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Technical Data Sheet
77181 ✓ 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 thread_class: 3A FIRST END A, exterior_color: BLACK, connection_type: THREADED EXTERNAL TUBE FIRST END, inside_diameter: 0.375 INCHES NOMINAL IN, connection_style: INVERTED FLARE FIRST END, outside_diameter: 0.625 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 5340-01-147-3127, 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
77181
NSN: 5340-01-147-3127
FSC: 5340
CAGE: 05228 — PTI TECHNOLOGIES INC. (USA)
SPECIFICATIONS
thread_class3A FIRST END A
exterior_colorBLACK
connection_typeTHREADED EXTERNAL TUBE FIRST END
inside_diameter0.375 INCHES NOMINAL IN
connection_styleINVERTED FLARE FIRST END
outside_diameter0.625 INCHES NOMINAL IN
special_featuresINNER CONVEYING TUBE MATERIAL-RUBBER, SYNTHETIC
thread_directionRIGHT-HAND FIRST END
bolt_hole_diameter0.375 INCHES NOMINAL SECOND END IN
nominal_thread_size0.625 INCHES FIRST END IN
end_connection_designSTRAIGHT FIRST END
inside_surface_conditionSMOOTH
NSN5340-01-147-3127
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 77181 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
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
PERIPHERAL SHAPE STYLE: RECTANGLE, TWO HOLES
CROSS-SECTIONAL SHAPE STYLE: FLAT
BODY THICKNESS: 0.032 INCHES NOMINAL IN
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 0.225 INCHES NOMINAL IN
FEATURES PROVIDED: OBSERVATION FACILITY
LENGTH: 1.050 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH: 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
PERIPHERAL SHAPE STYLERECTANGLE, TWO HOLES
CROSS-SECTIONAL SHAPE STYLEFLAT
BODY THICKNESS0.032 INCHES NOMINAL IN
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.225 INCHES NOMINAL IN
FEATURES PROVIDEDOBSERVATION FACILITY
LENGTH1.050 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
CORNER RADIUS0.090 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH0.600 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
7181Interchangeable
interchangeable cross-reference
interchangeable
5204261Interchangeable
interchangeable cross-reference
interchangeable
77181Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 77181?
77181 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 77181?
There are 3 known substitutes for 77181: 7181, 5204261, 77181. Substitute compatibility should be verified for your specific system.
What is the NSN for 77181?
77181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-147-3127. This indicates validated use in U.S. government and defense supply chains.
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