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Technical Data Sheet
PartsTable / COMPONENT / 31156018DOT
31156018DOT ✓ 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: COPPER ALLOY, thread_size: 3/8-18, special_features: SOURCE CALLS ITEM A UNION, PIPE; CAN BE USED AS STRAIGHT ADAPTER EXTERNAL PIPE TO INTERNAL TUBE, style_designator: INVERTED NUT, TUBE, FLARE, thread_direction: RIGHT-HAND, width_across_flats: 1.0625 INCHES NOMINAL 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 4730-01-499-9176, 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
31156018DOT
NSN: 4730-01-499-9176
FSC: 4730
CAGE: 58755 — LEGRIS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thread_size3/8-18
special_featuresSOURCE CALLS ITEM A UNION, PIPE; CAN BE USED AS STRAIGHT ADAPTER EXTERNAL PIPE TO INTERNAL TUBE
style_designatorINVERTED NUT, TUBE, FLARE
thread_directionRIGHT-HAND
width_across_flats1.0625 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
end_item_identificationVEHICLE, TRUCK TRACTOR; 2320-01-452-5579
smallest_inside_diameter0.2188 INCHES NOMINAL IN
screw_thread_series_designatorNPT
tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
NSN4730-01-499-9176
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 31156018DOT · 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 10
A104-101Interchangeable
interchangeable cross-reference
interchangeable
104-0102Interchangeable
interchangeable cross-reference
interchangeable
104-102Interchangeable
interchangeable cross-reference
interchangeable
104-103Interchangeable
interchangeable cross-reference
interchangeable
A104-103Interchangeable
interchangeable cross-reference
interchangeable
A104-0104Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31156018DOT?
31156018DOT is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 31156018DOT?
There are 10 known substitutes for 31156018DOT: A104-101, 104-0102, 104-102 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31156018DOT?
31156018DOT is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-499-9176. 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