99 sizes

Unified (UNC / UNF / UNEF) threads

Tap the size you need for its full dimensions, tap drill, clearance hole, torque estimate and wrench sizes.

UNC — Unified coarse UNF — Unified fine UNEF — Unified extra-fine UN — Unified constant-pitch

27 sizes

UNC — Unified coarse

#1-64 UNCTap #53Ø 1.854 mm · pitch 0.397 mm #2-56 UNCTap #50Ø 2.184 mm · pitch 0.454 mm #3-48 UNCTap #47Ø 2.515 mm · pitch 0.529 mm #4-40 UNCTap #43Ø 2.845 mm · pitch 0.635 mm #5-40 UNCTap #38Ø 3.175 mm · pitch 0.635 mm #6-32 UNCTap #36Ø 3.505 mm · pitch 0.794 mm #8-32 UNCTap #29Ø 4.166 mm · pitch 0.794 mm #10-24 UNCTap #25Ø 4.826 mm · pitch 1.058 mm #12-24 UNCTap #16Ø 5.486 mm · pitch 1.058 mm 1/4-20 UNCTap #7Ø 6.35 mm · pitch 1.27 mm 5/16-18 UNCTap FØ 7.938 mm · pitch 1.411 mm 3/8-16 UNCTap 5/16"Ø 9.525 mm · pitch 1.588 mm 7/16-14 UNCTap UØ 11.112 mm · pitch 1.814 mm 1/2-13 UNCTap 27/64"Ø 12.7 mm · pitch 1.954 mm 9/16-12 UNCTap 31/64"Ø 14.288 mm · pitch 2.117 mm 5/8-11 UNCTap 17/32"Ø 15.875 mm · pitch 2.309 mm 3/4-10 UNCTap 21/32"Ø 19.05 mm · pitch 2.54 mm 7/8-9 UNCTap 49/64"Ø 22.225 mm · pitch 2.822 mm 1-8 UNCTap 7/8"Ø 25.4 mm · pitch 3.175 mm 1-1/8-7 UNCTap 63/64"Ø 28.575 mm · pitch 3.629 mm 1-1/4-7 UNCTap 1"Ø 31.75 mm · pitch 3.629 mm 1-3/8-6 UNCTap 1"Ø 34.925 mm · pitch 4.233 mm 1-1/2-6 UNCTap 1"Ø 38.1 mm · pitch 4.233 mm 1-3/4-5 UNCTap 1"Ø 44.45 mm · pitch 5.08 mm 2-4.5 UNCTap 1"Ø 50.8 mm · pitch 5.644 mm 2-1/4-4.5 UNCTap 1"Ø 57.15 mm · pitch 5.644 mm 2-1/2-4 UNCTap 1"Ø 63.5 mm · pitch 6.35 mm

24 sizes

UNF — Unified fine

#0-80 UNFTap 3/64"Ø 1.524 mm · pitch 0.318 mm #1-72 UNFTap #53Ø 1.854 mm · pitch 0.353 mm #2-64 UNFTap #50Ø 2.184 mm · pitch 0.397 mm #3-56 UNFTap #45Ø 2.515 mm · pitch 0.454 mm #4-48 UNFTap #42Ø 2.845 mm · pitch 0.529 mm #5-44 UNFTap #37Ø 3.175 mm · pitch 0.577 mm #6-40 UNFTap #33Ø 3.505 mm · pitch 0.635 mm #8-36 UNFTap #29Ø 4.166 mm · pitch 0.706 mm #10-32 UNFTap #21Ø 4.826 mm · pitch 0.794 mm #12-28 UNFTap #14Ø 5.486 mm · pitch 0.907 mm 1/4-28 UNFTap #3Ø 6.35 mm · pitch 0.907 mm 5/16-24 UNFTap IØ 7.938 mm · pitch 1.058 mm 3/8-24 UNFTap QØ 9.525 mm · pitch 1.058 mm 7/16-20 UNFTap 25/64"Ø 11.112 mm · pitch 1.27 mm 1/2-20 UNFTap 29/64"Ø 12.7 mm · pitch 1.27 mm 9/16-18 UNFTap 33/64"Ø 14.288 mm · pitch 1.411 mm 5/8-18 UNFTap 37/64"Ø 15.875 mm · pitch 1.411 mm 3/4-16 UNFTap 11/16"Ø 19.05 mm · pitch 1.588 mm 7/8-14 UNFTap 13/16"Ø 22.225 mm · pitch 1.814 mm 1-12 UNFTap 59/64"Ø 25.4 mm · pitch 2.117 mm 1-1/8-12 UNFTap 1"Ø 28.575 mm · pitch 2.117 mm 1-1/4-12 UNFTap 1"Ø 31.75 mm · pitch 2.117 mm 1-3/8-12 UNFTap 1"Ø 34.925 mm · pitch 2.117 mm 1-1/2-12 UNFTap 1"Ø 38.1 mm · pitch 2.117 mm

