SINGER 107W17 - Manual (Page 2)

INSTRUCTIONS FOR ORDERING
In ordering from this list, use ONLY the PART number in the FIRST
column.
The number stamped on a Sewing Machine Part is the number of the
Single Part only, except when the part includes Set Screws, Clamping Screws,
Studs and Rollers Spun on. Small Wires riveted, or Parts soldered together,
etc. , which it is necessary to furnish in combination.
Every combination of parts sent out has its specific number which,
although not stamped on Parts (except in above case) must be used when
ordering the combination.
Each number always indicates the SAME PART in whatever list it appears,
or for whatever Machine.
The letters after some of the numbers indicate the style of finish only, as
follows;
A Hardened, Polished, Nickel Plated and Buffed.
AL Heat Treated for Toughness.
ALX Heat Treated for Toughness and Black Oxide.
B Polished, Nickel Plated and Buffed.
C Hardened only.
D Polished only.
E Soft, Not polished.
F Hardened and Polished.
J Nickel Plated only.
R Merlized
X Black Oxide, for Iron and Steel.
XC Hardened and Black Oxide, for Iron and Steel.
Y Black Nickel Plated only.
Z Chromium Plated.
These letters MUST BE USED when they appear in the list and AFTER the
number, as in the list.
In this series:
I to 1500, 200001 to 201500 and 350001 to 351500 are Screw Numbers.
1501 to 1800,201501 to 201800 and 350501 to 351800 are Nut Numbers.
1801 to 2000,201801 to 202000 and 350801 to 352000 are Roller Numbers,
2001 to 50000 and 202001 to 350000 are Numbers of Machine Parts.
The figures in the second column refer only to the plate in which the
illustration of the part is hsown and are NOT TO BE USED in ordering.
These Plates are in Form 20500, Illustrations of Parts.
Parts marked with an asterisk (''=) are furnished only when repairs are
made at the factory.