PartsTable
Technical Data Sheet
ISR-21 ✓ 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 RING,WIPER is a the manufacturer industrial component. Key specifications include ring_style: CONCENTRIC, joint_style: DIAGONAL JOINT, inside_diameter: 2.000 INCHES NOMINAL IN, outside_diameter: 2.282 INCHES NOMINAL IN, surface_treatment: UNABLE TO DECODE, material_thickness: 0.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-640-8538, 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
ISR-21
NSN: 5330-00-640-8538
FSC: 5330
CAGE: 95725 — INDUSTRIAL SUPPLIES (USA)
SPECIFICATIONS
ring_styleCONCENTRIC
joint_styleDIAGONAL JOINT
inside_diameter2.000 INCHES NOMINAL IN
outside_diameter2.282 INCHES NOMINAL IN
surface_treatmentUNABLE TO DECODE
material_thickness0.125 INCHES NOMINAL IN
fsc_application_dataHYDRAULIC SYSTEM,ACFT
outer_edge_thickness0.094 INCHES NOMINAL IN
cross-sectional_shape_styleOUTSIDE GROOVED, STRAIGHT FACE
specification/standard_data96906-MS28776 GOVERNMENT STANDARD
surface_treatment_document_and_classificationUNABLE TO DECODE
NSN5330-00-640-8538
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ISR-21 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
INSIDE DIAMETER: 2.000 INCHES NOMINAL IN
TEST DATA DOCUMENT: 81349-MIL-S-5049 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
FSC APPLICATION DATA: HYDRAULIC SYSTEM,ACFT
SURFACE TREATMENT: UNABLE TO DECODE
SPECIFICATION/STANDARD DATA: 96906-MS28776 GOVERNMENT STANDARD
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
RING STYLE: CONCENTRIC
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER2.000 INCHES NOMINAL IN
TEST DATA DOCUMENT81349-MIL-S-5049 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
FSC APPLICATION DATAHYDRAULIC SYSTEM,ACFT
SURFACE TREATMENTUNABLE TO DECODE
SPECIFICATION/STANDARD DATA96906-MS28776 GOVERNMENT STANDARD
END ITEM IDENTIFICATIONW/S: FORRESTAL CLASS CV; FIRE CONTROL SYSTEM, MISSILE MK 74 (FCS); VIRGINIA CLASS CGN (4A); KIDD CLASS DDG; AIRCRAFT, HERCULES C-130F; AIRCRAFT, HERCULES KC-130; ELEVATORS, CARGO/WEAPONS; AIRCRAFT, AWACS, E-3A; TANK, COMBAT, FT, 120MM GUN (M1A1); AIRCRAFT (AC-130H, MC-130H, EC-130E, HC-130); NIMITZ CLASS CVN; FMS-BUILD FRIGATES CLASS SHIPS; DECK MACHINERY; AIRCRAFT, STRATOLIFTER C-135 A
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
RING STYLECONCENTRIC
JOINT STYLEDIAGONAL JOINT
CROSS-SECTIONAL SHAPE STYLEOUTSIDE GROOVED, STRAIGHT FACE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
TCF20Interchangeable
interchangeable cross-reference
interchangeable
60870244Interchangeable
interchangeable cross-reference
interchangeable
2532Interchangeable
interchangeable cross-reference
interchangeable
DMRUInterchangeable
interchangeable cross-reference
interchangeable
G21Interchangeable
interchangeable cross-reference
interchangeable
CBC 218Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ISR-21?
ISR-21 is a RING,WIPER.
What parts can replace ISR-21?
There are 23 known substitutes for ISR-21: TCF20, 60870244, 2532 and 20 more. Substitute compatibility should be verified for your specific system.
Is ISR-21 still available?
ISR-21 is currently cancelled.
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