Style M / Size 138 bobbins are typically used with topstitch threads that are size 207 and higher.
Size 138 - Style M bobbins are typically used on mid-sized and large commercial machines for sewing heavy fabric, canvas, upholstery, and leather. They are 0.435 inches (1.105 cm) high and 1.023 inches (2.598 cm) in diameter.
Information
Code Description Image Price Stock  
BOBM138BLAC072Ne Bobbins - Style M - Size 138 - Black (Eddington) - Nylon - Sideless - Box of 72 $37.00 29
BOBM138BLAC072Nf Bobbins - Style M - Size 138 - Black (Fil-Tec 14681) - Nylon - Sideless - Box of 72 $42.00 1
BOBM138BLAC072Pe Bobbins - Style M - Size 138 - Black (Eddington) - Polyester - Sideless - Box of 72 $37.00 16
BOBM138BLS6072Ns Bobbins - Style M - Size 138 - Carolina Blue (Coats) - Nylon - Paper Sides - Box of 72 $20.00 49
BOBM138GRG7144N Bobbins - Style M - Size 138 - Pea Green (Hemmingway) - Nylon - Box of 144 $20.00 17
BOBM138ORA1144Ng Bobbins - Style M - Size 138 - Orange - $1 An Oz - 10 Per Ounce $1.00  
BOBM138REDS072Pe Bobbins - Style M - Size 138 - Scarlet (Eddington) - Polyester - Sideless - Box of 72 $37.00 24
BOBM138WHIT072Ne Bobbins - Style M - Size 138 - White (Eddington) - Nylon - Sideless - Box of 72 $37.00 20
BOBM138YELN072 Bobbins - Style M - Size 138 - Lemon (Eddington) - Polyester - Sideless - Box of 72 $37.00 11