Carmex 16ER20ABUTP30 Threading Insert 20 Tpi Buttress

Product Description

The CARMEX 16ER20ABUTP30 is a solid carbide laydown threading insert designed for cutting right-hand external American Buttress threads at 20 threads per inch (TPI). Manufactured in the P30 grade (material grade C5), this uncoated insert delivers consistent thread geometry on steel and similar materials in production turning operations. With a 3/8-inch inscribed circle and a thickness of 0.146 inches, it seats securely in compatible ER-style toolholders. Machinists and toolroom operators use this insert in CNC lathes and manual turning centers where precision Buttress thread profiles are required.

This insert is suited for external threading applications on components that require American Buttress thread forms, commonly found in industries such as aerospace, oil and gas, and heavy equipment manufacturing. The 16 ER insert style fits standard ER-series laydown threading toolholders. The P30 carbide grade is a general-purpose choice for steel cutting at moderate speeds and feeds, making it appropriate for both roughing and finishing passes depending on setup conditions.

Key Features

• Solid carbide construction in P30 grade (C5 material grade) for durability in steel threading
• American Buttress external thread form at 20 TPI for precise profile accuracy
• Uncoated finish - ready for use as supplied, compatible with cutting fluids
• Right-hand cut orientation for standard lathe threading operations
• 3/8-inch inscribed circle with 0.146-inch thickness for stable seating in 16 ER toolholders
• Relief angle of 0 degrees for flush laydown-style insert geometry

Compatibility

Designed for use in 16 ER-style laydown threading toolholders that accept inserts with a 3/8-inch inscribed circle. Verify toolholder pocket specifications before installation to confirm proper seating and clamping.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine before changing inserts. Seat the insert fully in the toolholder pocket and torque the clamping screw to the toolholder manufacturer's specification using the appropriate Torx or hex key. Inspect the insert seat and clamp for wear or debris before each use to ensure consistent thread quality.