ANSI B 1.1，用于900N/mm2以下的材料，适用盲孔。

UNC 1.1/2 x 6

UNC粗牙机用丝锥 产品编号	UNC粗牙机用丝锥 规格说明
525227001	UNC No.4 x 40
525227004	UNC No.5 x 40
525227007	UNC No.6 x 32
525227010	UNC No.8 x 32
525227013	UNC No.10 x 24
525227016	UNC No.12 x 24
525227019	UNC 1/4 x 20
525227022	UNC 5/16 x 18
525227025	UNC 3/8 x 16
525227101	UNC No.4 x 40
525227104	UNC No.5 x 40
525227107	UNC No.6 x 32
525227110	UNC No.8 x 32
525227113	UNC No.10 x 24
525227116	UNC No.12 x 24
525227119	UNC 1/4 x 20
525227122	UNC 5/16 x 18
525227125	UNC 3/8 x 16
525227128	UNC 7/16 x 14
525227131	UNC 1/2 x 13
525227134	UNC 9/16 x 12
525227137	UNC 5/8 x 11
525227140	UNC 3/4 x 10
525227143	UNC 7/8 x 9
525227146	UNC 1" x 8
525227149	UNC 1.1/4 x 7
525227155	UNC 1.3/4 x 5
525227158	UNC 2" x 4.1/2