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PartsTable / COMPONENT / HS721-1
HS721-1 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The HOSE ASSEMBLY,METALLIC is a the manufacturer industrial component. Key specifications include flow_angle: 90.0 DEGREES FIRST END, seat_angle: 37.0 DEGREES FIRST END, temp_rating: 850.0 FAHRENHEIT SINGLE RESPONSE DEGF, thread_class: 2B FIRST END, connection_type: THREADED INTERNAL TUBE FIRST END, inside_diameter: 1.000 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 4720-00-873-7866, 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
HS721-1
NSN: 4720-00-873-7866
FSC: 4720
CAGE: 99755 — FMH AEROSPACE CORP. (USA)
SPECIFICATIONS
flow_angle90.0 DEGREES FIRST END
seat_angle37.0 DEGREES FIRST END
temp_rating850.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_class2B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
inside_diameter1.000 INCHES NOMINAL IN
connection_styleSWIVEL NUT FLARE FIRST END
outside_diameter1.300 INCHES NOMINAL IN
special_featuresONE ELBOW HAS AN EXTRA BEND OF 104 DEG WITH A 15 DEG OFFSET FROM 90 DEGBEND
thread_directionRIGHT-HAND FIRST END
features_providedIDENTICAL ENDS
operating_pressure290.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
NSN4720-00-873-7866
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: HS721-1 · 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
•
TEMP RATING: 850.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
MINIMUM INSIDE BENDING RADIUS: 6.500 INCHES IN
•
INNER CONVEYING TUBE STYLE: HELICAL OPEN-PITCH CORRUGATED
•
LAYER COMPOSITION AND LOCATION: OUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE
•
THREAD CLASS: 2B FIRST END
•
ANGLE BETWEEN RIGID ELBOW FITTINGS IN DEG: 180.0
•
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
•
SEAT ANGLE: 37.0 DEGREES FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING850.0 FAHRENHEIT SINGLE RESPONSE DEGF
MINIMUM INSIDE BENDING RADIUS6.500 INCHES IN
INNER CONVEYING TUBE STYLEHELICAL OPEN-PITCH CORRUGATED
LAYER COMPOSITION AND LOCATIONOUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE
THREAD CLASS2B FIRST END
ANGLE BETWEEN RIGID ELBOW FITTINGS IN DEG180.0
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
SEAT ANGLE37.0 DEGREES FIRST END
FLOW ANGLE90.0 DEGREES FIRST END
OUTSIDE DIAMETER1.300 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
S1051Interchangeable
interchangeable cross-reference
interchangeable
12636Interchangeable
interchangeable cross-reference
interchangeable
33825431Interchangeable
interchangeable cross-reference
interchangeable
33825411Interchangeable
interchangeable cross-reference
interchangeable
SAE J512 6 040110CInterchangeable
interchangeable cross-reference
interchangeable
353-100-0012Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HS721-1?
HS721-1 is a HOSE ASSEMBLY,METALLIC.
What parts can replace HS721-1?
There are 6 known substitutes for HS721-1: S1051, 12636, 33825431 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HS721-1?
HS721-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-873-7866. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026