1/4"-20 Knurled Thumb Machine Screw Solid Brass

1/4"-20 Solid Brass Knurled Head Thumb Screws

Diameter - Thread Pitch: 1/4"-20


1/4"-20 Brass knurled head thumb screws in solid brass.

  • Knurled head intended to be driven by fingers
  • ASME Standards specific
  • Aesthetically pleasing and typically used for ornamental products
  • The more zinc in a screw the lighter it will tend to be
  • Brass is corrosive resistant but very soft material
  • Commonly used for:
    • Firearms
    • Weather Stripping
    • Pipes
NOTE: Color and sheen may vary

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Product Specifications
ANSI
B18.6.3
Color
Yellow
Color May Vary
Color and sheen may vary
Corrosion Resistant
Yes
Drive Style
Hand
Elongation
10% - 25%
Hardness
40-75 Rockwell B
Head Diameter
23/32" (.09375)
Head Style
Thumb
Material
Brass
Overall Head Height
1/2"
Product Type
Knurled Head Thumb Screws
System of Measurement (Unit)
Inch
Thread Diameter
1/4"
Thread Diameter Major
0.2489
Thread Diameter Minor
0.2408
Thread Direction
Right Hand
Thread Pitch (Count)
20 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Yield PSI
30,000 - 50,000