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+1 (217) 579-8045IRWIN 3845 Die 1/2" - 20 NF HCS Adj. Round 1 Solid round fractional dies ideal for general purpose threading Adjustable round dies ideal for precision threading Specifications Item # Description Overall Diameter Package Type 3813 3/16" - 32 NS - Screw Adjustable 1" Bulk 3820 1/4" - 20 NC - Screw Adjustable 1" Bulk 3120 1/4" - 24 NS - Screw Adjustable 1" Bulk 3821 1/4" - 24 NS - Solid Round 1" Bulk 3823 1/4" - 28 NF - Screw Adjustable 1" Bulk 3824 1/4" - 32 NEF - Screw Adjustable 1" Bulk 3825 1/4" - 40 NS - Screw Adjustable 1" Bulk 3827 5/16" - 18 NC - Screw Adjustable 1" Bulk 3127 5/16" - 18 NC - Solid Round 1" Bulk 3829 5/16" - 24 NF - Screw Adjustable 1" Bulk 3831 5/16" - 32 NEF - Screw Adjustable 1" Bulk 3834 3/8" - 16 NC - Screw Adjustable 1" Bulk 3134 3/8" - 16 NC - Solid Round 1" Bulk 3836 3/8" - 24 NF - Screw Adjustable 1" Bulk 3839 7/16" - 14 NC - Screw Adjustable 1" Bulk 3840 7/16" - 20 NF - Screw Adjustable 1" Bulk 3844 1/2" - 13 NC - Screw Adjustable 1" Bulk 3845 1/2" - 20 NF - Screw Adjustable 1" Bulk 3846 1/2" - 24 NS - Screw Adjustable 1" Bulk