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Y21-2A — HOSE ASSEMBLY,NONMETALLIC

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

Y21-2A: HOSE ASSEMBLY,NONMETALLIC.

The HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include seat_angle: 30.0 DEGREES FIRST END, temp_rating: -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF, connection_type: THREADED EXTERNAL PIPE FIRST END, inside_diameter: 0.250 INCHES NOMINAL IN, connection_style: INVERTED FLARE FIRST END, outside_diameter: 0.688 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-851-5993, 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
Y21-2A
NSN: 4720-00-851-5993
FSC: 4720 — Hose and Flexible Tubing
CAGE: 45225 — BOSCH AUTOMOTIVE SERVICE SOLUTIONS INC. (USA)
SPECIFICATIONS
seat_angle30.0 DEGREES FIRST END
temp_rating-40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
connection_typeTHREADED EXTERNAL PIPE FIRST END
inside_diameter0.250 INCHES NOMINAL IN
connection_styleINVERTED FLARE FIRST END
outside_diameter0.688 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
operating_pressure5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure20000.0 POUNDS PER SQUARE INCH LBS
nominal_thread_size0.250 INCHES FIRST END IN
end_connection_designSTRAIGHT FIRST END
inside_surface_conditionSMOOTH
NSN4720-00-851-5993
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: Y21-2A · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MEASURING METHOD AND LENGTH: 96.000 INCHES NOMINAL OVERALL IN
•
TEMP RATING: -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
CONNECTION STYLE: INVERTED FLARE FIRST END
•
END CONNECTION DESIGN: STRAIGHT FIRST END
•
LAYER COMPOSITION AND LOCATION: 1ST LAYER BRAIDED COTTON CORD AND 2ND LAYER BRAIDED STEEL WIRE AND 3RD LAYER BRAIDED STEEL WIRE AND OUTER LAYER MOLDED RUBBER, CHLOROPRENE
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 0.688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH96.000 INCHES NOMINAL OVERALL IN
TEMP RATING-40.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
CONNECTION STYLEINVERTED FLARE FIRST END
END CONNECTION DESIGNSTRAIGHT FIRST END
LAYER COMPOSITION AND LOCATION1ST LAYER BRAIDED COTTON CORD AND 2ND LAYER BRAIDED STEEL WIRE AND 3RD LAYER BRAIDED STEEL WIRE AND OUTER LAYER MOLDED RUBBER, CHLOROPRENE
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER0.688 INCHES NOMINAL IN
OPERATING PRESSURE5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
THREAD DIRECTIONRIGHT-HAND FIRST END
SUBSTITUTES & CROSS-REFERENCES 1
9768Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is Y21-2A?
Y21-2A is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace Y21-2A?
There is 1 known substitute for Y21-2A: 9768. Substitute compatibility should be verified for your specific system.
What is the NSN for Y21-2A?
Y21-2A is cataloged in the U.S. Government catalog under NSN 4720-00-851-5993. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.