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Technical Data Sheet
121781 ✓ 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 HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include seat_angle: 37.0 DEGREES ALL ENDS, temp_rating: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF, connection_type: THREADED INTERNAL TUBE ALL ENDS, inside_diameter: 0.380 INCHES NOMINAL IN, connection_style: GASKET SEAL ALL ENDS, outside_diameter: 0.670 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-196-5385, 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
121781
NSN: 5330-00-196-5385
FSC: 5330
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES ALL ENDS
temp_rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
connection_typeTHREADED INTERNAL TUBE ALL ENDS
inside_diameter0.380 INCHES NOMINAL IN
connection_styleGASKET SEAL ALL ENDS
outside_diameter0.670 INCHES NOMINAL IN
thread_directionRIGHT-HAND ALL ENDS
burst_test_pressure12000.0 POUNDS PER SQUARE INCH LBS
nominal_thread_size0.375 INCHES ALL ENDS IN
end_item_identificationPUMP,FUEL TR
media_for_which_designedFLUID SINGLE RESPONSE
thread_series_designatorUN ALL ENDS
NSN5330-00-196-5385
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 121781 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
PERIPHERAL DIAMETER: 1.492 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN
CENTER HOLE DIAMETER: 1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
ELONGATION PERCENTAGE: 164 MAXIMUM
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER1.492 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
ELONGATION PERCENTAGE164 MAXIMUM
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
FF2741-2Interchangeable
interchangeable cross-reference
interchangeable
7376Interchangeable
interchangeable cross-reference
interchangeable
664759Interchangeable
interchangeable cross-reference
interchangeable
91-3CHC0Interchangeable
interchangeable cross-reference
interchangeable
1PS1Interchangeable
interchangeable cross-reference
interchangeable
182MGV1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121781?
121781 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 121781?
There are 26 known substitutes for 121781: FF2741-2, 7376, 664759 and 23 more. Substitute compatibility should be verified for your specific system.
Is 121781 still available?
121781 is currently cancelled.
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