Custom Set Screws Brass Stainless Steel Headless Hex Socket Screw Full Thread

Description

What are Set Screws?

Set screws are a type of fastener designed to secure an object within or against another object, typically without the use of a nut. They are threaded along their entire length or partially threaded and apply clamping force through pressure at their tip. Unlike regular screws, set screws don’t have heads that protrude beyond the surface they’re installed in.

Materials

1. Carbon Steel – Most common, economical choice

2. Alloy Steel – Higher strength than carbon steel

3. Stainless Steel (304 & 316) – Corrosion resistant

4. Brass – Corrosion resistant, non-magnetic, decorative

5. Titanium – High strength-to-weight ratio, corrosion resistant

6. A2 & A4 Marine Grade Stainless – For harsh environments

Surface Finishes

1. Plain/Unfinished – No coating, basic protection

2. Zinc Plated – Common corrosion protection

3. Black Oxide – Mild corrosion resistance, reduces glare

4. Hot-Dip Galvanized – Heavy-duty corrosion protection

5. Nickel Plated – Decorative and corrosion resistant

6. Chrome Plated – Hard, decorative finish

7. Phosphate Coated – Improves paint adhesion and corrosion resistance

Specifications

• Thread Types: UNC (coarse), UNF (fine), Metric

• Drive Types: Hex socket (Allen), Square socket, Slotted

• Point Types:

  • Cup point (most common, good grip)

  • Flat point (for soft materials)

  • Cone point (precise positioning)

  • Oval point (compromise between cup and flat)

  • Knurled cup (extra grip)

  • Dog point (precise location)

• Sizes: Range from #0 (1.5mm) up to 1.5″ (38mm) diameter or larger

• Standards: ASME B18.3, DIN 916, ISO 4026-4029

Application Fields

1. Industrial Machinery – Securing gears, pulleys, and bearings

2. Automotive – Component assembly and adjustment

3. Electronics – Securing components in housings

4. Construction – Fixture and hardware installation

5. Aerospace – Precision component positioning

6. Medical Equipment – Secure delicate mechanisms

7. Consumer Products – Furniture assembly, appliances

Excellent Case: Robotic Arm Joint Assembly

Challenge: A robotics manufacturer needed to securely fasten servo motor shafts to robotic arm linkages while allowing for precise angular adjustments during calibration.

Solution: They used cup-point set screws (M6×1.0, 10mm length, alloy steel, black oxide finish) in three key locations:

1. To secure the harmonic drive to the motor shaft

2. To fasten the arm linkage to the drive output

3. To lock the angular position after calibration

Benefits Achieved:

• Precise Positioning: Cup point provided excellent grip without damaging shafts

• Secure Fastening: High clamping force prevented slippage under dynamic loads

• Adjustability: Allowed for fine-tuning during assembly and calibration

• Space Saving: Flush installation conserved valuable space in compact joints

• Durability: Black oxide finish resisted corrosion in industrial environments

Result: The robotic arms maintained precise alignment through millions of cycles with zero slippage incidents, demonstrating the reliability of properly specified set screws in critical motion applications.