The best Hammer Union seals for high-pressure applications integrate NBR/HNBR elastomers with brass/SS backups, tailored for Fig. 602-2202 unions up to 20,000 psi. Vital for oil/gas drilling, fracking, and sour service, they ensure zero leaks via API 6A/NACE compliance. Material selection balances cost, temp (-40°F to 500°F), and RGD resistance. Innovations like nanocomposites and dig... https://globalsealstech.com/product/hammer-union-seal-2/