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1977747-4 — HOSE ASSEMBLY,NONMETALLIC

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

1977747-4: HOSE ASSEMBLY,NONMETALLIC.

The HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include end_item_identification: FILL AND DRAIN PUMP ASSEMBLY, part_name_assigned_by_controlling_agency: PUMP,AXIAL PISTON,CHECK BALL. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-353-8482, 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
1977747-4
NSN: 4720-01-353-8482
FSC: 4720 — Hose and Flexible Tubing
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
special_featuresPUMP IS BI-ROTATIONAL, PROVIDING CONSTANT DIRECTION OF FLOW REGARDLESS OF DRIVE SHAFT ROTATION; PUMP HAS EXTRA SAE NBR.20 OUTLET PORT
end_item_identificationFILL AND DRAIN PUMP ASSEMBLY
part_name_assigned_by_controlling_agencyPUMP,AXIAL PISTON,CHECK BALL
NSN4720-01-353-8482
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 1977747-4 · 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
SUBSTITUTES & CROSS-REFERENCES 1
1977622Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1977747-4?
1977747-4 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 1977747-4?
There is 1 known substitute for 1977747-4: 1977622. Substitute compatibility should be verified for your specific system.
What is the NSN for 1977747-4?
1977747-4 is cataloged in the U.S. Government catalog under NSN 4720-01-353-8482. 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.