Imperial washers - Table 4

BS 3410  

Materials and Finishes:  

Steel/Zinc & clear 

Stainless steel/Self colour 

Brass/Self colour

Please note: Not all sizes stated are available from stock, please enquire for availability.

Note: Due to the fact that fastening applications differ greatly, the below information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.

Dimension data
To suit d (thread size)1/4 UNF5/16 UNF3/8 UNF7/16 UNF1/2 UNF9/16 UNF5/8 UNF
1/4 UNC5/16 UNC3/8 UNC7/16 UNC1/2 UNC9/16 UNC5/8 UNC
D max0.6250.7500.8751.0001.1251.2501.500
s heavy max0.0560.0720.0720.0920.0920.1040.116
s light max0.0400.0480.0480.0560.0560.0560.072


To suit d (thread size)3/4 UNF7/8 UNF1 UNF1.1/8 UNF1.1/4 UNF1.3/8 UNF1.1/2 UNF
3/4 UNC7/8 UNC1 UNC1.1/8 UNC1.1/4 UNC1.3/8 UNC1.1/2 UNC
D max1.6251.8752.1252.3752.6252.8753.125
s heavy max0.1280.1440.1600.1760.1760.1920.192
s light max0.0720.0720.0920.1040.1160.1280.128


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