DIN 7979D Internal Thread Dowel Pin | GCr15 Precision Extractable Locating Pin

Product overview

DIN7979D is German standard 1:50 taper locating pin with internal thread on both ends, made of GCr15 bearing steel, quenched and tempered to hardness 58~62HRC. Precision ground to bright natural finish and coated with anti-rust oil; transition R corner is smoothly rounded without visible tool marks. Double-side inner thread allows easy pulling out from either end, ideal for blind hole and through-hole high-precision positioning.

Material & Surface Treatment

Raw material selects premium GCr15 bearing steel, fully quenched and tempered with finished hardness ranging from 58HRC to 62HRC for high hardness, wear resistance and compression resistance. Outer diameter undergoes precision centerless grinding to retain original bright steel surface without plating or blackening. All finished pins are fully daubed with anti-rust oil for rust prevention during storage and transportation. Transition R arc is uniformly rounded and smooth, free of burr and obvious turning marks.

Features & Advantages

• Standard Compliance：Produced strictly per DIN7979D standard, fixed 1:50 taper, precise dimension tolerance and good interchangeability. • Double-End Thread：Internal thread on both sides, flexible disassembly from any end for special hole structure. • High Hardness Wearproof：GCr15 with 58-62HRC heat treatment, outstanding wear resistance for long-term repeated positioning. • Fine Craft：Smooth transition R arc, ground surface free of visible tool marks. • Natural Anti-Rust：Bright ground finish matched with anti-rust oil coating for effective short-term rust protection.

Application

DIN7979D GCr15 hardened taper pins are widely used for high-precision mold, precision fixture, gearbox, hydraulic valve block, automation equipment and heavy machinery positioning, especially suitable for double blind hole and deep through-hole installation.