Support Pillars Counterbore Through Bolt Hole (HN)

These support pillars are used in injection mold tooling whenever rigid, repeatable positioning is required around a through-bolt fastener. In leader-ejector space designs, they help maintain stack-up accuracy by providing stable anchoring during press start/stop and repeated machine cycles.

Common scenarios include automotive connector and relay housing molds, where alignment between plate sets and guide interfaces must resist vibration and assembly-induced variation. The through bolt hole (HN) is suitable because it enables consistent clamping force without a separate counterbore interface.

They’re also well matched for medical device housings and fine-feature molds that rely on tight positional control for ejector/leader-related assemblies. Multiple configurable lengths (L and LC ranges) allow the pillar to match the mold’s mounting geometry while keeping the bolt path straight for reliable assembly.

• Best for jigs, fixtures, and support assemblies requiring repeatable alignment
• Through-bolt retention improves structural stability during operation

The provided product data does not specify a steel grade, heat-treatment state, hardness (HRC), or coating. As a result, material-property claims (e.g., wear resistance vs. toughness trade-offs) cannot be stated from the current specification set.

For engineering selection, confirm the supplier’s material grade and heat treatment for the actual part you will receive. If your application involves high wear from bolt interfaces or frequent disassembly, request details on any surface hardening (such as nitriding), quench-and-temper targets, and specified HRC.

• Check whether the part is pre-hardened or quenched & tempered before use
• Verify any bolt-hole surface treatment that affects galling and wear
• Compare alternative grades only when the datasheet lists hardness and treatment parameters