The Hirose GT13SH-2/1P-R is a retainer accessory in the GT13 series, molded in gray polybutylene terephthalate (PBT) and packaged in bags. This is a secondary lock feature, not a primary latch: the retainer slides into the housing after the terminals are seated and clicks into place, giving the assembly a positive mechanical lock that the terminal lance alone does not provide.
Which GT13 housings does this retainer fit?
The GT13SH-2/1P-R is listed for use with GT13 housings that have 3 positions. That means it fits the 3-circuit receptacle or plug housings in the GT13 family, not the 2-position variants. The sibling retainers GT13SH-1/1P-R and GT13SH-1/1S-R are the correct parts for 2-position GT13 housings. If you are building a 3-circuit harness, this is the retainer that matches the cavity count.