Certifications and approvals - Underwriters Lab, Canadian Standards Association, Restriction of Hazardous Substances, and Mil Spec approvals

GMT-221 Polyolefin Flexible Shrink Tubing With a 2:1 Shrink Ratio

Flexible Polyolefin Milspec Qualified Flame Retardant Versatile Uses


GMT-221 provides optimal insulation for cable assemblies, wire harnesses, and wire connections. It is designed to provide resistance to abrasion, thermal heat, and fluids in demanding environments. It provides excellent protection for wire bundles and may be used for wire identification. JP-8 Fuel resistance and hydraulic fluid resistance.

Availability: Verify Availability Before Ordering

Description

Details

  • SHRINK RATIO 2:1
  • SAE-AMS-DTL-23053/5 CLASS 1, 2 (Clear) & 3
  • RoHS UL CERTIFIED E306685
  • cUL CERTIFIED
  • VW-1 FLAME TEST

GMT-221 Applications

  • General Purpose Insulation & Repair
  • Wire & Cable Harnessing & Bundling
  • Cable & Connector Protection
  • Spools Used in Automatic Cutting Machine

Key Features

Key Features

Characteristics

  • Operating Temperature: -45º to 135º Celsius
  • Shrink Temperature: 90º - 100º Celcius
  • Flame Retardant (Except Clear), UL Standard 224
  • Shrink Ratio: 2:1
  • Environmentally Friendly

Ordering Information

  • GMT-221S-1/4-0 = 1/4" Black Shrink Tube on a Spool
  • GMT-2214FT-1/4-0 = 1/4" Black Shrink Tube cut to 4FT Lengths

Specification

Specification

Gamma Part No. Minimum Expanded as Supplied Maximum Recovered After Heating
W/ Size Mm Inch Mm Inch Mm Inch
GMT-221(S)-3/64 1.2 0.046 0.60 0.023 0.40±0.08 0.016±0.003
GMT-221(S)-1/16 1.6 0.063 0.80 0.031 0.43±0.08 0.017±0.003
GMT-221(S)-3/32 2.4 0.093 1.20 0.046 0.51±0.08 0.020±0.003
GMT-221(S)-1/8 3.2 0.125 1.60 0.062 0.51±0.08 0.020±0.003
GMT-221(S)-3/16 4.8 0.250 2.40 0.093 0.51±0.08 0.020±0.003
GMT-221(S)-1/4 6.4 0.375 3.20 0.125 0.64±0.08 0.025±0.003
GMT-221(S)-3/8 9.5 0.375 4.80 0.187 0.64±0.08 0.025±0.003
GMT-221(S)-1/2 12.7 0.500 6.40 0.25 0.64±0.08 0.025±0.003
GMT-221(S)-3/4 19.1 0.750 9.50 0.375 0.76±0.08 0.030±0.003
GMT-221(S)-1 25.4 1.000 12.70 0.5 0.89±0.12 0.035±0.005
GMT-221(S)-11/4 31.8 1.250 15.90 0.625 1.02±0.15 0.040±0.006
GMT-221(S)-11/2 38.1 1.500 19.10 0.75 1.02±0.15 0.040±0.006
GMT-221(S)-2 50.8 2.000 25.40 1 1.14±0.16 0.045±0.007

