Threaded Insert Taps
Screw thread insert taps (STI taps) operate in the same manner as “standard†taps, but produce an oversized thread specifically for threaded inserts. During insert installation, the threads cut by an STI tap form the insert into the desired thread size. STI taps are ideal for tapping holes in softer metals that require a strong threaded insert. STI taps are manufactured from high speed steel (HSS) for superior durability. We offer STI taps in a wide range of inch, metric, and spark plug sizes to meet your unique requirements.

Available In:
- Inch sizes from #2 to 3-1/2
- Metric sizes from M2.2 to M64
- Manufactured from high speed steel (HSS)
- Straight flute
- 4-thread lead
-
Filter
- Inside Thread M3.5 x 0.6 Remove This Item
- Inside Thread M16 x 1.5 Remove This Item
- Inside Thread M48 x 5 Remove This Item
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- Type
- ID Thread Rotation
- Inside Thread
-
- M2 x 0.4 2 items
- 2-56 2 items
- M2.2 x 0.45 2 items
- M2.5 x 0.45 2 items
- 3-48 2 items
- 3-56 2 items
- 4-40 2 items
- 4-48 2 items
- M3 x 0.5 2 items
- 1/8-40 1 item
- 5-40 2 items
- M3.5 x 0.6 2 items
- 6-32 2 items
- 6-40 2 items
- M4 x 0.7 2 items
- 8-32 2 items
- 8-36 2 items
- 3/16-24 1 item
- 10-24 2 items
- 10-32 2 items
- M5 x 0.8 2 items
- 12-24 2 items
- 12-28 2 items
- M6 x 1 3 items
- 1/4-20 5 items
- 1/4-26 1 item
- 1/4-28 3 items
- M7 x 1 2 items
- 5/16-18 4 items
- 5/16-22 1 item
- 5/16-24 3 items
- M8 x 1 3 items
- M8 x 1.25 3 items
- M9 x 1 2 items
- M9 x 1.25 2 items
- 3/8-16 4 items
- 3/8-20 1 item
- 3/8-24 3 items
- 1/8-28 1 item
- M10 x 1 2 items
- M10 x 1.25 3 items
- M10 x 1.5 3 items
- 1/8-27 1 item
- M11 x 1 2 items
- M11 x 1.25 2 items
- M11 x 1.5 2 items
- 7/16-14 4 items
- 7/16-18 1 item
- 7/16-20 3 items
- M12 x 1 2 items
- M12 x 1.25 3 items
- M12 x 1.5 2 items
- M12 x 1.75 3 items
- 1/2-12 1 item
- 1/2-13 3 items
- 1/2-16 1 item
- 1/2-20 3 items
- 1/4-19 1 item
- 1/4-18 1 item
- M14 x 1.25 2 items
- M14 x 1.5 3 items
- M14 x 2 3 items
- 9/16-12 2 items
- 9/16-18 3 items
- 5/8-11 4 items
- 5/8-14 2 items
- 5/8-18 3 items
- M16 x 1.5 3 items
- M16 x 2 3 items
- 3/8-19 1 item
- 3/8-18 1 item
- M18 x 1.5 3 items
- M18 x 2 2 items
- M18 x 2.5 3 items
- 3/4-10 4 items
- 3/4-12 1 item
- 3/4-16 3 items
- M20 x 1.5 3 items
- M20 x 2 2 items
- M20 x 2.5 3 items
- 1/2-14 2 items
- M22 x 1.5 3 items
- M22 x 2 2 items
- 7/8-11 1 item
- M22 x 2.5 2 items
- 7/8-14 4 items
- 7/8-18 1 item
- 7/8-9 4 items
- M24 x 1.5 2 items
- M24 x 2 3 items
- M24 x 3 3 items
- 1-10 1 item
- 1-14 3 items
- 1-12 2 items
- 1-8 4 items
- M26 x 1.5 2 items
- 3/4-14 2 items
- M27 x 1.5 2 items
- M27 x 2 2 items
- M27 x 3 2 items
- M28 x 1.5 2 items
- 1-1/8-12 2 items
- 1-1/8-7 2 items
- 1-1/8-8 2 items
- M30 x 1.5 2 items
- M30 x 2 2 items
- M30 x 3 2 items
- M30 x 3.5 2 items
- 1-1/4-12 2 items
- 1-1/4-7 2 items
