The National Institute of Standards and Technology (NIST) is seeking sources to provide hydrostatic testing and recharging of 300 five-pound CO2 fire extinguishers at its Gaithersburg, MD campus. Services must comply with NFPA 10 and OSHA 29 CFR 1910.157 regulations, including replacement of seals, O-rings, and pull pins. The contractor will be responsible for picking up and returning all extinguishers to the NIST campus. Responses are due by 11:00 AM ET on June 1, 2026, and questions must be submitted by May 21, 2026. No budget amount is specified in the description.