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Technical Data Sheet
PartsTable / COMPONENT / 4L2-3
4L2-3 ✓ 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 NETWORK,PHASE CHANGING is a the manufacturer industrial component. Key specifications include angle: 67.5 DEGREES, height: 1.031 INCHES NOMINAL IN, material: STEEL OVERALL, shank_length: 0.375 INCHES NOMINAL IN, special_features: NO CHECK VALVE, style_designator: ANGLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-540-1007, 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
4L2-3
NSN: 4730-00-540-1007
FSC: 4730
CAGE: Z0031 — BOEING AEROSTRUCTURES AUSTRALIAPTY LTD (AUS)
SPECIFICATIONS
angle67.5 DEGREES
height1.031 INCHES NOMINAL IN
materialSTEEL OVERALL
shank_length0.375 INCHES NOMINAL IN
special_featuresNO CHECK VALVE
style_designatorANGLE
surface_treatmentCADMIUM OVERALL
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.125 INCHES IN
thread_quantity_per_inch27
assembly_clearance_radius0.328 INCHES NOMINAL IN
screw_thread_series_designatorNPT
NSN4730-00-540-1007
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4L2-3 · 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
•
HEIGHT: 1.031 INCHES NOMINAL IN
•
ASSEMBLY CLEARANCE RADIUS: 0.328 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 27
•
ANGLE: 67.5 DEGREES
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
•
WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HEIGHT1.031 INCHES NOMINAL IN
SPECIAL FEATURESNO CHECK VALVE
ASSEMBLY CLEARANCE RADIUS0.328 INCHES NOMINAL IN
THREAD QUANTITY PER INCH27
ANGLE67.5 DEGREES
NOMINAL THREAD SIZE0.125 INCHES IN
SCREW THREAD SERIES DESIGNATORNPT
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
5345Interchangeable
interchangeable cross-reference
interchangeable
1612Interchangeable
interchangeable cross-reference
interchangeable
RL25-17Interchangeable
interchangeable cross-reference
interchangeable
1651Interchangeable
interchangeable cross-reference
interchangeable
218838Interchangeable
interchangeable cross-reference
interchangeable
01-90-3009Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4L2-3?
4L2-3 is a NETWORK,PHASE CHANGING.
What parts can replace 4L2-3?
There are 19 known substitutes for 4L2-3: 5345, 1612, RL25-17 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4L2-3?
4L2-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-540-1007. 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