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H-551 — HOSE ASSEMBLY,NONMETALLIC

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

H-551: HOSE ASSEMBLY,NONMETALLIC.

The HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include inside_diameter: 0.312 INCHES NOMINAL IN, outside_diameter: 0.625 INCHES NOMINAL IN, inside_surface_condition: ROUGH, cross-sectional_shape_style: ROUND, measuring_method_and_length: 12.000 FEET NOMINAL OVERALL FT. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-338-5078, 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
H-551
NSN: 4720-01-338-5078
FSC: 4720 — Hose and Flexible Tubing
CAGE: 17431 — ILLINOIS TOOL WORKS INC. (USA)
SPECIFICATIONS
inside_diameter0.312 INCHES NOMINAL IN
outside_diameter0.625 INCHES NOMINAL IN
inside_surface_conditionROUGH
cross-sectional_shape_styleROUND
measuring_method_and_length12.000 FEET NOMINAL OVERALL FT
NSN4720-01-338-5078
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: H-551 · 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: 12.000 FEET NOMINAL OVERALL FT
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 0.625 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.312 INCHES NOMINAL IN
•
INSIDE SURFACE CONDITION: ROUGH
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH12.000 FEET NOMINAL OVERALL FT
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER0.625 INCHES NOMINAL IN
INSIDE DIAMETER0.312 INCHES NOMINAL IN
INSIDE SURFACE CONDITIONROUGH
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H-551?
H-551 is a HOSE ASSEMBLY,NONMETALLIC.
What is the NSN for H-551?
H-551 is cataloged in the U.S. Government catalog under NSN 4720-01-338-5078. 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.