ANSI N-RZ Roll Taps for Steels

SizeClassCodeChamferL (inch)ℓ (inch)ℓn (inch)ℓs (inch)Ds (inch)K (inch)ℓk (inch)LobeTYPE
1/2-13UNCH5389506M4P4.3311.024-2.2050.3670.2750.43784
1/2-13UNCH5389504M2P4.3311.024-2.2050.3670.2750.43784
1/2-13UNCH7389507M4P4.3311.024-2.2050.3670.2750.43784
1/2-13UNCH7389505M2P4.3311.024-2.2050.3670.2750.43784
1/2-20UNFH5389510M4P4.3311.024-2.2050.3670.2750.43784
1/2-20UNFH5389508M2P4.3311.024-2.2050.3670.2750.43784
1/2-20UNFH7389511M4P4.3311.024-2.2050.3670.2750.43784
1/2-20UNFH7389509M2P4.3311.024-2.2050.3670.2750.43784

Number of oil grooves : Metric thread : M3〜M7 = 4, M8 = 3, M10 and larger = 4 Unified thread : No.4 and smaller = non, No.5〜1/4 = 4, 5/16〜3/8 = 3, 7/16 and larger = 4 For M6, 1/4 and smaller with 2P chamfer, the external center is cut off.