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Technical Data Sheet
75431A ✓ Verified by PartsTable
· 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 REDUCER,TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, reducer_type: CONCENTRIC, connection_type: UNTHREADED INTERNAL TUBE SECOND END, connection_style: SOCKET (TUBE) FIRST END, nominal_overall_length: 2.125 INCHES IN, nominal_outside_diameter_tube_accommodated: 1.375 INCHES FIRST END 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 4730-00-289-4852, 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
75431A
NSN: 4730-00-289-4852
FSC: 4730
CAGE: 00742 — AIR PRODUCTS & CHEMICALS, INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
reducer_typeCONCENTRIC
connection_typeUNTHREADED INTERNAL TUBE SECOND END
connection_styleSOCKET (TUBE) FIRST END
nominal_overall_length2.125 INCHES IN
nominal_outside_diameter_tube_accommodated1.375 INCHES FIRST END IN
tubing_wall_nominal_thickness_for_which_designed0.055 INCHES FIRST END IN
NSN4730-00-289-4852
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 75431A · 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
REDUCER TYPE: CONCENTRIC
CONNECTION TYPE: UNTHREADED INTERNAL TUBE SECOND END
TUBING WALL NOMINAL THICKNESS FOR WHICH DESIGNED: 0.750 INCHES SECOND END IN
NOMINAL OVERALL LENGTH: 2.125 INCHES IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.375 INCHES FIRST END IN
CONNECTION STYLE: SOCKET (TUBE) FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
REDUCER TYPECONCENTRIC
CONNECTION TYPEUNTHREADED INTERNAL TUBE SECOND END
TUBING WALL NOMINAL THICKNESS FOR WHICH DESIGNED0.750 INCHES SECOND END IN
NOMINAL OVERALL LENGTH2.125 INCHES IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.375 INCHES FIRST END IN
CONNECTION STYLESOCKET (TUBE) FIRST END
CONNECTION TYPEUNTHREADED INTERNAL TUBE FIRST END
CONNECTION STYLESOCKET (TUBE) SECOND END
TUBING WALL NOMINAL THICKNESS FOR WHICH DESIGNED0.055 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.875 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
701Interchangeable
interchangeable cross-reference
interchangeable
A40-3TABLE5Interchangeable
interchangeable cross-reference
interchangeable
B16.18Interchangeable
interchangeable cross-reference
interchangeable
W1037Interchangeable
interchangeable cross-reference
interchangeable
62400-57Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 75431A?
75431A is a REDUCER,TUBE.
What parts can replace 75431A?
There are 5 known substitutes for 75431A: 701, A40-3TABLE5, B16.18 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 75431A?
75431A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-4852. This indicates validated use in U.S. government and defense supply chains.
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