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Machine Screws - Slotted Round - UNC

No4 UNC x 3/8

A machine screw is a type of screw that is commonly used in industrial and manufacturing applications to secure components within engines, electronic products and general machinery.

This type of machine screw has a round, domed head with a slotted recess that can be installed with a flat-bladed screwdriver or bit. They are available in zinc plated, brass or stainless steel.

They are available with imperial threads only.

About UNC Thread

UNC stands for Unified National Coarse. It is a common imperial thread type with less threads per axial distance than its UNF equivalent.

Unified thread types (UNF and UNC) were introduced at the beginning of World War 2 to enable the interchangeability of machinery manufacturing between the USA, Canada and Great Britain. Still commonly found on a vast array of old machines and vehicles in the UK, UNF and UNC threads continue to be the standard thread in the USA and Canada.

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View as Grid List

8 Items

View as Grid List

8 Items

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Pack Size
  1. 25 (6)item
  2. 5 (1) item
  3. 10 (1) item
Diameter
  1. 0.112" (4)item
  2. 0.138" (1) item
  3. 0.164" (1) item
  4. 3/16" (1) item
  5. 1/4" (1) item
Finish
  1. Bright Zinc Plated and Clear Passivation (5)item
  2. Self Colour (3)item
Number
  1. No6 (1) item
  2. No10 (1) item
  3. No4 (4)item
  4. No8 (1) item
Length Under Head
  1. 1/4" (1) item
  2. 3/8" (2)item
  3. 1" (1) item
  4. 1/2" (1) item
  5. 3/4" (3)item
Tapping Drill Size
  1. 5.1mm (1) item
  2. 2.85mm (1) item
  3. 3.9mm (1) item
  4. 3.5mm (1) item
  5. 2.35mm (4)item
Thread Length
  1. 3/8" (2)item
  2. 1/2" (1) item
  3. 3/4" (3)item
  4. 1" (1) item
  5. 1/4" (1) item
Threads Per Inch
  1. 20 (1) item
  2. 40 (4)item
  3. 24 (1) item
  4. 32 (2)item
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