acronym finder: 3bsd stands for three bearing swivel duct ... suggest new definition. this definition appears very rarely and is found in the following acronym finder categories:

acronym finder: 3bsm stands for 3 bearing swivel module (joint strike fighter) ... what does 3bsm stand for? 3 bearing swivel module (joint strike fighter)

style #145f flat 51 ball bearing deluxe swivel with memory return for chairs and bar stools with backs. left and right 90° with strong positive stops.