Style U bobbins are typically used with heavy duty commercial machines for sewing thick fabric, upholstery and leather.
https://www.thethreadexchange.com/miva/graphics/00000001/style-u-bobbins-dollar-coins-top-view.jpg Style U bobbins are typically used with heavy duty commercial machines for sewing thick fabric, upholstery, and leather. Its diameter is about the same as the less common Sacagawea Dollar coin, and its height is just shy of 6 Sacagawea coins stacked.
Dimensions
Diameter: 1-3/16" (1.181 In.), 3.00 cm
Height: 29/64" (0.457 In.), 1.16 cm

Information
Bobbin Buying Guide
Machine / Style Reference
Bobbin Style Guide - PDF

Code Description Image Price Stock  
BOBU046BLUL144Na Bobbins - Style U - Size 46 - Lucerne Blue - Nylon - Sideless - Box of 144
Half Price - Box may be battered
$21.10 5
BOBU046WHIT144Na Bobbins - Style U - Size 46 - White (A&E) - Nylon - Sideless - Box of 144 $42.10 11
BOBU069BLAC072Ne Bobbins - Style U - Size 69 - Black (Eddington) - Nylon - Sideless - Box of 72 $44.20 10
BOBU069BLAC072Pe Bobbins - Style U - Size 69 - Black (Eddington) - Polyester - Sideless - Box of 72 $42.10 4
BOBU069WHIT072Ne Bobbins - Style U - Size 69 - White (Eddington) - Nylon - Sideless - Box of 72 $44.20 18
BOBU069WHIT072Pe Bobbins - Style U - Size 69 - White (Eddington) - Polyester - Sideless - Box of 72 $44.20 5
BOBU069WHIT144Psa Bobbins - Style U - Size 69 - White - Nylon - Paper Sides - Box of 144 $84.10 9
BOBU092ODRA072Ps Bobbins - Style U - Size 92 - Olive Drab (A&E) - Polyester - Paper Sides - Box of 72 $37.30 24
BOBU092ODRA072Psx10 Bobbins - Style U - Size 92 - Olive Drab (A&E) - Polyester - Paper Sides - 10 Boxes of 72 $333.30 7
BOBU092WHIT072Pe Bobbins - Style U - Size 92 - White (Eddington) - Polyester - Sideless - Box of 72 $44.20 29
BOBU138BLAC072Pe Bobbins - Style U - Size 138 - Black (Eddington) - Polyester - Sideless - Box of 72 $44.20 1
BOBU138WHIT072Pe Bobbins - Style U - Size 138 - White (Eddington) - Polyester - Sideless - Box of 72 $44.20 21
BOBU138WHIT144Na Bobbins - Style U - Size 138 - White (A&E) - Nylon - Sideless - Box of 144 $94.60 5
BOBU138WHIT144Nt Bobbins - Style U - Size 138 - White (Service Thread) - Nylon - Sideless - Box of 144 $94.60 11
BOBU138WHIT144Pt Bobbins - Style U - Size 138 - White (Service Thread) - Polyester - Sideless - Box of 144 $94.60 1