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PartsTable / COMPONENT / TYPE 1 CLASS A
TYPE 1 CLASS A ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The TAPE,INSULATION,ELECTRICAL is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include color: YELLOW OVERALL, material: PLASTIC POLYIMIDE OVERALL, inside_width: 0.250 INCHES NOMINAL IN, inside_length: 2.313 INCHES NOMINAL IN, nominal_width: 0.750 INCHES IN, outside_width: 0.750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-753-5579, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
TYPE 1 CLASS A
NSN: 5340-00-753-5579
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
colorYELLOW OVERALL
materialPLASTIC POLYIMIDE OVERALL
inside_width0.250 INCHES NOMINAL IN
inside_length2.313 INCHES NOMINAL IN
nominal_width0.750 INCHES IN
outside_width0.750 INCHES NOMINAL IN
nominal_length1000.0 FEET FT
overall_length2.688 INCHES NOMINAL IN
painted_featureNOT INCLUDED
style_designatorFLAT
surface_treatmentOXIDE
cut_type_and_quantity1 SINGLE
NSN5340-00-753-5579
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: TYPE 1 CLASS A MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTSIDE WIDTH: 0.750 INCHES NOMINAL IN
•
INSIDE WIDTH: 0.250 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY 857
•
SURFACE TREATMENT: OXIDE
•
STYLE DESIGNATOR: FLAT
•
PAINTED FEATURE: NOT INCLUDED
•
INSIDE LENGTH: 2.313 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE WIDTH0.750 INCHES NOMINAL IN
INSIDE WIDTH0.250 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 857
SURFACE TREATMENTOXIDE
STYLE DESIGNATORFLAT
PAINTED FEATURENOT INCLUDED
INSIDE LENGTH2.313 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS
OVERALL LENGTH2.688 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
TYPE2CLASSAInterchangeable
interchangeable cross-reference
interchangeable
MILH9890Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-9890 E TY 2 CLAInterchangeable
interchangeable cross-reference
interchangeable
4-1-139Interchangeable
interchangeable cross-reference
interchangeable
4-1-453Interchangeable
interchangeable cross-reference
interchangeable
TYPE1CLASSAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TYPE 1 CLASS A?
TYPE 1 CLASS A is a TAPE,INSULATION,ELECTRICAL.
What parts can replace TYPE 1 CLASS A?
There are 8 known substitutes for TYPE 1 CLASS A: TYPE2CLASSA, MILH9890, MIL-H-9890 E TY 2 CLA and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TYPE 1 CLASS A?
TYPE 1 CLASS A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-753-5579. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026