PartsTable
Technical Data Sheet
1787777-2 ✓ 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 COMP 12L14 OVERALL, nut_style: PIPE SEAL NUT, nut_height: 0.266 INCHES NOMINAL IN, thread_series: NPSL, special_features: TEMPERATURE RANGE: -200 DEGREES FAHRENHEIT TO +500 DEGREES FAHRENHEIT, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-670-6031, 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
1787777-2
NSN: 4730-00-670-6031
FSC: 4730
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
nut_stylePIPE SEAL NUT
nut_height0.266 INCHES NOMINAL IN
thread_seriesNPSL
special_featuresTEMPERATURE RANGE: -200 DEGREES FAHRENHEIT TO +500 DEGREES FAHRENHEIT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
supplementary_featuresMATERIAL: STEEL, CARBON 12L14, CONDITION OPTIONAL, SPEC ASTM A108
thread_quantity_per_inch18
specification/standard_data96906-DOD-STD-00100 GOVERNMENT STANDARD AND 80204-ANSI Y14.5M-1982 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-670-6031
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1787777-2 · 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
THREAD SERIES: NPSL
NUT STYLE: PIPE SEAL NUT
THREAD QUANTITY PER INCH: 18
NUT HEIGHT: 0.266 INCHES NOMINAL IN
NOMINAL THREAD SIZE: 0.250 INCHES IN
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESNPSL
NUT STYLEPIPE SEAL NUT
THREAD QUANTITY PER INCH18
NUT HEIGHT0.266 INCHES NOMINAL IN
SPECIAL FEATURESTEMPERATURE RANGE: -200 DEGREES FAHRENHEIT TO +500 DEGREES FAHRENHEIT
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, SEAL, PIPE THREAD
NOMINAL THREAD SIZE0.250 INCHES IN
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 12L14 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
TRUSEAL1-4 18NPTInterchangeable
interchangeable cross-reference
interchangeable
TRU-SEAL1-4-18NInterchangeable
interchangeable cross-reference
interchangeable
350-TSE01-25Interchangeable
interchangeable cross-reference
interchangeable
10177036Interchangeable
interchangeable cross-reference
interchangeable
350-TSE01-13Interchangeable
interchangeable cross-reference
interchangeable
8764823Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1787777-2?
1787777-2 is a SEAL NUT,PIPE.
What parts can replace 1787777-2?
There are 24 known substitutes for 1787777-2: TRUSEAL1-4 18NPT, TRU-SEAL1-4-18N, 350-TSE01-25 and 21 more. Substitute compatibility should be verified for your specific system.
Is 1787777-2 still available?
1787777-2 is currently cancelled.
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