DIN Standard M2 Steel Gas Release Straight Core Pins Flat-Sided

These flat-sided gas release core pins are used in injection mold tooling where controlled venting is needed through the core pin itself while maintaining exact core alignment. The flat-sided anti-rotation head helps prevent unwanted pin rotation during repeated closure cycles, supporting consistent vent path performance.

Common scenarios include automotive connector and housing molds, where trapped air behind thin ribs can cause splay or burn marks. The gas-release profile (single flat cutting or four flats cutting) improves venting effectiveness while the quenched M2 hardening steel improves dimensional stability under core-pin load.

They are also suitable for consumer and appliance components with fine surface features, where vent consistency affects surface finish. For multi-cavity molds that require predictable part-to-part alignment, the specified L dimension tolerances (+0.02/0 or +0.01/0) support accurate engagement and repeatable core seating.

• Flat-sided head for stable anti-rotation positioning
• Gas-release cutting geometry for reliable venting
• Quenched hardening steel durability for long production runs

The core pins are specified in M2 steel, a quenched hardening steel commonly selected for mold core components requiring strong wear resistance. After machining, they are manufactured with a quench-hardening heat treatment to achieve a hard, wear-resistant surface suitable for sliding and contact conditions around the core pin.

In service, the quenched condition improves wear resistance for repeated venting and loading, but it typically reduces impact toughness versus lower-alloy or softer conditions. Proper design of pin diameter and vent geometry helps manage stress concentrations at the cutting edges.

• Heat treatment state: quenched hardening steel (M2)
• Hardness: hardness target is not provided in the input data (select heat-treatment to meet your wear/toughness requirement)
• Wear vs. toughness trade-off: higher hardness for wear, with careful consideration for brittle-edge risk

If comparing options, you would generally select M2 for higher abrasive/adhesive wear resistance, while alternative steels with different tempering strategies may be chosen when maximum toughness is prioritized; however, only M2 is specified here.

Selection is driven by matching the pin’s shaft diameter (D/P) and length (L) to the mold’s core support, bushings, and the required vent reach. Choose D/P (Shaft diameter) in the 0.5 ~ 13 mm range and confirm that the corresponding nominal diameter 0.6 ~ 13 mm aligns with your core pin hole specification.

Verify length first: available L dimensions are 15 ~ 60 mm, 15 ~ 100 mm, and 15 ~ 120 mm. The L tolerance is specified as +0.02/0 or +0.01/0, meaning the pin length may be slightly above nominal but not below; therefore, check your stack-up so that the slightly positive tolerance does not interfere with seating depth.

• Shaft diameter tolerance: 0/-0.005 or -0.01/-0.02 (select the fit for your bushing/core-pin bore)
• Facet cutting depth (E): fixed at 0.02 ~ 0.05 mm for the vent geometry
• Gas release shape: choose single flat cutting or four flats cutting based on venting demand

Finally, ensure the flat-sided anti-rotation head matches your anti-rotation feature geometry so positioning remains stable over the full production cycle.