- 1-1/4-8 2 items
- M33 x 2 2 items
- M33 x 3 2 items
- M33 x 3.5 2 items
- 1-11 1 item
- 1-11-1/2 1 item
- M34 x 1.5 2 items
- 1-3/8-12 2 items
- 1-3/8-6 2 items
- 1-3/8-8 2 items
- M36 x 1.5 2 items
- M36 x 2 2 items
- M36 x 3 2 items
- M36 x 4 2 items
- 1-1/2-12 2 items
- 1-1/2-6 2 items
- 1-1/2-8 2 items
- M39 x 3 2 items
- M39 x 4 2 items
- M42 x 3 2 items
- 1-5/8-8 2 items
- M42 x 4.5 2 items
- 1-1/4-11 1 item
- 1-3/4-8 2 items
- M45 x 2 2 items
- M45 x 4.5 2 items
- 1-7/8-8 2 items
- M48 x 3 2 items
- M48 x 5 2 items
- 2 in-8 2 items
- M52 x 3 2 items
- M52 x 5 2 items
- 2-1/8-8 2 items
- M54 x 3 2 items
- M56 x 3 2 items
- M56 x 4 2 items
- M56 x 5.5 2 items
- 2-1/4-8 2 items
- 2-3/8-8 2 items
- 2-1/2-8 2 items
- M64 x 3 2 items
- M64 x 4 2 items
- 2-5/8-8 2 items
- 2-3/4-8 2 items
- 2-7/8-8 2 items
- 3 in-8 2 items
- 3-1/8-8 2 items
- 3-1/4-8 2 items
- 3-3/8-8 2 items
- 3-1/2-8 2 items
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Sku #: 35L7H1-1Z50V-C48V
M48 x 5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C16J
M16 x 1.5 STI Bottoming Tap - High Speed SteelSpecial Price $84.21 Regular Price $119.93 -
Sku #: 35L7H1-1Z50V-B35B
M3.5 x 0.6 STI Bottoming Tap - High Speed SteelSpecial Price $21.98 Regular Price $31.30 -
Sku #: 35L7H1-21Z0V-C16J
M16 x 1.5 Left-Hand STI Plug Tap - High Speed SteelSpecial Price $161.51 Regular Price $230.00 -
Sku #: 35L7H1-1YV0V-C16J
M16 x 1.5 STI Plug Tap - High Speed SteelSpecial Price $84.21 Regular Price $119.93 -
Sku #: 35L7H1-1YV0V-B35B
M3.5 x 0.6 STI Plug Tap - High Speed SteelSpecial Price $21.98 Regular Price $31.30
Show / Hide Attribute Columns
Checkbox
SKU
Image
Stock
Product Type
ID Thread Rotation
Inside Thread
Decimal Outside Diameter
SKU | Image | Stock | Product Type | ID Th. Rotation | Inside Thread | Dec. OD | Price | Qty | ||
---|---|---|---|---|---|---|---|---|---|---|
35L7H1-1Z50V-C48V | 2-3 Days to ship | Bottoming Tap | Right-Hand | M48 x 5 | - | RFQ | + - |
|||
35L7H1-1Z50V-C16J | 2-3 Days to ship | Bottoming Tap | Right-Hand | M16 x 1.5 | - |
Special Price
$84.21
Regular Price
$119.93
|
+ - |
|||
35L7H1-1Z50V-B35B | 2-3 Days to ship | Bottoming Tap | Right-Hand | M3.5 x 0.6 | - |
Special Price
$21.98
Regular Price
$31.30
|
+ - |
|||
35L7H1-1YV0V-C48V | 2-3 Days to ship | Plug Tap | Right-Hand | M48 x 5 | - | RFQ | + - |
|||
35L7H1-21Z0V-C16J | 2-3 Days to ship | Plug Tap | Left-Hand | M16 x 1.5 | - |
Special Price
$161.51
Regular Price
$230.00
|
+ - |
|||
35L7H1-1YV0V-C16J | 2-3 Days to ship | Plug Tap | Right-Hand | M16 x 1.5 | - |
Special Price
$84.21
Regular Price
$119.93
|
+ - |
|||
35L7H1-1YV0V-B35B | 2-3 Days to ship | Plug Tap | Right-Hand | M3.5 x 0.6 | - |
Special Price
$21.98
Regular Price
$31.30
|
+ - |
- Inside Thread M3.5 x 0.6 Remove This Item
- Inside Thread M16 x 1.5 Remove This Item
- Inside Thread M48 x 5 Remove This Item
- Type
