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.

No detailed specifications are available for this product.

There are no downloads for this product.

Code Description Price Quantity
SMSNC04025P*P No4 UNC X 1/4 POZI PAN MACHINE SCREW ZINC
900 In Stock for despatch
£187.50 (exc VAT) per THOU
£225.00 (inc VAT)
-
+
SMSNC06026P* No6 UNC X 1/4 POZI PAN MACHINE SCREW
Out of Stock
£117.30 (exc VAT) per THOU
£140.76 (inc VAT)
-
+
SMSNC06031P* No6 UNC X 5/16 POZI PAN MACHINE SCREW
Out of Stock
£198.90 (exc VAT) per THOU
£238.68 (inc VAT)
-
+
SMSNC06044P*P NO6 UNC X 7/16 POZI PAN MACHINE SCREW ZINC
Out of Stock
Price Unavailable
-
+
SMSNC08025P* No8 UNC X 1/4 POZI PAN MACHINE SCREW
850 In Stock for despatch
£160.00 (exc VAT) per THOU
£192.00 (inc VAT)
-
+
SMSNC08087P*P No8 UNC X 7/8 PAN HD POZI MACHINE SCREW ZINC
Out of Stock
£125.50 (exc VAT) per THOUS
£150.60 (inc VAT)
-
+
SMSNC10025P* No10UNC X 1/4 POZI PAN MACHINE SCREW
900 In Stock for despatch
£233.00 (exc VAT) per THOU
£279.60 (inc VAT)
-
+
SMSNC10031P* No10UNC X 5/16 POZI PAN MACHINE SCREW ZINC
Out of Stock
£221.30 (exc VAT) per THOU
£265.56 (inc VAT)
-
+
SMSNC6019P* No6 UNC X 3/16 POZI PAN MACHINE SCREW
Out of Stock
£142.00 (exc VAT) per THOU
£170.40 (inc VAT)
-
+
SMSNC6025P* No6 UNC X 1/4 POZI PAN MACHINE SCREW
Out of Stock
£71.70 (exc VAT) per THOU
£86.04 (inc VAT)
-
+