Mark Dry and Steph Twell confirmed their World Championships places on a good weekend for Scottish athletes.
Dry, 27, a Commonwealth Games bronze medallist last year, threw his second qualification mark in the hammer, reaching 76.56m at Loughborough.
Twell, 25, the British 5000m champion, comfortably made her second qualifying time in Heusden.
Chris O'Hare, also running in Belgium, set a personal best of three minutes 34.82 with victory in his 1500m heat.
The 24-year-old European bronze medallist will aim to seal his place in Beijing next month with a second standard at the London Anniversary Games next weekend.
Laura Muir set the tone for her compatriots by smashing her own Scottish 1500m record in Monaco on Friday.
Finishing fifth in the Diamond League behind a new world record by Ethiopia's Genzebe Dibaba, the 22-year-old ran 3:58.66.
Muir is now second on the all-time British list to 2004 Olympic champion Dame Kelly Holmes.