These are 1/4″ compression nuts with gripper and sleeve sold in a 5 pack.
Everbilt 1/4 in. Nylon Compression Sleeve Fittings (3-Pack) 800659
Monoprice 12/24 19mm Screw for Rack, 50 pcs, Carbon Steel, Black
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Price list – 1st March 2011 - Pegler
1/4 MPT Compression Fitting - American Dental Accessories, Inc.
Everbilt 1/4 in. Compression Sleeves and Brass Insert Fittings (2
1/2/5 Piece Straight 6AN Male Flare to 5/16 (OD 8mm) Tube Hose
✅Brief Description : You'll get 120pcs of 1/4 inches compression fittings including 50pcs compression sleeve ferrule, 50pcs Insert and 20pcs Nuts. ✅
120PCS 1/4 inch Compression Fittings Assortment kit -(1/4) 50 Brass Compression Sleeve Ferrule, 50 Insert & 20 nuts - used to connect lines for
2PK) Everbilt A-8 1/4 in. OD Brass Compression Sleeve and Insert