Support rod with spherical rod end bearings as used in the lightweight seats of later Space Shuttle missions.
Part number SED39126820-701. Measured as length 13-1/4” center-to-center, .750” OD, .370 diameter holes in bearings.
NASA photo shows two similar support rods (at green arrows) on the Commander’s seat during STS-128.
Historic Space Systems at www.space1.com
Artifacts FOR SALE