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U1-3A ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, anode_type: PLAIN FOIL, body_style: W/TWIST TAB MTG, TERMINAL(S) ON ONE END, head_shape: EGG, body_length: 2.000 INCHES NOMINAL IN, memory_size: 4096.0 MEGABYTES. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-320-4491, 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
U1-3A
NSN: 4730-01-320-4491
FSC: 4730
CAGE: 41947 — MUELLER BRASS CO. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
anode_typePLAIN FOIL
body_styleW/TWIST TAB MTG, TERMINAL(S) ON ONE END
head_shapeEGG
body_length2.000 INCHES NOMINAL IN
memory_size4096.0 MEGABYTES
body_diameter1.375 INCHES NOMINAL IN
overall_width1.000 INCHES NOMINAL IN
overall_height0.844 INCHES NOMINAL IN
overall_length1.000 INCHES NOMINAL IN
shank_diameter1.6 MILLIMETERS NOMINAL MM
shell_materialZINC ALLOY
NSN4730-01-320-4491
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: U1-3A · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
B11104-1Interchangeable
interchangeable cross-reference
interchangeable
D162865Interchangeable
interchangeable cross-reference
interchangeable
R808029BInterchangeable
interchangeable cross-reference
interchangeable
TVL1230Interchangeable
interchangeable cross-reference
interchangeable
A1117Interchangeable
interchangeable cross-reference
interchangeable
38302P3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is U1-3A?
U1-3A is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace U1-3A?
There are 12 known substitutes for U1-3A: B11104-1, D162865, R808029B and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for U1-3A?
U1-3A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-320-4491. 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