Parker's stainless steel NPT adapters have working pressure ratings from 10,000 psi to 15,000 psi, depending on size.
adapter, 1/8 NPT hane, 1/8 NPT hona, 90 grader - Dalhems
Size: 3AN (3/8-24) male to 1/8 NPT thread Material: Manufactured from stainless steel 304 These AN to NPT stainless steel fittings are commonly used
Male 1/8 NPT to -3 AN Flare Adapter Straight Stainless Steel
1/8-27 NPT, Plated Steel Body/Metal Adapter/Nickel Plated Steel Sheath, Bayonet Adapter - 5ZY30
1CN/1DN Hydraulic Metric NPT Fitting China Wholesaler-Topa
M8 x 1.0 to 1/8 NPT Thread Adapter: Carbon Steel
IDEX U-500-01 Connector NPT Adapter Body PEEK 1/8″ OD - SciPro
M10 x 1 to 1/8 NPT Pressure Sensor Adapter - Motorsport Electronics Limited
01D9-8-8C - NPT Adapters
NPT threaded adapters
3/8 Quick Disconnect Adapter with 1/8 NPT Port
NW40 – Chemtech Scientific Incorporated
Diligent Defense Co. - Ti Direct Thread Adapter SIG Taper 5/8x24 TPI
Adapter 8890100 M38x1.5 f to NPT 1 m - JULABO USA
with Lifetime Warranty | Custom Build Your Gauge
Metric Adapter, 1/8 inch NPT to M10X1