4S12CTA12 Aeroquip by Danfoss | 4 Wire 4S CAT Flange 45° Elbow (CTA) Crimp Fitting | -12 CAT Flange x -12 Hose Barb | Steel Polished 45 deg. Weld Elbows - B2WK or 316 stainless steel bar

or 316 stainless steel bar stock

in this case C for Buna-N or N for High Temperature Buna-N

the couplings are crimp only

400 psi 800 bar 11

4S12CTA12 Aeroquip by Danfoss | 4 Wire 4S CAT Flange 45° Elbow (CTA) Crimp Fitting | -12 CAT Flange x -12 Hose Barb | Steel Polished 45 deg. Weld Elbows - B2WK or 316 stainless steel barTechnical Info: Crimp Fitting Socket Data. PDF Steel Part Number Terminal End Hose Size Flange Head Diameter K A D E&Oslash H Dash Size DN Dash Size 4S12CTA12 12 19 12 1. 63" 4. 63" 3. 21" 0. 56" 1. 22" 4S16CTA12 16 19 12 1. 87" 5. 17" 3. 74" 0. 56" 1. 39" 4S16CTA16 16 25 16 1. 87" 5. 29" 3. 72" 0. 76" 1. 39" 4S20CTA16 20 25 16 2. 13" 6. 02" 4. 46" 0. 76" 1. 65" 4S20CTA20 20 31 20 2. 13" 6. 67" 4. 50" 0. 99" 1. 65" 4S24CTA24 24 38 24 2. 50" 8. 47" 5.