High carbon steel taps with matching industrial high-speed steel drill bit. Provides proper hole size for easier tapping and stronger threads. No. 21660: 4-40 tap, No. 43 drill bit set No. 21661: 6-32 tap, No. 36 drill bit No. 21662: 8-32 tap, No. 29 drill bit No. 21663: 10-24 tap, No. 25 drill bit No. 21664: 10-32 tap, No. 21 drill bit No. 21665: 12-24 tap, No. 16 drill bit No. 21666: 1/4-20 tap, No. 7 drill bit No. 21667: 1/4-28 tap, No. 3 drill bit No. 21668: 5/16-18 tap, LTR. F drill bit No. 21669: 3/8-16 tap, 5/16 drill bit No. 21670: 1/2-13 tap, 27/64 drill bit No. 21671: 1/4-18 NPT tap, 7/16 drill bit
- 8/32 TAP & DRILL SET
- KW's: tap n drill set
