PartsTable
Technical Data Sheet
Download PDF

31B3-128 — HOSE ASSEMBLY,NONMETALLIC

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

31B3-128: HOSE ASSEMBLY,NONMETALLIC.

The HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include seat_angle: 37.0 DEGREES FIRST END, temp_rating: -55.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF, thread_class: 3A FIRST END A, vacuum_in_torr: 381.0, connection_type: THREADED EXTERNAL TUBE FIRST END, inside_diameter: 1.380 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-143-9459, 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
31B3-128
NSN: 4720-01-143-9459
FSC: 4720 — Hose and Flexible Tubing
CAGE: 98437 — ELLIS & WATTS INTERNATIONAL, LLC (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES FIRST END
temp_rating-55.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_class3A FIRST END A
vacuum_in_torr381.0
connection_typeTHREADED EXTERNAL TUBE FIRST END
inside_diameter1.380 INCHES NOMINAL IN
connection_styleFLARED FIRST END
outside_diameter1.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
features_providedREUSABLE END FITTINGS
operating_pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure2000.0 POUNDS PER SQUARE INCH LBS
NSN4720-01-143-9459
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 31B3-128 · 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: 18.250 INCHES NOMINAL OVERALL IN
•
TEMP RATING: -55.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
MINIMUM INSIDE BENDING RADIUS: 10.500 INCHES IN
•
CONNECTION STYLE: FLARED FIRST END
•
END CONNECTION DESIGN: STRAIGHT FIRST END
•
VACUUM IN TORR: 381.0
•
LAYER COMPOSITION AND LOCATION: 1ST LAYER BRAIDED FABRIC AND 2ND LAYER BRAIDED CORROSION RESISTANT STEEL WIRE AND OUTER LAYER RUBBER IMPREGNATED BRAIDED FABRIC
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH18.250 INCHES NOMINAL OVERALL IN
TEMP RATING-55.0 FAHRENHEIT AND 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
MINIMUM INSIDE BENDING RADIUS10.500 INCHES IN
CONNECTION STYLEFLARED FIRST END
END CONNECTION DESIGNSTRAIGHT FIRST END
VACUUM IN TORR381.0
LAYER COMPOSITION AND LOCATION1ST LAYER BRAIDED FABRIC AND 2ND LAYER BRAIDED CORROSION RESISTANT STEEL WIRE AND OUTER LAYER RUBBER IMPREGNATED BRAIDED FABRIC
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER1.750 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4720 — Hose and Flexible Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4720-00-000-0080 4720-00-000-0081 4720-00-000-0084 4720-00-000-0724 4720-00-001-0014 4720-00-001-0015 4720-00-001-0023 4720-00-001-0025
SUBSTITUTES & CROSS-REFERENCES 1
FA6990PPP0182Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 31B3-128?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 31B3-128?
31B3-128 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 31B3-128?
There is 1 known substitute for 31B3-128: FA6990PPP0182. Substitute compatibility should be verified for your specific system.
What is the NSN for 31B3-128?
31B3-128 is cataloged in the U.S. Government catalog under NSN 4720-01-143-9459. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 31B3-128

✓ 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.