
Spiral Mill-Thread Inserts Spiral Mill-Thread Inserts ISO 60 ° METRIC ( INTERNAL ) UN 60 ° AMERICAN UN ( UNO UNF UNEF UNS INTERNAL ) P P w CD m w o SH 1/ 8P 1 / 8P Screw Screw Dimensions Dimensions Designation Pitch ( mm ) Thread Size Designation TPI Thread Size I W t I w t H 23 I 1.00 ISO 1.0 > 26 27 8.0 3.5 H 23 I 24 UN 24 > 1" 27 8.0 3.5 H 23 I 1.50 ISO 1.5 >27 27 8.0 3.5 H 23 I 20 UN 20 > 1" 27 8.0 3.5 H 23 I 2.00 ISO 2.0 > 28 27 8.0 3.5 H 23 I 18 UN 18 > 1 1 / 16 " 27 8.0 3.5 H 23 I 3.00 ISO 3.0 >30 27 8.0 3.5 H 23 I 16 UN 16 > 1 1 / 16 " 27 8.0 3.5 H 32 I 1.50 ISO 1.5 > 35 32 9.0 4.0 H 23 I 14 UN 14 >1 1/8" 27 8.0 3.5 H 32 I 2.00 ISO 2.0 > 36 32 9.0 4.0 H 23 I 12 UN 12 >1 1 / 8 " 27 8.0 3.5 H 32 I 3.00 ISO 3.0 >38 32 9.0 4.0 H 23 I 8 UN 8 > 1 3 / 16 " 27 8.0 3.5 H 32 I 4.00 ISO 4.0 > 40 32 9.0 4.0 H 23 I 7 UN 7 >1 1/4" 27 8.0 3.5 H 45 I 1.50 ISO 1.5 >50 37 11.9 5.0 H 32 I 20 UN 20 >1 3/ 8" 32 9.0 4.0 083 H 45 I 2.00 ISO 2.0 > 50 37 11.9 5.0 H 32 I 18 UN 18 >1 3 / 8 " 32 9.0 4.0 084 H 45 I 3.00 ISO 3.0 > 56 37 11.9 5.0 H 32 I 16 UN 16 >1 3 / 8 " 32 9.0 4.0 H 45 I 4.00 ISO 4.0 >56 37 11.9 5.0 H 32 I 12 UN 12 > 1 7 / 16 " 32 9.0 4.0 H 63 I 1.50 ISO 1.5 >70 38 11.9 5.0 H 32 I 8 UN 8 >1 1/2" 32 9.0 4.0 H 63 I 2.00 ISO 2.0 >70 38 11.9 5.0 H 32 I 6 UN 6 > 1 9 / 16 " 32 9.0 4.0 H 63 I 3.00 ISO 3.0 > 75 38 11.9 5.0 H 45 I 16 UN 16 >2" 37 11.9 5.0 H 63 I 4.00 ISO 4.0 >75 38 11.9 5.0 H 45 I 12 UN 12 > 2" 37 11.9 5.0 H 45 I 8 UN 8 >2 1/ 4 " 37 11.9 5.0 H 45 I 6 UN 6 >2 1/ 4 " 37 11.9 5.0 H 63 I 16 UN 16 >2 3/ 4 " 38 11.9 5.0 H 63 I 12 UN 12 >2 3/ 4 " 38 11.9 5.0 H 63 I 8 UN 8 > 3" 38 11.9 5.0 H 63 I 6 UN 6 > 3" 38 11.9 5.0