PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 778-1 1/2X3/4
778-1 1/2X3/4 ✓ 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 778-1 1/2X3/4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-894-2551, 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
778-1 1/2X3/4
NSN: 4730-00-894-2551
FSC: 4730
CAGE: 82666 — STOCKHAM VALVES AND FITTINGS INC (USA)
SPECIFICATIONS
Part Number778-1 1/2X3/4
NSN4730-00-894-2551
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 778-1 1/2X3/4 · 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 OVERALL LENGTH: 2.688 INCHES IN
•
MEDIA FOR WHICH DESIGNED: STEAM FIRST RESPONSE
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST END
•
NOMINAL THREAD SIZE: 1.500 INCHES FIRST END IN
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.500 INCHES FIRST END IN
•
REDUCER TYPE: CONCENTRIC
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH2.688 INCHES IN
MEDIA FOR WHICH DESIGNEDSTEAM FIRST RESPONSE
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST END
OPERATING PRESSURE1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
NOMINAL THREAD SIZE1.500 INCHES FIRST END IN
NOMINAL PIPE SIZE ACCOMMODATED1.500 INCHES FIRST END IN
REDUCER TYPECONCENTRIC
CONNECTION STYLEPLAIN (PIPE) SECOND END
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
404Interchangeable
interchangeable cross-reference
interchangeable
24KYInterchangeable
interchangeable cross-reference
interchangeable
52C17Interchangeable
interchangeable cross-reference
interchangeable
778Interchangeable
interchangeable cross-reference
interchangeable
242-0373-00Interchangeable
interchangeable cross-reference
interchangeable
17408Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 778-1 1/2X3/4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 778-1 1/2X3/4?
778-1 1/2X3/4 is a 778-1 1/2X3/4.
What parts can replace 778-1 1/2X3/4?
There are 13 known substitutes for 778-1 1/2X3/4: 404, 24KY, 52C17 and 10 more. Substitute compatibility should be verified for your specific system.
Is 778-1 1/2X3/4 still available?
778-1 1/2X3/4 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 778-1 1/2X3/4

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026