- ID Thread Rotation
- Inside Thread
-
- M2 x 0.4 2 items
- 2-56 2 items
- M2.2 x 0.45 2 items
- M2.5 x 0.45 2 items
- 3-48 2 items
- 3-56 2 items
- 4-40 2 items
- 4-48 2 items
- M3 x 0.5 2 items
- 1/8-40 1 item
- 5-40 2 items
- M3.5 x 0.6 2 items
- 6-32 2 items
- 6-40 2 items
- M4 x 0.7 2 items
- 8-32 2 items
- 8-36 2 items
- 3/16-24 1 item
- 10-24 2 items
- 10-32 2 items
- M5 x 0.8 2 items
- 12-24 2 items
- 12-28 2 items
- M6 x 1 3 items
- 1/4-20 5 items
- 1/4-26 1 item
- 1/4-28 3 items
- M7 x 1 2 items
- 5/16-18 4 items
- 5/16-22 1 item
- 5/16-24 3 items
- M8 x 1 3 items
- M8 x 1.25 3 items
- M9 x 1 2 items
- M9 x 1.25 2 items
- 3/8-16 4 items
- 3/8-20 1 item
- 3/8-24 3 items
- 1/8-28 1 item
- M10 x 1 2 items
- M10 x 1.25 3 items
- M10 x 1.5 3 items
- 1/8-27 1 item
- M11 x 1 2 items
- M11 x 1.25 2 items
- M11 x 1.5 2 items
- 7/16-14 4 items
- 7/16-18 1 item
- 7/16-20 3 items
- M12 x 1 2 items
- M12 x 1.25 3 items
- M12 x 1.5 2 items
- M12 x 1.75 3 items
- 1/2-12 1 item
- 1/2-13 3 items
- 1/2-16 1 item
- 1/2-20 3 items
- 1/4-19 1 item
- 1/4-18 1 item
- M14 x 1.25 2 items
- M14 x 1.5 3 items
- M14 x 2 3 items
- 9/16-12 2 items
- 9/16-18 3 items
- 5/8-11 4 items
- 5/8-14 2 items
- 5/8-18 3 items
- M16 x 1.5 3 items
- M16 x 2 3 items
- 3/8-19 1 item
- 3/8-18 1 item
- M18 x 1.5 3 items
- M18 x 2 2 items
- M18 x 2.5 3 items
- 3/4-10 4 items
- 3/4-12 1 item
- 3/4-16 3 items
- M20 x 1.5 3 items
- M20 x 2 2 items
- M20 x 2.5 3 items
- 1/2-14 2 items
- M22 x 1.5 3 items
- M22 x 2 2 items
- 7/8-11 1 item
- M22 x 2.5 2 items
- 7/8-14 4 items
- 7/8-18 1 item
- 7/8-9 4 items
- M24 x 1.5 2 items
- M24 x 2 3 items
- M24 x 3 3 items
- 1-10 1 item
- 1-14 3 items
- 1-12 2 items
- 1-8 4 items
- M26 x 1.5 2 items
- 3/4-14 2 items
- M27 x 1.5 2 items
- M27 x 2 2 items
- M27 x 3 2 items
- M28 x 1.5 2 items
- 1-1/8-12 2 items
- 1-1/8-7 2 items
- 1-1/8-8 2 items
- M30 x 1.5 2 items
- M30 x 2 2 items
- M30 x 3 2 items
- M30 x 3.5 2 items
- 1-1/4-12 2 items
- 1-1/4-7 2 items
- 1-1/4-8 2 items
- M33 x 2 2 items
- M33 x 3 2 items
- M33 x 3.5 2 items
- 1-11 1 item
- 1-11-1/2 1 item
- M34 x 1.5 2 items
- 1-3/8-12 2 items
- 1-3/8-6 2 items
- 1-3/8-8 2 items
- M36 x 1.5 2 items
- M36 x 2 2 items
- M36 x 3 2 items
- M36 x 4 2 items
- 1-1/2-12 2 items
- 1-1/2-6 2 items
- 1-1/2-8 2 items
- M39 x 3 2 items
- M39 x 4 2 items
- M42 x 3 2 items
- 1-5/8-8 2 items
- M42 x 4.5 2 items
- 1-1/4-11 1 item
- 1-3/4-8 2 items
- M45 x 2 2 items
- M45 x 4.5 2 items
- 1-7/8-8 2 items
- M48 x 3 2 items
- M48 x 5 2 items
- 2 in-8 2 items
- M52 x 3 2 items
- M52 x 5 2 items
- 2-1/8-8 2 items
- M54 x 3 2 items
- M56 x 3 2 items
- M56 x 4 2 items
- M56 x 5.5 2 items
- 2-1/4-8 2 items
- 2-3/8-8 2 items
- 2-1/2-8 2 items
- M64 x 3 2 items
- M64 x 4 2 items
- 2-5/8-8 2 items
- 2-3/4-8 2 items
- 2-7/8-8 2 items
- 3 in-8 2 items
- 3-1/8-8 2 items
- 3-1/4-8 2 items
- 3-3/8-8 2 items
- 3-1/2-8 2 items