This part is compatible with many tools including the models listed below: Porter Cable FC350A-Type-1 3 1/2 inch Clipped-Head Framing Air Nailer Porter Cable FC350A-Type-2 3 1/2 inch Clipped-Head Framing Air Nailer Porter Cable FM350A-Type-1 Air Nailer Porter Cable FR350A 3 1/2 inch Round-Head Framing Air Nailer
Practicality
Your porter cable air nailer collar has been loosen,the nailer can't work,just replace this part of the small parts,no need to replace the whole nailer,which can save you more energy and earnings.