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5A1083 ✓ 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 EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY FLANGE, joint_type: SINGLE, design_type: CORRUGATED ELEMENT, overall_length: 6.750 INCHES NOMINAL IN, bolt_hole_diameter: 0.250 INCHES NOMINAL IN, end_connection_type: FLANGED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-627-3418, 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
5A1083
NSN: 4730-00-627-3418
FSC: 4730
CAGE: 03481 — BFGOODRICH CO THE AEROSPACE DIV ENGINEERED POLYMER PRODUCTS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY FLANGE
joint_typeSINGLE
design_typeCORRUGATED ELEMENT
overall_length6.750 INCHES NOMINAL IN
bolt_hole_diameter0.250 INCHES NOMINAL IN
bolt_hole_quantity6
end_connection_typeFLANGED
bolt_circle_diameter4.313 INCHES NOMINAL IN
end_item_identificationUSED ON WATER INJECTION SYSTEM OF B52 AIRCRAFT
equalization_characteristicSELF-EQUALIZING
nominal_pipe_size_designation2.250 INCHES IN
NSN4730-00-627-3418
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5A1083 · 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
•
END CONNECTION TYPE: FLANGED
•
MATERIAL: ALUMINUM ALLOY FLANGE
•
BOLT HOLE QUANTITY: 6
•
BOLT HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
EQUALIZATION CHARACTERISTIC: SELF-EQUALIZING
•
DESIGN TYPE: CORRUGATED ELEMENT
•
JOINT TYPE: SINGLE
TECHNICAL CHARACTERISTICS (FLIS)
END CONNECTION TYPEFLANGED
END ITEM IDENTIFICATIONUSED ON WATER INJECTION SYSTEM OF B52 AIRCRAFT
MATERIALALUMINUM ALLOY FLANGE
BOLT HOLE QUANTITY6
BOLT HOLE DIAMETER0.250 INCHES NOMINAL IN
EQUALIZATION CHARACTERISTICSELF-EQUALIZING
DESIGN TYPECORRUGATED ELEMENT
JOINT TYPESINGLE
OVERALL LENGTH6.750 INCHES NOMINAL IN
NOMINAL PIPE SIZE DESIGNATION2.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
296Interchangeable
interchangeable cross-reference
interchangeable
A649Interchangeable
interchangeable cross-reference
interchangeable
296C3Interchangeable
interchangeable cross-reference
interchangeable
G9754PC82Interchangeable
interchangeable cross-reference
interchangeable
C11735-6PC119Interchangeable
interchangeable cross-reference
interchangeable
G9681PC76Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5A1083?
5A1083 is a EXPANSION JOINT,PIPE.
What parts can replace 5A1083?
There are 17 known substitutes for 5A1083: 296, A649, 296C3 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5A1083?
5A1083 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-627-3418. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026