SINGER 401A - Manual (Page 7)

FABRIC, THREAD, NEEDLE AND STITCH LENGTH CHART
TYPES OF FABRICS
THREAD
SIZES
NEEDLE
SIZES
MACHINE STITCH SETTINGS
FOR STRAIGHT SEWING
INSIDE
SEAMS
TOP
STITCHING
Filmy materials comparable to Net, Marquisette, Chiffon,
Silk and Chiffon Velvets, Voiles, Ninon
50 Embroidery
100 Cotton
Synthetic Thread
9 15 to 20 15 to 20
Sheer materials comparable to Lawn, Dimity, Synthetic
Sheers, Paper Taffetas, Pure Silks, Gossamer Silks, Silk or
Synthetic Tricots, Synthetic Velvets, Satins 50 Embroidery
80 to 100 Cotton
Synthetic Thread
11 12 to 15 15 to 20
Lightweight materials comparable to Gingham, Cham-
bray. Pique, Poplin, Percale, Cretonne, Chintz, Faille,
Bengaline, Wool Flannel, Wool Jersey, Wool Crepe,
Cotton Velvets and Velveteens, Lightweight Suitings
50 Mercerized
60 to 80 Cotton
A Silk
14
or
16
12 15 to 18
Medium heavy materials comparable to Corduroy, Crash,
Gabardine, Rep, Heavy Suitings and Coatings
Heavy Duty Mer.
40 to 60 Cotton
Synthetic Thread
16 10 12
Heavy materials comparable to Sailcloth, Denim, Ticking,
Overcoatings 30 to 40 Cotton
Thread
18 8 10
Plastic Materials
50 Embroidery
Synthetic Thread
50 Mercerized
11 or 14 10 12
When ordering needles, always specify ''Class and Variety 15 x 1" and state the size and quantity required.