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Technical Data Sheet
PartsTable / COMPONENT / 657-3/4IN
657-3/4IN ✓ 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 657-3/4IN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-265-1934, 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
657-3/4IN
NSN: 4730-00-265-1934
FSC: 4730
CAGE: 28960 — ITT FLUID TECHNOLOGY CORP ITT MCDONNELL AND MILLER (USA)
SPECIFICATIONS
Part Number657-3/4IN
NSN4730-00-265-1934
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 657-3/4IN · 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
•
MATERIAL: STEEL CORROSION RESISTING WORKING PARTS
•
RATED CAPACITY AT MAXIMUM WORKING PRESSURE: 3200.0 POUNDS OF WATER PER HOUR LBS
•
OUTLET CONNECTION TYPE: FEMALE IRON PIPE
•
SCREW THREAD SERIES DESIGNATOR: NPT BOTH INLET AND OUTLET
•
DESIGN TYPE: PULSATING
•
THREAD DIRECTION: RIGHT-HAND BOTH INLET AND OUTLET
•
BODY DESIGN: STRAIGHT PATTERN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESTYPICAL USES: SMALL STERILIZERS, PRESSING MACHINES, TANKS, SMALL DRYERS, TRACER STEAM HEATING LINES, INDUSTRIAL PROCESSING EQUIPMENT
MATERIALSTEEL CORROSION RESISTING WORKING PARTS
RATED CAPACITY AT MAXIMUM WORKING PRESSURE3200.0 POUNDS OF WATER PER HOUR LBS
OUTLET CONNECTION TYPEFEMALE IRON PIPE
SCREW THREAD SERIES DESIGNATORNPT BOTH INLET AND OUTLET
DESIGN TYPEPULSATING
THREAD DIRECTIONRIGHT-HAND BOTH INLET AND OUTLET
BODY DESIGNSTRAIGHT PATTERN
MAXIMUM STEAM WORKING PRESSUREERR-060
INLET CONNECTION TYPEFEMALE IRON PIPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
WWT696Interchangeable
interchangeable cross-reference
interchangeable
62SInterchangeable
interchangeable cross-reference
interchangeable
140Interchangeable
interchangeable cross-reference
interchangeable
B1X-180Interchangeable
interchangeable cross-reference
interchangeable
KE51248Interchangeable
interchangeable cross-reference
interchangeable
212Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 657-3/4IN?
657-3/4IN is a 657-3/4IN.
What parts can replace 657-3/4IN?
There are 28 known substitutes for 657-3/4IN: WWT696, 62S, 140 and 25 more. Substitute compatibility should be verified for your specific system.
Is 657-3/4IN still available?
657-3/4IN is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026