Fox ruled Monday among young adults as ”Hell’s Kitchen” and ”MasterChef” showed week-to-week gains and delivered the net’s best summer numbers on the night in four years. ABC’s ”The Bachelorette” also was on the rise, while hockey’s Stanley Cup Finals on NBC finished with its best numbers of the series.

According to preliminary national estimates from Nielsen, ‘Hell’s Kitchen” was the night’s No. 1 program among young adults (2.7/9 in 18-49, 6.2 million viewers overall), closely followed by ”MasterChef” (2.6/7 in 18-49, 5.8 million viewers overall), with both shows up three-tenths of a ratings point week to week.

At NBC, the sixth and final game of the Stanley Cup Finals between the Los Angeles Kings and New Jersey Devils averaged a 1.6/5 in 18-49 and 4.1 million viewers overall on the network’s affiliates from 8 to 11, with the numbers expected to rise some in the nationals; the previous high in the series was Saturday’s Game 5 (1.1/4 in 18-49, 3.33 million viewers overall). In metered-market overnights, the Kings’ 6-1 victory averaged a 4.0 household rating/7 share , slightly above last year’s Game 6 between Boston and Vancouver (3.9/6).

ABC’s ”The Bachelorette” (2.3/7 in 18-49, 7.3 million viewers overall) edged up for a second straight week, placing second to Fox in 18-49 while leading from 8 to 10 p.m. in key female demos as well as total viewers. It was followed by a repeat ”Castle” (1.1/3 in 18-49, 5.1 million viewers overall).

CBS aired repeats of Monday regulars ”How I Met Your Mother” (1.3/4 in 18-49, 4.9 million viewers overall), ”2 Broke Girls” (1.5/4 in 18-49, 5.5 million viewers overall), ”Two and a Half Men” (1.5/4 in 18-49, 5.5 million viewers overall), ”Mike and Molly” (1.4/4 in 18-49, 5.8 million viewers overall) and ”Hawaii Five-0” (1.2/3 in 18-49, 5.7 million viewers overall).

Preliminary 18-49 averages for the night: Fox, 2.7/8; ABC, 1.9/5; NBC, 1.6/5; CBS, 1.4/4; Univision, 1.2/3; CW, 0.2/1.

In total viewers: ABC, 6.6 million; Fox, 6.0 million; CBS, 5.7 million; NBC, 4.2 million; Univision, 3.2 million; CW, 0.6 million.