5-contact spring-loaded piston at 0.100" pitch
The 821-22-005-10-000101 is a 5-contact spring-loaded piston connector from Mill-Max's 821 series, built for through-hole mounting in a single-row layout. Contacts are copper alloy with 20.0µin (0.51µm) gold finish, and the 0.100" (2.54 mm) pitch matches standard breadboard and prototyping grids.
Pitch and contact count for board fit
The 5-position single-row layout at 0.100" (2.54 mm) pitch occupies 0.500" of board edge — the same pitch used across the 821 series, so the footprint scales linearly with contact count.