Source high-performance STI taps designed to cut precision oversize threads for secure screw insert installations across demanding assembly environments.
Whether you need standard hand plug styles for general tapping or specialized spiral flute taps for blind-hole chip evacuation, AMTOIND provides the complete range of inch and metric sizes with flexible volume pricing, strict quality compliance, and same-day dispatch support for US manufacturing operations.
Product Variations & Sizes
Plug Style: (4-Thread Chamfer) Easy starting for through-holes and blind holes.
| Size | T.P.I | Number Of Flutes | Thread Class | Drill Bit Size | OAL | Part Number | Product Name |
| 2 | 56 | 3 | 2B | 41 Ga. | 1.88 | D77P001 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3 | 48 | 3 | 2B | 7/64″ | 1.94 | D77P002 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3 | 56 | 3 | 2B | 36 Ga. | 1.94 | D77P003 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 4 | 40 | 3 | 2B | 31 Ga. | 2.00 | D77P004 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 4 | 48 | 3 | 2B | 31 Ga. | 2.00 | D77P005 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 5 | 40 | 3 | 2B | 29 Ga. | 2.13 | D77P006 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 6 | 32 | 3 | 2B | 25 Ga. | 2.38 | D77P007 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 6 | 40 | 3 | 2B | 25 Ga. | 2.38 | D77P008 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 8 | 32 | 3 | 2B | 16 Ga. | 2.38 | D77P009 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 8 | 36 | 3 | 2B | 16 Ga. | 2.38 | D77P010 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 10 | 24 | 3 | 2B | 5 Ga. | 2.5 | D77P011 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 10 | 32 | 3 | 2B | 13/64″ | 2.5 | D77P012 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 12 | 24 | 3 | 2B | 1 Ga. | 2.72 | D77P013 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1/4 | 28 | 3 | 2B | 6.7 mm | 2.72 | D77P014 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1/4 | 20 | 3 | 2B | H | 2.72 | D77P015 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 5/16 | 24 | 4 | 2B | 21/64″ | 2.94 | D77P016 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 5/16 | 18 | 4 | 2B | Q | 2.94 | D77P017 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3/8 | 24 | 4 | 2B | 25/64″ | 3.38 | D77P018 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3/8 | 16 | 4 | 2B | X | 3.38 | D77P019 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 7/16 | 20 | 4 | 2B | 29/64″ | 3.59 | D77P020 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 7/16 | 14 | 4 | 2B | 29/64″ | 3.59 | D77P021 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1/2 | 20 | 4 | 2B | 33/64″ | 3.81 | D77P022 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1/2 | 13 | 4 | 2B | 17/32″ | 3.81 | D77P023 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 9/16 | 12 | 4 | 2B | 19/32″ | 4.03 | D77P024 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 9/16 | 18 | 4 | 2B | 37/64″ | 4.03 | D77P025 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 5/8 | 11 | 4 | 2B | 21/32″ | 4.25 | D77P026 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 5/8 | 18 | 4 | 2B | 41/64″ | 4.25 | D77P027 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3/4 | 10 | 4 | 2B | 25/32″ | 4.69 | D77P028 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 3/4 | 16 | 4 | 2B | 49/64″ | 4.69 | D77P029 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 7/8 | 14 | 4 | 2B | 57/64″ | 5.13 | D77P030 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 7/8 | 9 | 4 | 2B | 29/32″ | 5.13 | D77P031 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1 | 14 | 4 | 2B | 1 1/32″ | 5.75 | D77P032 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1 | 12 | 4 | 2B | 1 1/32″ | 5.75 | D77P033 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1 | 8 | 4 | 2B | 1 1/32″ | 5.75 | D77P034 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1-1/8 | 7 | 4 | 2B | 1 11/64″ | 6.06 | D77P035 | HIGH SPEED STEEL STI HAND TAP, PLUG |
| 1-1/4 | 12 | 4 | 2B | 1 9/32″ | 6.38 | D77P036 | HIGH SPEED STEEL STI HAND TAP, PLUG |
Bottoming Style: (2-Thread Chamfer) Ideal for blind holes that are drilled to a minimum depth.
