PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H3776Hose Assembly,metallic

Harold D Hard Co · NSN 4720-00-343-7035 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-343-7035 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-343-7035. Primary manufacturer part number: H3776.
Features
  • Hose Assembly,metallic — FSC 4720
  • Exterior Color: NATURAL
  • Thread Series Designator: NPT FIRST END
  • End Connection Design: STRAIGHT FIRST END
  • Inside Diameter: 0.250 INCHES NOMINAL IN
  • Outside Diameter: 0.735 INCHES NOMINAL IN
  • Layer Composition and Location: OUTER LAYER SPIRAL INTERLOCKED COPPER
  • Connection Style: PLAIN OPTIONAL END FIRST END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Hose Assembly,metallic, cataloged under National Stock Number 4720-00-343-7035, is classified within Federal Supply Class 4720 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Harold D Hard Co. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4720-00-343-7035
Primary Part NumberH3776
Item NameHose Assembly,metallic
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerHarold D Hard Co
StatusACTIVE
Exterior ColorNATURAL
Thread Series DesignatorNPT FIRST END
End Connection DesignSTRAIGHT FIRST END
Inside Diameter0.250 INCHES NOMINAL IN
Outside Diameter0.735 INCHES NOMINAL IN
Layer Composition and LocationOUTER LAYER SPIRAL INTERLOCKED COPPER
Connection StylePLAIN OPTIONAL END FIRST END
Cross-Sectional Shape StyleROUND
Inner Conveying Tube StyleHELICAL CLOSE-PITCH CORRUGATED
Connection TypeTHREADED INTERNAL PIPE FIRST END
Nominal Thread Size0.375 INCHES FIRST END IN
Measuring Method and Length72.000 INCHES NOMINAL OVERALL IN
Thread DirectionRIGHT-HAND FIRST END
Features ProvidedIDENTICAL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5360-00-135-065753740 INTERCHANGEABLE
Spring,garter,extension
Eaton Corporation Dba Eaton Inoac Div Eaton
5325-00-286-6047 INTERCHANGEABLE
Grommet,nonmetallic
5961-00-850-829153740 INTERCHANGEABLE
Holder,semiconductor Device
L3harris Technologies, Inc Div Space & Airborne Systems
5305-01-074-424653740 INTERCHANGEABLE
Screw,thread
Cae Usa Inc.
4140-01-649-047453740 INTERCHANGEABLE
Fan,ventilating
Applied Companies
5340-01-732-776253740 INTERCHANGEABLE
Bracket,mounting
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
H3776 PRIMARY Harold D Hard Co (USA)
53740 Fyr-Fyter Co Inc (USA)
H53740 Harold D Hard Co (USA)
Related Parts
5360-00-135-0657INTERCHANGEABLE
SPRING,GARTER,EXTENSION
53740
5325-00-286-6047INTERCHANGEABLE
GROMMET,NONMETALLIC
5961-00-850-8291INTERCHANGEABLE
HOLDER,SEMICONDUCTOR DEVICE
53740
5305-01-074-4246INTERCHANGEABLE
SCREW,THREAD
53740
4140-01-649-0474INTERCHANGEABLE
FAN,VENTILATING
53740
5340-01-732-7762INTERCHANGEABLE
BRACKET,MOUNTING
53740

Frequently Asked Questions

What is NSN 4720-00-343-7035?

NSN 4720-00-343-7035 is a Hose Assembly,metallic, manufactured by Harold D Hard Co, classified under FSC 4720 (No Item Name Available). Status: active.

What are the part numbers for NSN 4720-00-343-7035?

NSN 4720-00-343-7035 has 3 cross-referenced part numbers: H3776 (Harold D Hard Co), 53740 (Fyr-Fyter Co Inc), H53740 (Harold D Hard Co).

What NSN replaces 4720-00-343-7035?

There are 6 known substitutes for 4720-00-343-7035: 5360-00-135-0657, 5325-00-286-6047, 5961-00-850-8291 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of H3776?

Key specifications for H3776: Exterior Color: NATURAL; Thread Series Designator: NPT FIRST END; End Connection Design: STRAIGHT FIRST END; Inside Diameter: 0.250 INCHES NOMINAL IN. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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