PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FLEXITE STANDARD UBInsulation Sleeving,electrical

Markel Corp. · NSN 5970-00-221-5303 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-221-5303 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-221-5303. Primary manufacturer part number: FLEXITE STANDARD UB.
Features
  • Insulation Sleeving,electrical — FSC 5970
  • Minimum Tensile Strength: 1800 POUNDS PER SQUARE INCH LBS
  • Temp Rating: -30.0 CELSIUS AND 75.0 CELSIUS DEGC
  • Color: NATURAL
  • Flexibility: FLEXIBLE
  • Departure From Cited Designator: AS MOD BY COLOR
  • Dielectric Material Voltage Rating Per Unit Thickness: 480.0 VOLTS PER MIL /0.001 INCH/ IN
  • Style Designator: NONSHRINKABLE
Applications
  • Applications requiring Plastic Polyvinyl Chloride (pvc) construction
General Description

The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-00-221-5303, is classified within Federal Supply Class 5970 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Markel Corp.. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-00-221-5303
Primary Part NumberFLEXITE STANDARD UB
Item NameInsulation Sleeving,electrical
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerMarkel Corp.
StatusACTIVE
Minimum Tensile Strength1800 POUNDS PER SQUARE INCH LBS
Temp Rating-30.0 CELSIUS AND 75.0 CELSIUS DEGC
ColorNATURAL
FlexibilityFLEXIBLE
Departure From Cited DesignatorAS MOD BY COLOR
Dielectric Material Voltage Rating Per Unit Thickness480.0 VOLTS PER MIL /0.001 INCH/ IN
Style DesignatorNONSHRINKABLE
Environmental ProtectionFLAME RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT
Nondefinitive Spec/std Data1 CATEGORY AND 1 CLASS AND U FORM AND A GRADE AND 0.570 IN. SIZE AND UB SUBFORM AND F TYPE IN
MaterialPLASTIC POLYVINYL CHLORIDE (PVC)
Inside Diameter0.565 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
Wall Thickness0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5970-00-068-12928034664-5 INTERCHANGEABLE
Insulation Sleeving,electrical
Us Army Aviation and Missile Command
5970-00-068-12948034664-4 INTERCHANGEABLE
Insulation Sleeving,electrical
Us Army Aviation and Missile Command
5970-00-221-5297 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5298 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5299FLEXITE STANDARD UB INTERCHANGEABLE
Insulation Sleeving,electrical
Markel Corp.
5970-00-221-5301 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5302 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5304 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5305 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5308 INTERCHANGEABLE
Insulation Sleeving,electrical
Cross-Reference Index
Part NumberManufacturer
FLEXITE STANDARD UB Markel Corp. (USA)
RESINITEEP69C Borden Chemical Co Resinite Dept (USA)
3002 3m Company (USA)
TRANSFLEX 3m Co Admininistrative Electronic & Communications (USA)
MIL-I-631 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
TRANSFLEX Minnesota Mining and Mfg Co 3m Company (USA)
NATVAR261 High Voltage Engineering Corp Natvar Co Div (USA)
TURB0LEX76B Prysmian Cables and Systems Usa, Llc Div Manufacturing Plant (USA)
3002 3m Co Admininistrative Electronic & Communications (USA)
SURCO B-5 Rscc Wire & Cable Llc (USA)
ITCO 919 Insultab Inc Div Pexco Athol (USA)
TRANSFLEX 3m Company (USA)
3002 Minnesota Mining and Mfg Co 3m Company (USA)
GLITEX 120 Nalge Co Div of Sybron Corp (USA)
ASTRA 701 Essex Group Inc Suflex/iwp Div (USA)
Related Parts
5970-00-068-1292INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
8034664-5
5970-00-068-1294INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
8034664-4
5970-00-221-5297INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5298INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5299INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
FLEXITE STANDARD UB
5970-00-221-5301INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5302INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5304INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5305INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5308INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5309INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-222-4778INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL

Frequently Asked Questions

What is NSN 5970-00-221-5303?

NSN 5970-00-221-5303 is a Insulation Sleeving,electrical, manufactured by Markel Corp., classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-00-221-5303?

NSN 5970-00-221-5303 has 15 cross-referenced part numbers: FLEXITE STANDARD UB (Markel Corp.), RESINITEEP69C (Borden Chemical Co Resinite Dept), 3002 (3m Company), TRANSFLEX (3m Co Admininistrative Electronic & Communications), MIL-I-631 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 10 more.

What NSN replaces 5970-00-221-5303?

There are 12 known substitutes for 5970-00-221-5303: 5970-00-068-1292, 5970-00-068-1294, 5970-00-221-5297 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FLEXITE STANDARD UB?

Key specifications for FLEXITE STANDARD UB: Minimum Tensile Strength: 1800 POUNDS PER SQUARE INCH LBS; Temp Rating: -30.0 CELSIUS AND 75.0 CELSIUS DEGC; Color: NATURAL; Flexibility: FLEXIBLE. 13 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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