| Size | T.P.I | Number Of Flutes | Thread Class | Drill Bit Size | OAL | Part Number | Product Name |
| 2 | 56 | 3 | 2B | 41 Ga. | 1.88 | D77B001 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3 | 48 | 3 | 2B | 7/64″ | 1.94 | D77B002 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3 | 56 | 3 | 2B | 36 Ga. | 1.94 | D77B003 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 4 | 40 | 3 | 2B | 31 Ga. | 2.00 | D77B004 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 4 | 48 | 3 | 2B | 31 Ga. | 2.00 | D77B005 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 5 | 40 | 3 | 2B | 29 Ga. | 2.13 | D77B006 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 6 | 32 | 3 | 2B | 25 Ga. | 2.38 | D77B007 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 6 | 40 | 3 | 2B | 25 Ga. | 2.38 | D77B008 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 8 | 32 | 3 | 2B | 16 Ga. | 2.38 | D77B009 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 8 | 36 | 3 | 2B | 16 Ga. | 2.38 | D77B010 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 10 | 24 | 3 | 2B | 5 Ga. | 2.5 | D77B011 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 10 | 32 | 3 | 2B | 13/64″ | 2.5 | D77B012 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 12 | 24 | 3 | 2B | 1 Ga. | 2.72 | D77B013 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1/4 | 28 | 3 | 2B | 6.7 mm | 2.72 | D77B014 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1/4 | 20 | 3 | 2B | H | 2.72 | D77B015 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 5/16 | 24 | 4 | 2B | 21/64″ | 2.94 | D77B016 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 5/16 | 18 | 4 | 2B | Q | 2.94 | D77B017 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3/8 | 24 | 4 | 2B | 25/64″ | 3.38 | D77B018 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3/8 | 16 | 4 | 2B | X | 3.38 | D77B019 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 7/16 | 20 | 4 | 2B | 29/64″ | 3.59 | D77B020 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 7/16 | 14 | 4 | 2B | 29/64″ | 3.59 | D77B021 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1/2 | 20 | 4 | 2B | 33/64″ | 3.81 | D77B022 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1/2 | 13 | 4 | 2B | 17/32″ | 3.81 | D77B023 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 9/16 | 12 | 4 | 2B | 19/32″ | 4.03 | D77B024 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 9/16 | 18 | 4 | 2B | 37/64″ | 4.03 | D77B025 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 5/8 | 11 | 4 | 2B | 21/32″ | 4.25 | D77B026 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 5/8 | 18 | 4 | 2B | 41/64″ | 4.25 | D77B027 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3/4 | 10 | 4 | 2B | 25/32″ | 4.69 | D77B028 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 3/4 | 16 | 4 | 2B | 49/64″ | 4.69 | D77B029 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 7/8 | 14 | 4 | 2B | 57/64″ | 5.13 | D77B030 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 7/8 | 9 | 4 | 2B | 29/32″ | 5.13 | D77B031 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1 | 14 | 4 | 2B | 1 1/32″ | 5.75 | D77B032 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1 | 12 | 4 | 2B | 1 1/32″ | 5.75 | D77B033 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1 | 8 | 4 | 2B | 1 1/32″ | 5.75 | D77B034 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1-1/8 | 7 | 4 | 2B | 1 11/64″ | 6.06 | D77B035 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
| 1-1/4 | 12 | 4 | 2B | 1 9/32″ | 6.38 | D77B036 | HIGH SPEED STEEL STI HAND TAP, BOTTOMING |
Spiral Flute Bottoming Style: (2-Thread Chamfer) Designed to pull chips out of deep or blind holes in soft materials
| Size | T.P.I | Number Of Flutes | Thread Class | Drill Bit Size | OAL | Part Number | Product Name |
| 2 | 56 | 2 | 2B | 41 Ga. | 1.88 | D76SF001 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3 | 48 | 2 | 2B | 7/64″ | 1.94 | D76SF002 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3 | 56 | 2 | 2B | 36 Ga. | 1.94 | D76SF003 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 4 | 40 | 2 | 2B | 31 Ga. | 2.00 | D76SF004 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 4 | 48 | 2 | 2B | 31 Ga. | 2.00 | D76SF005 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 5 | 40 | 3 | 2B | 29 Ga. | 2.13 | D76SF006 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 6 | 32 | 3 | 2B | 25 Ga. | 2.38 | D76SF007 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 6 | 40 | 3 | 2B | 25 Ga. | 2.38 | D76SF008 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 8 | 32 | 3 | 2B | 16 Ga. | 2.38 | D76SF009 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 8 | 36 | 3 | 2B | 16 Ga. | 2.38 | D76SF010 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 10 | 24 | 3 | 2B | 5 Ga. | 2.5 | D76SF011 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 10 | 32 | 3 | 2B | 13/64″ | 2.5 | D76SF012 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 12 | 24 | 3 | 2B | 1 Ga. | 2.72 | D76SF013 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1/4 | 28 | 3 | 2B | 6.7 mm | 2.72 | D76SF014 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1/4 | 20 | 3 | 2B | H | 2.72 | D76SF015 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 5/16 | 24 | 3 | 2B | 21/64″ | 2.94 | D76SF016 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 5/16 | 18 | 3 | 2B | Q | 2.94 | D76SF017 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3/8 | 24 | 3 | 2B | 25/64″ | 3.38 | D76SF018 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3/8 | 16 | 3 | 2B | X | 3.38 | D76SF019 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 7/16 | 20 | 3 | 2B | 29/64″ | 3.59 | D76SF020 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 7/16 | 14 | 3 | 2B | 29/64″ | 3.59 | D76SF021 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1/2 | 20 | 4 | 2B | 33/64″ | 3.81 | D76SF022 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1/2 | 13 | 4 | 2B | 17/32″ | 3.81 | D76SF023 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 9/16 | 12 | 4 | 2B | 19/32″ | 4.03 | D76SF024 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 9/16 | 18 | 4 | 2B | 37/64″ | 4.03 | D76SF025 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 5/8 | 11 | 4 | 2B | 21/32″ | 4.25 | D76SF026 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 5/8 | 18 | 4 | 2B | 41/64″ | 4.25 | D76SF027 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3/4 | 10 | 4 | 2B | 25/32″ | 4.69 | D76SF028 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 3/4 | 16 | 4 | 2B | 49/64″ | 4.69 | D76SF029 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 7/8 | 14 | 4 | 2B | 57/64″ | 5.13 | D76SF030 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 7/8 | 9 | 4 | 2B | 29/32″ | 5.13 | D76SF031 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1 | 14 | 4 | 2B | 1 1/32″ | 5.75 | D76SF032 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1 | 12 | 4 | 2B | 1 1/32″ | 5.75 | D76SF033 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1 | 8 | 4 | 2B | 1 1/32″ | 5.75 | D76SF034 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1-1/8 | 7 | 4 | 2B | 1 11/64″ | 6.06 | D76SF035 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
| 1-1/4 | 12 | 4 | 2B | 1 9/32″ | 6.38 | D76SF036 | HIGH SPEED STEEL SPIRAL FLUTE BOTTOMING STI TAP |
Spiral Pointed Plug Style: (4-Thread Chamfer) Free-cutting for use in long through-holes and in blind holes with chip clearance.
