UNC THREAD

UNC THREAD

UNC (Unified National Coarse) threads are the most common American imperial thread standard for general-purpose fasteners. Known for their robust, deep thread form, UNC threads provide strong, durable connections that are less prone to cross-threading and are easy to assemble and disassemble. 

Key Characteristics

  • Thread Angle: UNC threads use a 60° symmetrical V-profile flank angle, the same as modern metric ISO threads.
  • Designation: They are designated by their nominal major diameter (in inches) and the number of Threads Per Inch (TPI). For example, a 1/4"-20 UNC thread has a 1/4-inch diameter and 20 threads per inch.
  • Pitch: They have a larger pitch (fewer threads per inch) compared to the Unified National Fine (UNF) series.
  • Tolerances: The coarse pitch allows for greater tolerances in manufacturing and plating processes and makes them more tolerant of slightly dirty or damaged threads.

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Code Description Price Quantity
SMSNC025050PSP 1/4 UNC X 1/2 SLOT PAN MACHINE SCREW ZINC
535 In Stock for despatch
£820.00 (exc VAT) per THOU
£984.00 (inc VAT)
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SMSNC04025PSP No4 UNC X 1/4 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£203.10 (exc VAT) per THOU
£243.72 (inc VAT)
-
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SMSNC04037PS No4 UNC X 3/8 SLOT PAN MACHINE SCREW
Out of Stock
£200.90 (exc VAT) per THOU
£241.08 (inc VAT)
-
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SMSNC04050PSP No4 UNC X 1/2 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£260.90 (exc VAT) per THOU
£313.08 (inc VAT)
-
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SMSNC06037PSP No6 UNC X 3/8 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£202.00 (exc VAT) per THOU
£242.40 (inc VAT)
-
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SMSNC08087PSP No8 UNC X 7/8 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£1,958.00 (exc VAT) per THOUS
£2,349.60 (inc VAT)
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SMSNC10037PSP NO10UNC X 3/8 SLOT PAN MACHINE SCREW ZINC
Out of Stock
Price Unavailable
-
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SMSNC10075PSP No10UNC X 3/4 SLOT PAN MACHINE SCREW ZINC
Out of Stock
Price Unavailable
-
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SMSNC10125PS No10UNC X 1.1/4 SLOT PAN MACHINE SCREW
Out of Stock
£276.70 (exc VAT) per THOU
£332.04 (inc VAT)
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SMSNC10125PSP No10UNC X 1.1/4 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£387.30 (exc VAT) per THOU
£464.76 (inc VAT)
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SMSNC10150PS No10UNC X 1.1/2 SLOT PAN MACHINE SCREW
Out of Stock
£880.10 (exc VAT) per THOU
£1,056.12 (inc VAT)
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SMSNC10150PSP No10UNC X 1.1/2 SLOT PAN MACHINE SCREW ZINC
Out of Stock
£880.10 (exc VAT) per THOU
£1,056.12 (inc VAT)
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