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HELI-COIL General Purpose STI Tap, 7/8"-9 UNC, H5/2B, Plug Chamfer, 4 Flutes - General Purpose STI Taps
HELI-COILGeneral Purpose STI Taps

HELI-COIL General Purpose STI Tap, 7/8"-9 UNC, H5/2B, Plug Chamfer, 4 Flutes

The HELI-COIL Screw Thread Insert STI Tap (Straight Flute, MPN 18187-14) is a general-purpose STI tap for 7/8"-9 UNC threads, with H5 / 2B tolerance, 4 flutes, and a plug chamfer. 3G Electric interprets your demand…

SKU 3G-OTH-262101

Also listed as: 1818714 · 18187 14

Brand
HELI-COIL
Item
General Purpose STI Tap, 7/8"-9 UNC, H5/2B, Plug Chamfer, 4 Flutes
Category
General Purpose STI Taps
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

HELI-COIL
Manufacturer Part Number
18187-14
Type
H5 / 2B, Plug Chamfer
Flute
4
UNC
7/8"-9

Technical Documents

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Screw Thread Insert STI Tap (Straight Flute, MPN 18187-14) is a general-purpose STI tap for 7/8"-9 UNC threads, with H5 / 2B tolerance, 4 flutes, and a plug chamfer. 3G Electric interprets your demand for this OEM-specified tool and delivers it across 14 industrial departments — with specialist depth in combustion, pumps and controls as a trust anchor.

Frequently Asked Questions

What is the HELI-COIL Screw Thread Insert STI Tap used for?

This HELI-COIL STI tap is used to cut internal threads for installing HELI-COIL screw thread inserts. It is designed for general-purpose thread repair and reinforcement in metal components, commonly used in automotive, aerospace, and industrial maintenance applications.

What are the specifications of the HELI-COIL STI Tap 18187-14?

The HELI-COIL STI Tap has a 7/8"-9 UNC thread size, H5/2B tolerance, straight flute design with 4 flutes, and a plug chamfer. It is a general-purpose tap for creating threads that accept HELI-COIL inserts. The manufacturer part number is 18187-14.

Where to buy HELI-COIL STI Tap 18187-14 worldwide?

You can source the HELI-COIL STI Tap 18187-14 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to select the correct HELI-COIL STI Tap for thread repair?

Select a HELI-COIL STI tap that matches the thread size and pitch of the insert you plan to install. For the 7/8"-9 UNC insert, use this tap with H5/2B tolerance. Ensure the tap chamfer type (plug, bottoming, or taper) suits your hole depth. Always follow HELI-COIL installation guidelines.

Used in

Common applications for HELI-COIL
Aerospace engine repair — HELI-COIL STI taps for M12x1.75 metric threads in aluminum alloy components
Automotive transmission rebuild — HELI-COIL STI taps for 7/16-14 UNC threads in cast iron housings
Industrial pump maintenance — HELI-COIL STI taps for #10-32 UNF threads in stainless steel pump bodies
Hydraulic cylinder repair — HELI-COIL STI taps for M6x1 metric threads in steel cylinder heads
General manufacturing — HELI-COIL STI taps for 9/16-18 UNF threads in machinery base plates

HELI-COIL Products

3G Electric supplies HELI-COIL general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This STI tap is designed for cutting internal threads to accept HELI-COIL screw thread inserts. It features a 1 1/8"-7 UNC thread size with H4 / 3B tolerance and a plug chamfer, with 4 straight flutes for chip evacuation. Used in metalworking applications for thread repair or reinforcement in components such as engine blocks and machinery housings
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