Gast
AT780B
COUNTER WEIGHT
Manufacturer’s part number
Where to get it
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As printed in the source
15 | AT780B | COUNTER WEIGHT | 1 (read by Claude, checked against the page)
Fits 40 models
As listed by GastWhen ordering, give the model and serial number from the nameplate: some parts changed within a model’s life.
In the manufacturer’s drawings
- Position 15 · Model 1HAB - Exploded ViewO&M Manual: PISTON_70-2100_M-13.pdf, p. 14
Part number, name and fitment as published by Gast (source), retrieved 2026-10-20. Vac & Air is independent and not affiliated with the manufacturers shown; names and numbers identify the parts only.