28C

Union Special 28C Screw
This part is contained in the following machines. This list is not exhaustive.

Machine: 2200 Series - Portable Bag Closing Machines
Manual: https://union-special.com/wp-content/uploads/2022/09/G283-GR-9-13-2022_USA_2200.pdf
Page: see p.25

Machine: 81200 Series - Bag Sewing Machines
Manual: https://union-special.com/wp-content/uploads/2022/11/230-I-GR-3-18-2015_USA_80200.pdf
Page: see p.31

Machine: 80700 Series - Container Bag Sewing Machines
Manual: https://union-special.com/wp-content/uploads/2022/11/PT0502-GR-3-01-2022-USA-80700C3_C4_CD4.pdf
Page: see p.37