15 sizes

UNEF — Unified extra-fine

#12-32 UNEFTap #13Ø 5.486 mm · pitch 0.794 mm 1/4-32 UNEFTap 7/32"Ø 6.35 mm · pitch 0.794 mm 5/16-32 UNEFTap 9/32"Ø 7.938 mm · pitch 0.794 mm 3/8-32 UNEFTap 11/32"Ø 9.525 mm · pitch 0.794 mm 7/16-28 UNEFTap YØ 11.112 mm · pitch 0.907 mm 1/2-28 UNEFTap 15/32"Ø 12.7 mm · pitch 0.907 mm 9/16-24 UNEFTap 33/64"Ø 14.288 mm · pitch 1.058 mm 5/8-24 UNEFTap 37/64"Ø 15.875 mm · pitch 1.058 mm 3/4-20 UNEFTap 45/64"Ø 19.05 mm · pitch 1.27 mm 7/8-20 UNEFTap 53/64"Ø 22.225 mm · pitch 1.27 mm 1-20 UNEFTap 61/64"Ø 25.4 mm · pitch 1.27 mm 1-1/8-18 UNEFTap 1"Ø 28.575 mm · pitch 1.411 mm 1-1/4-18 UNEFTap 1"Ø 31.75 mm · pitch 1.411 mm 1-3/8-18 UNEFTap 1"Ø 34.925 mm · pitch 1.411 mm 1-1/2-18 UNEFTap 1"Ø 38.1 mm · pitch 1.411 mm

33 sizes

UN — Unified constant-pitch

9/16-20 UNTap 33/64"Ø 14.288 mm · pitch 1.27 mm 5/8-20 UNTap 37/64"Ø 15.875 mm · pitch 1.27 mm 5/8-16 UNTap 9/16"Ø 15.875 mm · pitch 1.588 mm 3/4-12 UNTap 43/64"Ø 19.05 mm · pitch 2.117 mm 7/8-16 UNTap 13/16"Ø 22.225 mm · pitch 1.588 mm 7/8-12 UNTap 51/64"Ø 22.225 mm · pitch 2.117 mm 1-16 UNTap 15/16"Ø 25.4 mm · pitch 1.588 mm 1-1/8-20 UNTap 1"Ø 28.575 mm · pitch 1.27 mm 1-1/8-16 UNTap 1"Ø 28.575 mm · pitch 1.588 mm 1-1/8-8 UNTap 1"Ø 28.575 mm · pitch 3.175 mm 1-1/4-20 UNTap 1"Ø 31.75 mm · pitch 1.27 mm 1-1/4-16 UNTap 1"Ø 31.75 mm · pitch 1.588 mm 1-1/4-8 UNTap 1"Ø 31.75 mm · pitch 3.175 mm 1-3/8-20 UNTap 1"Ø 34.925 mm · pitch 1.27 mm 1-3/8-16 UNTap 1"Ø 34.925 mm · pitch 1.588 mm 1-3/8-8 UNTap 1"Ø 34.925 mm · pitch 3.175 mm 1-1/2-20 UNTap 1"Ø 38.1 mm · pitch 1.27 mm 1-1/2-16 UNTap 1"Ø 38.1 mm · pitch 1.588 mm 1-1/2-8 UNTap 1"Ø 38.1 mm · pitch 3.175 mm 1-3/4-20 UNTap 1"Ø 44.45 mm · pitch 1.27 mm 1-3/4-16 UNTap 1"Ø 44.45 mm · pitch 1.588 mm 1-3/4-12 UNTap 1"Ø 44.45 mm · pitch 2.117 mm 1-3/4-8 UNTap 1"Ø 44.45 mm · pitch 3.175 mm 2-20 UNTap 1"Ø 50.8 mm · pitch 1.27 mm 2-16 UNTap 1"Ø 50.8 mm · pitch 1.588 mm 2-12 UNTap 1"Ø 50.8 mm · pitch 2.117 mm 2-8 UNTap 1"Ø 50.8 mm · pitch 3.175 mm 2-1/4-16 UNTap 1"Ø 57.15 mm · pitch 1.588 mm 2-1/4-12 UNTap 1"Ø 57.15 mm · pitch 2.117 mm 2-1/4-8 UNTap 1"Ø 57.15 mm · pitch 3.175 mm 2-1/2-16 UNTap 1"Ø 63.5 mm · pitch 1.588 mm 2-1/2-12 UNTap 1"Ø 63.5 mm · pitch 2.117 mm 2-1/2-8 UNTap 1"Ø 63.5 mm · pitch 3.175 mm