M3–M10 DIN464 GB834 Knurled High Step Head Thumb Screw Hand Tighten Glass Curtain Wall Adjusting Bolt

M3–M10 DIN464 GB834 Knurled High Step Head Thumb Screw — Hand Tighten Glass Curtain Wall & Adjusting Bolt

DIN464 / GB834 knurled high step head thumb screws are the standard tool-free fastener for glass curtain wall systems, jig and fixture adjustment, and any application requiring frequent hand-tightening without tools. The high-profile stepped knurled head provides a large, ergonomic grip surface for maximum hand torque, while the machine thread shank allows precise adjustment and secure clamping.

Key Specifications

Parameter	Value
Standard	DIN464 / GB834
Head Style	High step knurled (large diameter, tall profile)
Thread Type	Metric machine thread (coarse)
Size Range	M3, M4, M5, M6, M8, M10
Drive	Hand (tool-free knurled head)
Application	Curtain wall, 3D printer, jig, fixture adjustment

Why Choose DIN464 High Step Thumb Screws?

• High step knurled head — tall, large-diameter knurled head provides maximum grip surface and hand torque; easier to tighten than low-profile thumb screws
• DIN464 / GB834 standard — internationally specified; widely used in glass curtain wall systems, jig and fixture design, and laboratory equipment
• Tool-free operation — hand-tighten and loosen without screwdriver or spanner; ideal for frequent adjustment and quick-release applications
• M3–M10 range — covers light electronics adjustment (M3–M4) through heavy curtain wall and structural adjustment (M8–M10)
• Machine thread shank — precise thread engagement for accurate position adjustment and secure clamping

Typical Applications

• Glass curtain wall and glazing system point fixing and adjustment (M6–M10)
• 3D printer frame and enclosure panel adjustment (M3–M5)
• Jig and fixture clamping and position adjustment (M4–M8)
• Laboratory and scientific instrument panel adjustment (M4–M6)
• CNC machine workholding and vise adjustment (M6–M10)
• Photography and camera rig quick-release mounting (M4–M6)

Compatible With

• Standard metric coarse thread tapped holes M3–M10
• Threaded rod and all-thread bar M3–M10
• T-slot aluminium extrusion captive nuts (M3, M4, M5, M6)
• Glass curtain wall point fixing systems (M6, M8, M10)

Package Contents

• DIN464 knurled high step head thumb screws in selected size, length, and quantity (per variant)

Frequently Asked Questions

Q: What is the difference between DIN464 and DIN653 thumb screws?

A: DIN464 has a high step head — a tall, large-diameter knurled head that provides maximum grip and hand torque. DIN653 has a flat head — a low-profile, disc-shaped knurled head for applications where head height is limited. Choose DIN464 for maximum grip; choose DIN653 where clearance is restricted.

Q: Can these be tightened with a spanner if needed?

A: The knurled cylindrical head is not designed for spanner use. For applications requiring tool-tightening, use a standard hex bolt instead. These are designed for hand tightening only.

Q: What size do I need for glass curtain wall adjustment?

A: Glass curtain wall point fixing systems typically use M6, M8, or M10 thumb screws depending on the system specification. M6 is most common for light glazing systems; M8–M10 for structural curtain wall applications. Check your curtain wall system specification before ordering.

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