Helicoil
Helicoil 4687-16 M16x2.00 Straight Flute Hand Tap 4 Flute
M16×2.00 metric coarse STI tap, 107.95 mm overall, 50.80 mm thread length, H3 limit, four-flute high-speed steel, uncoated, plug chamfer
- TypeHole, Drill, Bore & Wire Gauges
- M16x2.00 metric coarse thread cuts cleanly
- Four-flute design removes chips efficiently
- Plug chamfer starts threads easily in through-holes
- High-speed steel resists wear during repeated use
- 95 mm overall length reaches deep holes
Thread Repair Tap M16x2.00
The Helicoil 4687-16 is a straight flute hand tap designed for M16x2.00 metric coarse threads. It creates internal threads to accept screw thread inserts for damaged hole repair. Made from high speed steel with a bright uncoated finish, it features a right-hand thread direction and H3 thread limit. The plug chamfer aids starting in through holes.
Mechanics Restoring Stripped Threads
This tap suits technicians repairing stripped or damaged threads in automotive and industrial components. The four-flute design provides chip clearance for hand operation. It is not for creating new threads in untapped holes without inserts. Buyers needing taps for different thread sizes or spiral flute geometry for blind holes should look elsewhere.
Requires Matching Inserts And Drill Size
The tap prepares holes for Helicoil screw thread inserts, so matching inserts must be purchased separately. A correct drill size is needed before tapping to the 50.80 mm thread length. The 107.95 mm overall length fits standard tap wrenches. No lubricant or guide is included with the tap itself.
Highlights
- M16x2.00 metric coarse thread cuts cleanly
- Four-flute design removes chips efficiently
- Plug chamfer starts threads easily in through-holes
- High-speed steel resists wear during repeated use
- 95 mm overall length reaches deep holes
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
What M16x2.00 size drill bit is required before using this 4687-16 tap?
Drill a hole to the M16x2.00 thread specification before tapping; the tap then cuts the internal threads for a Helicoil insert.
Will this M16x2.00 tap work with standard coarse-pitch bolts already in my toolkit?
Yes, it cuts a standard metric coarse thread so existing M16x2.00 bolts will engage correctly.
How do I verify the 50.80 mm thread length is cut correctly after setup?
Measure the tapped depth; it should reach 50.80 mm with clean, full-form threads for the insert.
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