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Technical Data Sheet
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520674 ✓ 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 NOZZLE DIAPHRAGM,TURBINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 NUT, nut_style: HEXAGON, nut_height: 0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-9141, 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
520674
NSN: 4730-00-277-9141
FSC: 4730
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 NUT
nut_styleHEXAGON
nut_height0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNJC
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES NOMINAL NUT
surface_treatmentPASSIVATE OVERALL EXCEPT INSERT
width_across_flats0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
NSN4730-00-277-9141
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 520674 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
32-143Interchangeable
interchangeable cross-reference
interchangeable
3/8CD-SInterchangeable
interchangeable cross-reference
interchangeable
171SC545Interchangeable
interchangeable cross-reference
interchangeable
55026Interchangeable
interchangeable cross-reference
interchangeable
89010Interchangeable
interchangeable cross-reference
interchangeable
BEDPAN, STAINLESS STEELInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 520674?
520674 is a NOZZLE DIAPHRAGM,TURBINE.
What parts can replace 520674?
There are 18 known substitutes for 520674: 32-143, 3/8CD-S, 171SC545 and 15 more. Substitute compatibility should be verified for your specific system.
Is 520674 still available?
520674 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