Flangeless Fitting Natural, PEEK, 1/4-28 Flat-Bottom, for 1/16" OD
Tubing Adapter 1/4-28 female (flat-bottom), 10-32 male (standard) | Sigma-Aldrich
Upchurch Scientific Tefzel ETFE Union Assembly for 1/16 inch OD Tubing, 0.93 µL, 1/4-28 Flat-Bottom, 0.75 mm Thru-hole, Single - P-710 - £22.17 : UVISON.com
Flangeless Fitting Natural, Polypropylene,1/4-28 Flat-Bottom, for 1/16" OD - Biotech
Flangeless Nut Short, PEEK 1/4-28 Flat-Bottom, for 1/8" OD Natural | Chromatography Direct
P-316 - Plug PTFE 1/4-28 flat-bottom - Chrom Tech, Inc.