Properties

Properties

Category Characteristic Test Requirement Test Procedure / Condition Test Result
A. Sleeving Properties as supplied. 1. Inner Diameter WS Sample ≥ .125" 4.6.3.1.1 of M/23053/5E ≥ .125"
WM Sample ≥ .375" 4.6.3.1.1 of M/23053/5E ≥ .375"
2. Heat Shock 4 Hrs @ 250C 4.6.8 of M/23053/5E No Crack, Flow or drip
360° bend at 3 seconds 4.6.8 of M/23053/5E No Crack
3. Secant Modulus < 25,000 PSI ASTM D 882 & 23053/5E 4.6.12.1 Two Sample Avg < 25,000 PSI
4. Concentricity > 70% ASTM D 2671 & 23053/5E 4.6.3.3 Sample A & B > 70%
5. Color Stability 175°C @ 24 Hrs 4.6.15 of M/23053/5E Slight Darkening, but no Discoloration
6. Restricted Shrinkage 175°C @ 30 min. 4.6.6 of M/23053/5E No Cracking
7. Voltage Withstand 2000 V @ 1 Min. ASTM D 149 & 4.6.6.2 of M/23053/5E No Flashover or Punctures
B. Sleeving Properties after Unrestricted Shrinkage 1. Inner Diameter - Sample A 200 C @ 3 minutes 4.6.5 of M/23053/5E WS Sample ID Befor Rec. > .185", After Rec. =.062"
2. Inner Diameter - Sample B 200 C @ 3 minutes 4.6.5 of M/23053/5E WM Sample ID Befor Rec. > .375", After Rec. =.187"
2. Wall Thickness After Unrestricted Shrinkage 4.6.3.2 of M/23053E WS Sample WT = .2"
After Unrestricted Shrinkage 4.6.3.2 of M/23053E WM Sample WT = .28"
3. Tensile Properties Min of 1500 PSI ASTM D 638 & 4.6.13 of M/23053E AVG > 1500 PSI
4. Dielectric Strength Min of 500 ASTM 2671 & ASTM D 149 WS Sample > 500 PSI
Min of 500 ASTM 2671 & ASTM D 149 WM Sample > 500 PSI
5. Volume Resistivity Min of 10^14 ASTM D 257 & ASTM D 876 >10^14
6. Specific Gravity Max of 1.35 ASTM D 792 ≤1.35
7. Water Absorption Max of .05% ASTM D 570 24 Hr immersion <.05%
8. Corrosion 175°C @ 16 Hrs 4.6.10.1 of M/23053E No Pitting or Blacking
9. Low temperature Flexibility Negative 55°C for 4 hrs 4.6.7.1 of M/23053/5E No Cracking
10. Flammability Self Extinguishing within one minute and no more than 25% or Indicator Flag Burned or Charred ASTM D 2671 & 4.16.14 of M/23053/5E <25% Char, Self Extinguish within one minute, no drip or flow
C. Unrestricted Shrinkage Sleeving after shrinkage 1. Heat Resistance 175°C @ 168 Hrs ASTM D 638 & 4.6.13 of M/23053/5E > 100%
2. Fluid Resistance See Table 2

Table 2

Condition Property Sample WM Sample BM Requirement
Initial Tensile Strength, PSI 1721 (41) 1575 (92) 1,500 min
Ultimate Elongation, % 487 (17) 442 (42) 200 min
Pass / Fail Pass Pass Pass
Heat Aged (*3 Ultimate Elongation, % 415 (28) 439 (24) 100 Min
Pass / Fail Pass Pass Pass
MIL-H-5606 (*4) Tensile Strength, psi 1090 (34) 1143 (30) 1,000 min
Pass / Fail Pass Pass Pass
MIL-A-8243 (*4) Tensile Strength, psi 1090 (34) 1143 (30) 1,000 min
Pass / Fail Pass Pass Pass
MIL-L-7808 (*4) Tensile Strength, psi 1,679 (92) 1,714 (57) 1,000 min
Pass / Fail Pass Pass Pass
MIL-23699 (*4) Tensile Strength, psi 1,782 (102) 1840 (57) 1,000 min
Pass / Fail Pass Pass Pass
JP-8 (*4) Tensile Strength, psi 1260 (61) 1069 (195) 1,000 min
Pass / Fail Pass Pass Pass
5% NaCL (*4) Tensile Strength, PSI 1845 (84) 1,862 (75) 1,000 min
Pass / Fail Pass Pass Pass

Note:-

  • *3 -- Aged in laboratory oven for 168 hours at a nominal 175°C
  • *4 -- Aged in the corresponding fluid for 24 hrs at ambient laboratory conditions.
  • Specimens were wiped off and allowed to rest for 45 (± 15) minutes prior to evaluation.

Color Code: 0=BLK, 1=BRN, 2=RED, 3=ORN, 4=YLW, 5=GRN, 6=BLU, 7=VIO, 8=GRY, 9=WHT, X=CLR