provides excellent corrosion resistance for marine, outdoor, food-processing, and humid environments where carbon steel set screws would corrode.

Key Specifications

Why Choose 304 SS Cup Point Set Screws?

• A2-70 304 stainless steel — corrosion-resistant for marine, outdoor, food-processing, and humid environments
• Cup point tip — bites into shaft for maximum holding force; prevents rotation and axial movement
• M1.6–M12 range — covers miniature electronics (M1.6–M2.5) to heavy industrial shaft locking (M10–M12)
• DIN916 standard — interchangeable with ISO 4029
• Flexible pack sizes — 5/10/50 pcs for prototyping or production quantities

Typical Applications

• Marine equipment shaft collar and propeller hub locking
• Outdoor machinery pulley and sprocket retention
• Food processing equipment shaft locking (stainless required)
• 3D printer GT2 pulley locking (M3 cup point)
• NEMA 17 stepper motor shaft collar retention
• Optical and scientific instrument adjustment locking in humid labs

Compatible With

Standard metric tapped holes M1.6–M12. Allen key sizes: M1.6=0.7mm, M2=0.9mm, M2.5=1.3mm, M3=1.5mm, M4=2mm, M5=2.5mm, M6=3mm, M8=4mm, M10=5mm, M12=6mm.

FAQ

Q: What is the difference between A2-70 304 SS and grade 12.9 black steel set screws?
A: Grade 12.9 black steel has higher tensile strength (1220 MPa vs 700 MPa for A2-70) but will corrode in wet or marine environments. Choose 304 SS for corrosion resistance; choose grade 12.9 for maximum strength in dry environments.

Q: What size do I need for a GT2 timing pulley?
A: Most GT2 pulleys for 3D printers use M3 cup point set screws. Check your pulley specification for confirmation.

Package Contents

• DIN916 A2-70 304 SS cup point set screws (5/10/50 pcs per selected variant)