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PartsTable / COMPONENT / TRUSEAL1-4 18NPT
TRUSEAL1-4 18NPT ✓ 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 SEAL NUT,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL NUT, nut_style: PIPE SEAL NUT, nut_height: 0.266 INCHES NOMINAL IN, thread_class: 2B, thread_series: NPT, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-190-4962, 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
TRUSEAL1-4 18NPT
NSN: 4730-00-190-4962
FSC: 4730
CAGE: 95208 — PARKER-HANNIFIN CORPORATION DIV CYLINDER DIVISION (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_stylePIPE SEAL NUT
nut_height0.266 INCHES NOMINAL IN
thread_class2B
thread_seriesNPT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE NUT
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
thread_quantity_per_inch18
reference_number_differentiating_characteristicsFREE OF MERCURY CONTAMINATION FOR NUCLEAR PROPULSION PLANTS
NSN4730-00-190-4962
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: TRUSEAL1-4 18NPT · 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
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD CLASS: 2B
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.266 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: FREE OF MERCURY CONTAMINATION FOR NUCLEAR PROPULSION PLANTS
•
NUT STYLE: PIPE SEAL NUT
•
SURFACE TREATMENT: CADMIUM AND CHROMATE NUT
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.266 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSFREE OF MERCURY CONTAMINATION FOR NUCLEAR PROPULSION PLANTS
NUT STYLEPIPE SEAL NUT
SURFACE TREATMENTCADMIUM AND CHROMATE NUT
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE SEAL
MATERIALSTEEL NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
1787777-2Interchangeable
interchangeable cross-reference
interchangeable
4730006706031Interchangeable
interchangeable cross-reference
interchangeable
283569R1Interchangeable
interchangeable cross-reference
interchangeable
TRU-SEAL1-4-18NInterchangeable
Same NIIN cross-reference
interchangeable
350-TSE01-25Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TRUSEAL1-4 18NPT?
TRUSEAL1-4 18NPT is a SEAL NUT,PIPE.
What parts can replace TRUSEAL1-4 18NPT?
There are 5 known substitutes for TRUSEAL1-4 18NPT: 1787777-2, 4730006706031, 283569R1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TRUSEAL1-4 18NPT?
TRUSEAL1-4 18NPT is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-190-4962. 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