PartsTable
Technical Data Sheet
13K3 ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, leg_length: 1.000 INCHES NOMINAL FIRST END IN, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 2B FIRST END, connection_type: THREADED EXTERNAL TUBE SECOND END, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-808-6668, 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
13K3
NSN: 4730-00-808-6668
FSC: 4730
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
leg_length1.000 INCHES NOMINAL FIRST END IN
seat_angle37.0 DEGREES ALL ENDS
thread_class2B FIRST END
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES ALL ENDS IN
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNF ALL ENDS
nondefinitive_spec/std_data9B FIGURE
NSN4730-00-808-6668
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 13K3 · 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
NONDEFINITIVE SPEC/STD DATA: 9B FIGURE
LEG LENGTH: 0.890 INCHES NOMINAL SECOND END IN
THREAD CLASS: 2A THIRD END A
CONNECTION TYPE: THREADED EXTERNAL TUBE SECOND END
MAXIMUM OPERATING TEMP: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
THREAD SERIES DESIGNATOR: UNF ALL ENDS
MEDIA FOR WHICH DESIGNED: HYDRAULIC FLUID SINGLE RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA9B FIGURE
LEG LENGTH0.890 INCHES NOMINAL SECOND END IN
THREAD CLASS2A THIRD END A
THREAD CLASS2A SECOND END A
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND END
MAXIMUM OPERATING TEMP250.0 FAHRENHEIT SINGLE RESPONSE DEGF
THREAD SERIES DESIGNATORUNF ALL ENDS
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID SINGLE RESPONSE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONJ514 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SEAT ANGLE37.0 DEGREES ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
434996Interchangeable
interchangeable cross-reference
interchangeable
72532981Interchangeable
interchangeable cross-reference
interchangeable
RAS-3300-4Interchangeable
interchangeable cross-reference
interchangeable
MS51523B4Interchangeable
Same NIIN cross-reference
interchangeable
4R6XSInterchangeable
Same NIIN cross-reference
interchangeable
4R6BXInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 13K3?
13K3 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 13K3?
There are 9 known substitutes for 13K3: 434996, 72532981, RAS-3300-4 and 6 more. Substitute compatibility should be verified for your specific system.
Is 13K3 still available?
13K3 is currently cancelled.
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