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PartsTable / COMPONENT / 1787777-5
1787777-5 ✓ 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: 1.313 INCHES NOMINAL IN, thread_series: NPSL, thread_direction: RIGHT-HAND, surface_treatment: CADMIUM OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-670-6033, 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
1787777-5
NSN: 4730-00-670-6033
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_height1.313 INCHES NOMINAL IN
thread_seriesNPSL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats1.378 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
thread_quantity_per_inch14
material_document_and_classificationQQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classification0.375 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-670-6033
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1787777-5 · 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 DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL COMP 12L14 OVERALL
•
THREAD QUANTITY PER INCH: 14
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD SERIES: NPSL
•
NUT HEIGHT: 1.313 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 0.375 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 12L14 OVERALL
THREAD QUANTITY PER INCH14
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD SERIESNPSL
NUT HEIGHT1.313 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION0.375 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS1.378 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
10177036Interchangeable
interchangeable cross-reference
interchangeable
350-TSE01-13Interchangeable
interchangeable cross-reference
interchangeable
8764823Interchangeable
interchangeable cross-reference
interchangeable
TSE01-75Interchangeable
interchangeable cross-reference
interchangeable
103-06612Interchangeable
interchangeable cross-reference
interchangeable
C3-059X12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1787777-5?
1787777-5 is a SEAL NUT,PIPE.
What parts can replace 1787777-5?
There are 20 known substitutes for 1787777-5: 10177036, 350-TSE01-13, 8764823 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1787777-5?
1787777-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-670-6033. 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