Information Topics

Monofilament Thread Buying Guide

Monofilament Thread Sizes

Specifications and Use by Size

Monofilament Thread Properties

Monofilament Spools and Canisters

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Monofilament Thread Buying Guide
Monofilament thread, also known as invisible nylon, is exactly what its name says - a thread that has a single filament. Monofilament thread is semi-translucent, and it is the first choice for sewing "invisible" stitches. The Monofilament Thread Buying Guide helps customers get the right thread for their needs. Our approach is to help you decide if monofilament thread is right for your needs, identify which sizes (thicknesses) should be used for common monofilament applications, and provide specifications for each size.

Our clear and smoke monofilament thread have a semi-translucent quality that helps them to blend in with the fabric that you are sewing. This makes monofilament thread an excellent choice for blind stitching, and making exposed stitches or seams as "invisible" as possible. It is also a good alternative if you cannot find a thread color that matches your fabric. Monofilament thread looks and feels like fishing line, but it is too prone to tangling on reels. Monofilament thread goes up to 0.012 inches, whereas fishing line usually starts at 0.013 inches. For best results, use clear monofilament with light colors and smoke monofilament with dark colors.

Monofilament Thread Sizes
Size refers to thread thickness - not the amount of thread on a spool or canister. Our monofilament thread sizes range from almost hair thin and delicate, to thread that is strong enough for upholsery. As thickness increases, the thread's strength increases, it becomes more visible, and the yards-per-ounce decrease. Sizes 003 to 011 can be used with most home sewing machines. Size .012 normally requires a commercial machine.

Specifications and Use by Size
Monofilament sizes are usually designated in thousanths decimal inches. For example, a size .003 is 3 one thousanths of an inch.
Monofilament - Size .003
Tex Equivalent: Tex 5
Average Thickness
Inches: 3/1000" (0.003 In.)
Millimeters: 0.08
Average Strength
Pounds: 0.8
Kilograms: 0.36
Use Needle Sizes
50/6 to 55/7
Uses
Invisible seams
 
Monofilament - Size .004
Tex Equivalent: Tex 8
Average Thickness
Inches: 4/1000" (0.004 In.)
Millimeters: 0.10
Average Strength
Pounds: 1.3
Kilograms: 0.59
Use Needle Sizes
55/7 to 65/9
Uses
Hair wraps
Invisible seams
Quilting
 
Monofilament - Size .005
Tex Equivalent: Tex 14
Average Thickness
Inches: 5/1000" (0.005 In.)
Millimeters: 0.12
Average Strength
Pounds: 1.8
Kilograms: 0.82
Use Needle Sizes
65/9 to 70/10
Uses
Hair wraps
Invisible seams
Quilting
 
Monofilament - Size .006
Tex Equivalent: Tex 18
Average Thickness
Inches: 6/1000" (0.006 In.)
Millimeters: 0.15
Average Strength
Pounds: 2.6
Kilograms: 1.18
Use Needle Sizes
70/10 to 80/12
Uses
Applique
Garments
Hair wraps
Quilting
 
Monofilament - Size .007
Tex Equivalent: Tex 27
Average Thickness
Inches: 7/1000" (0.007 In.)
Millimeters: 0.18
Average Strength
Pounds: 3.7
Kilograms: 1.68
Use Needle Sizes
75/11 to 80/12
Uses
Applique
Garments
Quilting
 40 Weight Embroidery Thread, 40 Weight Cotton Thread, and Maxi-Lock Sewing Thread are also Tex 27.
 
Monofilament - Size .008
Tex Equivalent: Tex 35
Average Thickness
Inches: 8/1000" (0.008 In.)
Millimeters: 0.20
Average Strength
Pounds: 4.6
Kilograms: 2.09
Use Needle Sizes
80/12 to 90/14
Uses
Applique
Garments
Quilting
 
Monofilament - Size .009
Tex Equivalent: Tex 45
Average Thickness
Inches: 9/1000" (0.009 In.)
Millimeters: 0.23
Average Strength
Pounds: 5.7
Kilograms: 2.60
Use Needle Sizes
90/14 to 100/16
Uses
Applique
Drapes
Garments
Quilting
 
Monofilament - Size .010
Tex Equivalent: Tex 50
Average Thickness
Inches: 10/1000" (0.010 In.)
Millimeters: 0.25
Average Strength
Pounds: 7.0
Kilograms: 3.18
Use Needle Sizes
100/16 to 110/18
Uses
Applique
Drapes
Upholstery
 
Monofilament - Size .011
Tex Equivalent: Tex 60
Average Thickness
Inches: 11/1000" (0.011 In.)
Millimeters: 0.28
Average Strength
Pounds: 8.7
Kilograms: 3.95
Use Needle Sizes
110/18 to 120/19
Uses
Applique
Drapes
Leather
Upholstery
 
Monofilament - Size .012
Tex Equivalent: Tex 80
Average Thickness
Inches: 12/1000" (0.012 In.)
Millimeters: 0.30
Average Strength
Pounds: 9.5
Kilograms: 4.31
Use Needle Sizes
120/19 to 125/20
Uses
Applique
Drapes
Leather
Upholstery
Monofilament Thread Properties
Elongation - Monofilament thread has an average stretch of around 31% over time. This is beneficial for its end use, because it allows for the seams to stretch with the fabric, allowing for 'breaking in'. For activewear and lighter materials, Woolly Nylon thread has a greater stretch. Kevlar Thread has about a 2% stretch.

Heat - Monofilament thread can usually handle continuous heat up to 285F (140C) before breaking down. Its melting point is 509F (265C).

Abrasion - Monofilament thread has excellent abrasion resistance.

Chemicals - Monofilament thread has good resistance to bleaches, solvents, acids, and Alkalis.
Monofilament Spools and Canisters
Our monofilament thread is mostly sold on large canisters and smaller king spools. The standard monofilament canisters without tops (domes) are usually 5.25 inches at the base, and stand about 7.0 inches tall. The monofilament king spools average 2.50 inches at the base, and stand about 4.50 inches tall.

Exceptions - In the ultra thin size .004 monofilament only, we have mini spools available that are 1.25 inches at the base, and stand about 2.25 inches tall. In size .006, we have canisters on closeout that are 6.0 inches at the base, and stand about 6.50 inches tall.

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