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AH1140-U 4 1/2-3 — Technical Data Sheet

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— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, leg_length: 1.080 INCHES NOMINAL SECOND END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE SECOND END, connection_style: PLAIN (PIPE) THIRD END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-01-485-5424, 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
AH1140-U 4 1/2-3
NSN: 4730-01-485-5424
FSC: 4730
CAGE: 02750 — EATON AEROSPACE LLC DBA EATON INOAC DIV FLUID & ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
leg_length1.080 INCHES NOMINAL SECOND END IN
seat_angle37.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_stylePLAIN (PIPE) THIRD END
special_featuresTUBE NORMALLY CONNECTED WITH SLEEVE AND NUT
surface_treatmentCADMIUM OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.125 INCHES THIRD END IN
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
end_item_identificationHYDRAULIC AND AIR SYSTEM
NSN4730-01-485-5424
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AH1140-U 4 1/2-3 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD SERIES DESIGNATOR: NPTF THIRD END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES SECOND END IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-F-18866 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SPECIFICATION/STANDARD DATA: 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51513 GOVERNMENT STANDARD
•
MEDIA FOR WHICH DESIGNED: AIR SECOND RESPONSE
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SURFACE TREATMENTCADMIUM OVERALL
THREAD SERIES DESIGNATORNPTF THIRD END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES SECOND END IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-F-18866 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SPECIFICATION/STANDARD DATA81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51513 GOVERNMENT STANDARD
MEDIA FOR WHICH DESIGNEDAIR SECOND RESPONSE
MATERIALSTEEL OVERALL
THREAD CLASS2A SECOND END A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
SAE J514 8-6 070427BAInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SAE-J514InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
J514InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS51513B4InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
MIL-F-18866InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
MS51513InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AH1140-U 4 1/2-3?
AH1140-U 4 1/2-3 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AH1140-U 4 1/2-3?
There are 8 known substitutes for AH1140-U 4 1/2-3: SAE J514 8-6 070427BA, SAE-J514, J514 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AH1140-U 4 1/2-3?
AH1140-U 4 1/2-3 is cataloged in the Federal Logistics Information System under NSN 4730-01-485-5424. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026