American Double End Brass Key

$2.50

Choose from 16 sizes. Please measure the width of your winding post in millimeters to insure you order the correct size.

**QUANTITY DISCOUNTS ARE AVAILABLE FOR THIS ITEM. PLEASE SEE THE TABLE BELOW.**

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Bulk deal
Quantity Discount Discounted price
12 + $0.50 $2.00

Discounts will be applied in your shopping cart.

Choose from 16 sizes. Please measure the width of your winding post in millimeters to insure you order the correct size.

Weight .037 lbs
Choose A Size

#4/1 (3.2mm/0), #4/3 (3.2mm/000), #4/5 (3.2mm/00000), #5/1 (3.4mm/0), #5/3 (3.4mm/000), #5/5 (3.4mm/00000), #6/1 (3.6mm/0), #6/3 (3.6mm/000), #6/4 (3.6mm/0000), #6/5 (3.6mm/00000), #7/1 (3.8mm/0), #7/3 (3.8mm/000), #7/5 (3.8mm/00000), #8/1 (4.0mm/0), #8/3 (4.0mm/000), #8/5 (4.0mm/00000)

Key Sizing Chart

Key No.American SizesSwiss SizesWatch Sizes
#000001.6mm1.25mm
#00001.8mm1.50mm
#0002.0mm1.75mm
#002.2mm2.00mm2.00mm
#02.4mm2.25mm1.90mm
#12.6mm2.50mm1.80mm
#22.8mm2.75mm1.75mm
#33.0mm3.00mm1.65mm
#43.2mm3.25mm1.60mm
#53.4mm3.50mm1.50mm
#63.6mm3.75mm1.40mm
#73.8mm4.00mm1.30mm
#84.0mm4.25mm1.20mm
#94.2mm4.50mm1.15mm
#104.4mm4.75mm1.05mm
#114.6mm5.00mm1.00mm
#124.8mm5.25mm.95mm
#135.0mm5.50mm
#145.2mm5.75mm
#155.4mm6.00mm
#165.6mm6.25mm
#175.8mm6.50mm
#186.0mm6.75mm
#196.2mm7.00mm
#206.4mm7.25mm
#216.6mm7.50mm
#226.8mm7.75mm
#237.0mm8.00mm
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