| Size | T.P.I | Number Of Flutes | Thread Class | Drill Bit Size | OAL | Part Number | Product Name |
| 2 | 56 | 2 | 2B | 41 Ga. | 1.88 | D78SP001 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3 | 48 | 2 | 2B | 7/64″ | 1.94 | D78SP002 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3 | 56 | 2 | 2B | 36 Ga. | 1.94 | D78SP003 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 4 | 40 | 2 | 2B | 31 Ga. | 2.00 | D78SP004 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 4 | 48 | 2 | 2B | 31 Ga. | 2.00 | D78SP005 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 5 | 40 | 2 | 2B | 29 Ga. | 2.13 | D78SP006 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 6 | 32 | 2 | 2B | 25 Ga. | 2.38 | D78SP007 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 6 | 40 | 2 | 2B | 25 Ga. | 2.38 | D78SP008 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 8 | 32 | 2 | 2B | 16 Ga. | 2.38 | D78SP009 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 8 | 36 | 2 | 2B | 16 Ga. | 2.38 | D78SP010 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 10 | 24 | 2 | 2B | 5 Ga. | 2.5 | D78SP011 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 10 | 32 | 2 | 2B | 13/64″ | 2.5 | D78SP012 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 12 | 24 | 2 | 2B | 1 Ga. | 2.72 | D78SP013 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1/4 | 28 | 2 | 2B | 6.7 mm | 2.72 | D78SP014 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1/4 | 20 | 2 | 2B | H | 2.72 | D78SP015 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 5/16 | 24 | 3 | 2B | 21/64″ | 2.94 | D78SP016 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 5/16 | 18 | 3 | 2B | Q | 2.94 | D78SP017 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3/8 | 24 | 3 | 2B | 25/64″ | 3.38 | D78SP018 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3/8 | 16 | 3 | 2B | X | 3.38 | D78SP019 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 7/16 | 20 | 3 | 2B | 29/64″ | 3.59 | D78SP020 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 7/16 | 14 | 3 | 2B | 29/64″ | 3.59 | D78SP021 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1/2 | 20 | 3 | 2B | 33/64″ | 3.81 | D78SP022 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1/2 | 13 | 3 | 2B | 17/32″ | 3.81 | D78SP023 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 9/16 | 12 | 4 | 2B | 19/32″ | 4.03 | D78SP024 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 9/16 | 18 | 4 | 2B | 37/64″ | 4.03 | D78SP025 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 5/8 | 11 | 4 | 2B | 21/32″ | 4.25 | D78SP026 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 5/8 | 18 | 4 | 2B | 41/64″ | 4.25 | D78SP027 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3/4 | 10 | 4 | 2B | 25/32″ | 4.69 | D78SP028 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 3/4 | 16 | 4 | 2B | 49/64″ | 4.69 | D78SP029 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 7/8 | 14 | 4 | 2B | 57/64″ | 5.13 | D78SP030 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 7/8 | 9 | 4 | 2B | 29/32″ | 5.13 | D78SP031 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1 | 14 | 4 | 2B | 1 1/32″ | 5.75 | D78SP032 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1 | 12 | 4 | 2B | 1 1/32″ | 5.75 | D78SP033 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1 | 8 | 4 | 2B | 1 1/32″ | 5.75 | D78SP034 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1-1/8 | 7 | 4 | 2B | 1 11/64″ | 6.06 | D78SP035 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
| 1-1/4 | 12 | 4 | 2B | 1 9/32″ | 6.38 | D78SP036 | HIGH SPEED STEEL SPIRAL POINTED PLUG STI TAP |
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