PartsTable
Technical Data Sheet
57F903648-1 ✓ 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 SWIVEL JOINT,HYDRAULIC is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, leg_length: 5.000 INCHES NOMINAL CENTER BULKHEAD IN, seat_angle: 37.0 DEGREES ALL ENDS, bearing_type: SLEEVE, REMOVABLE, thread_class: 2A SECOND END A, connection_type: THREADED EXTERNAL TUBE SECOND END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-659-8970, 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
57F903648-1
NSN: 4730-00-659-8970
FSC: 4730
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length5.000 INCHES NOMINAL CENTER BULKHEAD IN
seat_angle37.0 DEGREES ALL ENDS
bearing_typeSLEEVE, REMOVABLE
thread_class2A SECOND END A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
style_designatorSINGLE JOINT, DOUBLE ELBOW DESIGN
nominal_thread_size0.500 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
nominal_outside_diameter_tube_accommodated0.500 INCHES ALL ENDS IN
NSN4730-00-659-8970
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 57F903648-1 · 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
CONNECTION STYLE: FLARED (TUBE) SECOND END
CONNECTION TYPE: THREADED EXTERNAL TUBE SECOND END
MATERIAL: ALUMINUM ALLOY AND STEEL ELBOW
STYLE DESIGNATOR: SINGLE JOINT, DOUBLE ELBOW DESIGN
BEARING TYPE: SLEEVE, REMOVABLE
THREAD CLASS: 2B FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND END
MATERIALALUMINUM ALLOY AND STEEL ELBOW
MATERIALALUMINUM ALLOY BODY
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
STYLE DESIGNATORSINGLE JOINT, DOUBLE ELBOW DESIGN
BEARING TYPESLEEVE, REMOVABLE
THREAD CLASS2B FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.500 INCHES ALL ENDS IN
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
906R620Interchangeable
interchangeable cross-reference
interchangeable
327-985Interchangeable
interchangeable cross-reference
interchangeable
521231Interchangeable
interchangeable cross-reference
interchangeable
MS28741-8-0850Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-8795Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57F903648-1?
57F903648-1 is a SWIVEL JOINT,HYDRAULIC.
What parts can replace 57F903648-1?
There are 5 known substitutes for 57F903648-1: 906R620, 327-985, 521231 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 57F903648-1?
57F903648-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-659-8970. This indicates validated use in U.S. government and defense supply chains.
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