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1977574 — HOSE ASSEMBLY,NONMETALLIC,FIRE F

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

1977574: HOSE ASSEMBLY,NONMETALLIC,FIRE F.

HOSE ASSEMBLY,NONMETALLIC,FIRE F. Key specifications include material: STEEL BODY, special_features: NHA: HPU ASSEMBLY, bolt_hole_quantity: 6 ALL ENDS, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, maximum_operating_temp: 300.0 FAHRENHEIT SINGLE RESPONSE DEGF, minimum_operating_temp: -40.0 FAHRENHEIT DEGF. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-354-5322, 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
1977574
NSN: 4720-01-354-5322
NIINs: 013545322, 013545323, 013549013, 013549014, 014542094, 014988425, 014988442, 014988459, 014988481
FSC: 4720 — Hose and Flexible Tubing
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL BODY
special_featuresNHA: HPU ASSEMBLY
bolt_hole_quantity6 ALL ENDS
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
maximum_operating_temp300.0 FAHRENHEIT SINGLE RESPONSE DEGF
minimum_operating_temp-40.0 FAHRENHEIT DEGF
valve_operation_methodMANUAL
end_item_identificationHPU ASSEMBLY
part_name_assigned_by_controlling_agencyVALVE, BALL 1.00" SUBPLATE MOUNTED
NSN4720-01-354-5322
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 1977574 · 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
•
OPERATING PRESSURE: 2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
•
INSIDE DIAMETER: 1.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OPERATING PRESSURE2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
INSIDE DIAMETER1.500 INCHES NOMINAL IN
END ITEM IDENTIFICATIONHPU ASSEMBLY,HYDRAULIC POWER UNIT-STEERING GEAR
SUBSTITUTES & CROSS-REFERENCES 2
PE42942-500Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1977574 ITEM 45Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 1977574?
1977574 is a HOSE ASSEMBLY,NONMETALLIC,FIRE F.
What parts can replace 1977574?
There are 2 known substitutes for 1977574: PE42942-500, 1977574 ITEM 45. Substitute compatibility should be verified for your specific system.
What is the NSN for 1977574?
1977574 is cataloged in the U.S. Government catalog under NSN 4720-01-354-5322. 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.