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Technical Data Sheet
PartsTable / MRO / 11721
11721 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: OPHTHALMOSCOPE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-396-3004, 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
MRO→ MRO_GENERAL→ 11721
NSN: 5330-00-396-3004
FSC: 5330
CAGE: 78640 — MITSUBISHI CATERPILLAR FORKLIFT AMERICA, INC (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyOPHTHALMOSCOPE
NSN5330-00-396-3004
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 11721 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
•
SEPARATOR QUANTITY: 2
•
HEIGHT: 1.312 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: V TOP RING
•
MATERIAL: LEATHER TOP RING
•
INTERMEDIATE RING QUANTITY: 9
•
INSIDE DIAMETER: 5.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEPARATOR QUANTITY2
HEIGHT1.312 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEV TOP RING
CROSS-SECTIONAL SHAPE STYLEV INTERMEDIATE RING
MATERIALLEATHER TOP RING
INTERMEDIATE RING QUANTITY9
MATERIALLEATHER INTERMEDIATE RING
INSIDE DIAMETER5.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
712804-2Interchangeable
interchangeable cross-reference
interchangeable
SAE11721Interchangeable
interchangeable cross-reference
interchangeable
5998PL0977599Interchangeable
interchangeable cross-reference
interchangeable
J537Interchangeable
interchangeable cross-reference
interchangeable
911721Interchangeable
interchangeable cross-reference
interchangeable
3EH-G-172Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11721?
11721 is a TRANSFORMER,RADIO FREQUENCY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 11721?
There are 17 known substitutes for 11721: 712804-2, SAE11721, 5998PL0977599 and 14 more. Substitute compatibility should be verified for your specific system.
Is 11721 still available?
11721 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026