JBF National U series sprue bushings come hardened and ground, and feature a 43/45 RC through hardness.
Unit of Measure

Dimensions

Dimension T

N/A 3-25/32 in

Dimension B

N/A 2-29/32 in

Dimension E

N/A 5/32 in

Dimension R

N/A 1/2 in

Technical Specs

Brands

N/A JBF National

Hardness

N/A 43/45 Rockwell C

Drawings

N/A