UNF THREAD

UNF THREAD

UNF (Unified National Fine) threads are an American imperial thread standard known for their fine pitch, which provides increased strength, superior vibration resistance, and tighter tolerances compared to the coarser UNC (Unified National Coarse) threads. 

Key Characteristics

  • Thread Angle: UNF threads, as part of the Unified Thread Standard (UTS), use a symmetrical V-profile with a 60° flank angle, which is the same angle used for modern ISO metric threads.
  • Designation: They are designated by their nominal major diameter (in inches) followed by the number of Threads Per Inch (TPI). For example, a 1/4"-28 UNF thread has a 1/4-inch diameter and 28 threads per inch.
  • Pitch: They have a smaller pitch and a higher thread density than UNC threads, meaning more threads per unit of length.
  • Strength: The finer pitch results in a larger tensile stress area for a given diameter and a greater number of engaged threads, contributing to a stronger connection less prone to loosening under vibration.

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Code Description Price Quantity
SKSTNF025025 1/4 UNF X 1/4 SOCKET SETSCREW
52 In Stock for despatch
£19.10 (exc VAT) per HUND
£22.92 (inc VAT)
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+
SKSTNF025031 1/4 UNF X 5/16 SOCKET SETSCREW
101 In Stock for despatch
£7.22 (exc VAT) per HUND
£8.66 (inc VAT)
-
+
SKSTNF025037 1/4 UNF X 3/8 SOCKET SETSCREW
Out of Stock
£91.30 (exc VAT) per HUND
£109.56 (inc VAT)
-
+
SKSTNF025050 1/4 UNF X 1/2 SOCKET SETSCREW
23 In Stock for despatch
Price Unavailable
-
+
SKSTNF025075 1/4 UNF X 3/4 SOCKET SETSCREW
101 In Stock for despatch
£15.42 (exc VAT) per HUND
£18.50 (inc VAT)
-
+
SKSTNF025100 1/4 UNF X 1" SOCKET SETSCREW
Out of Stock
£99.20 (exc VAT) per HUND
£119.04 (inc VAT)
-
+
SKSTNF031031FP 5/16 UNF X 5/16 SOCKET SETSCREW FLAT POINT
18 In Stock for despatch
£8.10 (exc VAT) per HUND
£9.72 (inc VAT)
-
+
SKSTNF031031KC 5/16 UNF X 5/16 SOCKET SETSCREW KNURLED CUP PT
Out of Stock
£12.30 (exc VAT) per HUND
£14.76 (inc VAT)
-
+
SKSTNF031037 5/16 UNF X 3/8 SOCKET SETSCREW
64 In Stock for despatch
£13.00 (exc VAT) per HUND
£15.60 (inc VAT)
-
+
SKSTNF031050 5/16 UNF X 1/2 SOCKET SETSCREW
20 In Stock for despatch
Price Unavailable
-
+
SKSTNF031062 5/16 UNF X 5/8 SOCKET SETSCREW
Out of Stock
£59.50 (exc VAT) per HUND
£71.40 (inc VAT)
-
+
SKSTNF031075 5/16 UNF X 3/4 SOCKET SETSCREW
150 In Stock for despatch
Price Unavailable
-
+
SKSTNF031100 5/16 UNF X 1" SOCKET SETSCREW
90 In Stock for despatch
Price Unavailable
-
+
SKSTNF031125 5/16 UNF X 1.1/4 SOCKET SETSCREW
Out of Stock
£193.00 (exc VAT) per HUND
£231.60 (inc VAT)
-
+
SKSTNF031150 5/16 UNF X 1.1/2 SOCKET SETSCREW
