PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FLEXITE STANDARDInsulation Sleeving,electrical

Markel Corp. · NSN 5970-00-221-5308 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-221-5308 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-221-5308. Primary manufacturer part number: FLEXITE STANDARD.
Features
  • Insulation Sleeving,electrical — FSC 5970
  • Environmental Protection: FLAME RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT
  • Temp Rating: -30.0 CELSIUS AND 75.0 CELSIUS DEGC
  • Flexibility: FLEXIBLE
  • Color: CLEAR
  • Minimum Tensile Strength: 1800 POUNDS PER SQUARE INCH LBS
  • Nondefinitive Spec/std Data: 1 CATEGORY AND I CLASS AND U FORM AND A GRADE AND 0.360IN. SIZE AND UB SUBFORM AND F TYPE IN
  • Dielectric Material Voltage Rating Per Unit Thickness: 700.0 VOLTS PER MIL /0.001 INCH/ IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-00-221-5308, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 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
NSN5970-00-221-5308
Primary Part NumberFLEXITE STANDARD
Item NameInsulation Sleeving,electrical
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerMarkel Corp.
StatusACTIVE
Environmental ProtectionFLAME RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT
Temp Rating-30.0 CELSIUS AND 75.0 CELSIUS DEGC
FlexibilityFLEXIBLE
ColorCLEAR
Minimum Tensile Strength1800 POUNDS PER SQUARE INCH LBS
Nondefinitive Spec/std Data1 CATEGORY AND I CLASS AND U FORM AND A GRADE AND 0.360IN. SIZE AND UB SUBFORM AND F TYPE IN
Dielectric Material Voltage Rating Per Unit Thickness700.0 VOLTS PER MIL /0.001 INCH/ IN
Style DesignatorNONSHRINKABLE
Departure From Cited DocumentAS MOD BY COLOR
Wall Thickness0.018 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN
Reliability IndicatorNOT ESTABLISHED
Inside Diameter0.355 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
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
5970-00-221-5303 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5304 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-221-5305 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-222-4778 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-222-4779 INTERCHANGEABLE
Insulation Sleeving,electrical
Cross-Reference Index
Part NumberManufacturer
FLEXITE STANDARD Markel Corp. (USA)
GLITEX 120 Nalge Co Div of Sybron Corp (USA)
ASTRA 701 Essex Group Inc Suflex/iwp Div (USA)
TRANSFLEX Minnesota Mining and Mfg Co 3m Company (USA)
MIL-I-631 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
TRANSFLEX 3m Co Admininistrative Electronic & Communications (USA)
NATVAR261 High Voltage Engineering Corp Natvar Co Div (USA)
RESINITEEP69C Borden Chemical Co Resinite Dept (USA)
3002 Minnesota Mining and Mfg Co 3m Company (USA)
ITCO 919 Insultab Inc Div Pexco Athol (USA)
TRANSFLEX 3m Company (USA)
TURB0LEX76B Prysmian Cables and Systems Usa, Llc Div Manufacturing Plant (USA)
SURCO B-5 Rscc Wire & Cable Llc (USA)
Related Parts
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
5970-00-221-5303INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5304INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-221-5305INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-222-4778INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-222-4779INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-222-4780INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-222-4782INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL

Frequently Asked Questions

What is NSN 5970-00-221-5308?

NSN 5970-00-221-5308 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 5970-00-221-5308?

NSN 5970-00-221-5308 has 13 cross-referenced part numbers: FLEXITE STANDARD (Markel Corp.), GLITEX 120 (Nalge Co Div of Sybron Corp), ASTRA 701 (Essex Group Inc Suflex/iwp Div), TRANSFLEX (Minnesota Mining and Mfg Co 3m Company), MIL-I-631 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 8 more.

What NSN replaces 5970-00-221-5308?

There are 12 known substitutes for 5970-00-221-5308: 5970-00-221-5297, 5970-00-221-5298, 5970-00-221-5299 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FLEXITE STANDARD?

Key specifications for FLEXITE STANDARD: Environmental Protection: FLAME RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT; Temp Rating: -30.0 CELSIUS AND 75.0 CELSIUS DEGC; Flexibility: FLEXIBLE; Color: CLEAR. 12 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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