Hi William,
Thank you for reaching out and we hope you are in good health. We appreciate your interest in Samsung home appliances, specifically with Samsung - 6.0 cu. ft. Freestanding Gas Range with WiFi, No-Preheat Air Fry & Convection - Stainless steel.
The parts needed for the gas fitting can be found below.
a. Gas line shut-off valve.
b. Flexible metal appliance connector ½ in (ID) x 5 ft.
c. Flare union adapter ¾ in or ½ in (NPT) x ½ in (ID).
d. Flare union adapter ½ in (NPT) x ½ in (ID).
e. 135-degree elbow (optional).
f. Lag bolt or ½-in (OD) sleeve anchor.
I have shared the user manual link below. Please access the link and turn to pages 10, 15, 17 - 19 for the gas requirements.
https://downloadcenter.samsung.com/content/EM/202103/20210317173440561/Install_NX60A6_DG68-01337A-00_EN-MES-CFR_201230.pdf
Please feel free to communicate with us through the channels below if you have additional questions.
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Your reference number: 1144563849
Leo