Plumbing Supplies
5/16" SAE Female To 1/4" Male For R410a R22 Gauge Hose Vacuum Pump Adaptor
5/16" SAE Female To 1/4" Male For R410a R22 Gauge Hose Vacuum Pump Adaptor
https://www.bizrate.co.uk/plumbingsupplies/5-16-sae-female-to-1-4-oid29703076592.html