Time-Limited 12-28 HSS Left Hand Round Adjustable Die 1″ OD Uncoated (Bright) DWTH1-1228LH

This left-hand HSS round adjustable die is sized for thread size #12-28 with a 1 inch outer diameter. The uncoated (bright) body provides clear visibility for wear and chip clearance. Adjustment is achieved by a fine pitch screw that forces the sides apart or allows them to spring together. Chamfering is on both faces: one side uses a two-to-three thread chamfer for threading, the other side uses a one-to-one-and-a-half thread chamfer for threading close to a shoulder. The beveled slot accommodates use in a machine holder, and the adjusting screw can be removed to allow adjustment via the holder’s screws.

Specs

Thread size: #12-28

Handedness: Left-hand thread

Outer diameter: 1 inch

Material: High Speed Steel (HSS)

Finish: Uncoated (Bright)

Adjustment mechanism: Fine pitch screw to separate or bring sides together

Chamfer geometry: one end two-to-three thread chamfer; other end one-to-one-and-a-half thread chamfer

Type: Round adjustable die, chamfered on both faces

Features

High Speed Steel construction for improved wear life in threading applications

Left-hand threading capability for dedicated left-handed fasteners

Dual-face chamfer geometry supports starting and finishing threads in tight spaces

Fine pitch adjustment screw provides precise control over die opening

Beveled slot design enables adjustment in a machine holder; the adjusting screw can be removed to use holder screws for adjustment

Clear, bright finish aids inspection of chip clearance and wear

Physical

Shape: Round die

Finish: Uncoated (Bright)

Diameter specification: 1 inch outer diameter

Thread capability: #12-28 with left-hand orientation

Chamfer specifics: two-to-three thread chamfer on one face; one-to-one-and-a-half thread chamfer on the opposite face

Slot: Beveled to allow adjustment via machine holder screws after removing the adjusting screw