Ace Glass 5805-20 Michel‑Miller Coupling with 316 Stainless Steel Liner, #15 to 15 Ace‑Thred

Precision made PTFE coupling with 316 stainless steel liner for connecting Michel-Miller, or Ace Glass 5820 columns when packing. Designed to make a leak-tight seal without the use of O-Rings. Simply tighten until white ring appears indicating a seal has been made, then secure locknut; no need to tighten further. Male thred is size designation and matches thred size of columns.