Cut Sheet

23
Product description
3M™ Heat Shrink Tubing NST provides
excellent cut-through and abrasion
resistance. It also is resistant to some
solvents and uids, including oil. The
tubing maintains exibility at low
temperatures and can be readily marked
by hot-stamp and print-wheel methods.
When heated in excess of 135°C (275°F)
NST tubing rapidly shrinks to a skintight
t. NST tubing is rated for continuous
operation from –70°C (–94°F) to 121°C
(250°F).
Typical applications
NST tubing is designed for applications
requiring a tough, highly exible
covering. It is particularly useful
for fabrication and repair of exible
harnesses and wire bundles and for
covering hydraulic couplings. Its
excellent mechanical properties and broad
operating temperature range make it an
ideal choice for jacketing cable harnesses
and custom-made cables that must operate
in severe environmental conditions.
Shrink ratio
NST tubing has a 2:1 shrink ratio.
When freely recovered, the tubing will
shrink to 50% of its as-supplied internal
diameter. The recovered wall thickness is
proportional to the degree of recovery.
Standard color
Black.
Standard packaging
Spools.
Ordering information
Order NST tubing by product name,
size equivalent to the expanded inside
diameter, package type and color. Always
order the largest size that will shrink
snugly over the component to be covered.
When ordering NST tubing, please
indicate the applicable specication
required. Example: NST tubing, 3/16",
spools, black.
3
Heat Shrink Tubing NST
Modied Chlorinated Polyolen (Neoprene); Shrink Ratio 2:1
Physical
Tensile Strength 2100 PSI
Ultimate Elongation 500%
Longitudinal Change +1, –10%
Specic Gravity 1.3
Operating Temperature –70°C to
Range +121°C
Shrink Temperature 135°C
(Min.) (275°F)
Low Temperature Flexibility
(4 hrs. @ –70°C) No cracking
Flammability Self-extinguish
Electrical
Dielectric Strength 800 V/mil
Volume Resistivity 10
12
ohm-cm
Chemical
Corrosion Resistance Non-
corrosive
Fuel & Oil Resistance Excellent
Solvent Resistance Good
Abrasion Resistance Excellent
Acids & Alkalis
Resistance Excellent
Typical PropertiesStandard Sizes and Dimensions
Technical information provided consists of typical product data and
should not be used for specication purposes. Unless otherwise
noted, all tests are performed at room temperature.
Recovered
Wall
Ordering Expanded I.D. Recovered I.D. Thickness
Size (Minimum) (Maximum) (Nominal)
in. in. (mm) in. (mm) in. (mm)
1/8 .125 (3,18) .062 (1,83) .030 (0,76)
3/16 .187 (4,75) .093 (2,69) .035 (0,89)
1/4 .250 (6,35) .125 (3,18) .035 (0,89)
3/8 .375 (9,53) .187 (4,75) .040 (1,02)
1/2 .500 (12,70) .250 (6,35) .048 (1,22)
5/8 .625 (15,88) .312 (7,92) .052 (1,32)
3/4 .750 (19,05) .375 (6,99) .057 (1,45)
7/8 .875 (22,23) .437 (11,10) .065 (1,65)
1 1.000 (25,40) .500 (12,70) .070 (1,78)
1-1/4 1.250 (31,75) .625 (15,54) .087 (2,21)
1-1/2 1.500 (38,10) .750 (19,05) .095 (2,41)
1-3/4 1.750 (44,45) .875 (22,23) .107 (2,72)
2 2.000 (50,80) 1.000 (25,40) .110 (2,79)
3 3.000 (75,20) 1.500 (38,10) .125 (3.18)
Applicable Specication
SAE-AMS-DTL-23053/1*, Class 1, 2; UL File
E-39100; CSA LR38227; SC-X-15112.
Note: Dimensions in inches are approximate.
* Formerly MIL+23053/1 and MIL-DTL-23053/1