Out of Stock
£826.30 (exc VAT) per HUND
£991.56 (inc VAT)
-
+
SKSTNF037037 3/8 UNF X 3/8 SOCKET SETSCREW
127 In Stock for despatch
£11.30 (exc VAT) per HUND
£13.56 (inc VAT)
-
+
SKSTNF037050 3/8 UNF X 1/2 SOCKET SETSCREW
138 In Stock for despatch
Price Unavailable
-
+
SKSTNF037062 3/8 UNF X 5/8 SOCKET SETSCREW
165 In Stock for despatch
£112.95 (exc VAT) per HUND
£135.54 (inc VAT)
-
+
SKSTNF037075 3/8 UNF X 3/4 SOCKET SETSCREW
300 In Stock for despatch
Price Unavailable
-
+
SKSTNF037100 3/8 UNF X 1" SOCKET SETSCREW
Out of Stock
£180.60 (exc VAT) per HUND
£216.72 (inc VAT)
-
+
SKSTNF037150 3/8 UNF X 1.1/2 SOCKET SETSCREW
Out of Stock
£217.60 (exc VAT) per HUND
£261.12 (inc VAT)
-
+
SKSTNF037200 3/8 UNF X 2" SOCKET SETSCREW
29 In Stock for despatch
Price Unavailable
-
+
SKSTNF044037 7/16 UNF X 3/8 SOCKET SETSCREW
Out of Stock
£108.30 (exc VAT) per HUND
£129.96 (inc VAT)
-
+
SKSTNF050044 1/2 UNF X 7/16 SOCKET SETSCREW
Out of Stock
Price Unavailable
-
+
SKSTNF050050 1/2 UNF X 1/2 SOCKET SETSCREW
Out of Stock
£292.30 (exc VAT) per HUND
£350.76 (inc VAT)
-
+
SKSTNF050050P 1/2 UNF X 1/2 SOCKET SETSCREW ZINC PLATED
Out of Stock
Price Unavailable
-
+
SKSTNF050075 1/2 UNF X 3/4 SOCKET SETSCREW
Out of Stock
Price Unavailable
-
+
SKSTNF050100 1/2 UNF X 1" SOCKET SETSCREW
13 In Stock for despatch
Price Unavailable
-
+
SKSTNF050100P 1/2 UNF X 1" SOCKET SETSCREW ZINC PLATED
Out of Stock
£136.30 (exc VAT) per HUND
£163.56 (inc VAT)
-
+
SKSTNF050150CP 1/2 UNF X 1.1/2 SOCKET SETSCREW CUP PT
80 In Stock for despatch
£385.50 (exc VAT) per HUND
£462.60 (inc VAT)
-
+
SKSTNF050150TI 1/2 UNF X 1.1/2 SKT SET SCREW TITANIUM GR 2 CUP
Out of Stock
£7,800.00 (exc VAT) per HUND
£9,360.00 (inc VAT)
-
+
SKSTNF050200 1/2 UNF X 2" SOCKET SETSCREW
40 In Stock for despatch
£494.50 (exc VAT) per HUND
£593.40 (inc VAT)
-
+
SKSTNF062200 5/8 UNF X 2" SOCKET SETSCREW
Out of Stock
£2,466.10 (exc VAT) per HUND
£2,959.32 (inc VAT)
-
+
SKSTNF10025 NO10 UNF X 1/4 SOCKET SETSCREW
1 In Stock for despatch
£5.40 (exc VAT) per HUND
£6.48 (inc VAT)
-
+
SKSTNF10025DP No.10-32 UNF X 1/4" DOG POINT SOCKET SETSCREWS
Out of Stock
£8.00 (exc VAT) per HUND
£9.60 (inc VAT)
-
+
SKSTNF10037 NO10 UNF X 3/8 SOCKET SETSCREW
Out of Stock
Price Unavailable
-
+
SKSTNF10050 NO10 UNF X 1/2 SOCKET SETSCREW
Out of Stock
£10.80 (exc VAT) per HUND
£12.96 (inc VAT)
-
+
SKSTNF10062 NO10 UNF X 5/8" SOCKET SETSCREW
Out of Stock
£15.00 (exc VAT) per HUND
£18.00 (inc VAT)
-
+
SKSTNF10100 NO10 UNF X 1" SOCKET SETSCREW
Out of Stock
£123.00 (exc VAT) per HUND
£147.60 (inc VAT)
-
+
SKSTNF10125 NO10 UNF X 1.1/4 SOCKET SETSCREW
Out of Stock
£164.30 (exc VAT) per HUND
£197.16 (inc VAT)
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