PartsTable
Technical Data Sheet
4253-138-26 ✓ 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

DRIVE,ENGINE,ELECTRICAL STARTER. Key specifications include material: IRON OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.500 INCHES NOMINAL ALL ENDS IN, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, operating_pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-249-3919, 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
4253-138-26
NSN: 4730-00-249-3919
FSC: 4730
CAGE: 83395 — CONSOLIDATED WELDING AND ENGINEERING CO (USA)
SPECIFICATIONS
materialIRON OVERALL
flow_angle90.0 DEGREES
leg_length1.500 INCHES NOMINAL ALL ENDS IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
nominal_thread_size1.000 INCHES ALL ENDS IN
maximum_operating_temp65.6 CELSIUS SECOND RESPONSE DEGC
media_for_which_designedWATER-OIL-GAS SECOND RESPONSE
thread_series_designatorNPT ALL ENDS
nondefinitive_spec/std_data1 TYPE
material_document_and_classificationASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-249-3919
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4253-138-26 · 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: IRON OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FLOW ANGLE: 90.0 DEGREES
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
THREAD SERIES DESIGNATOR: NPT ALL ENDS
NOMINAL THREAD SIZE: 1.000 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP: 260.0 CELSIUS FIRST RESPONSE DEGC
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALIRON OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FLOW ANGLE90.0 DEGREES
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
THREAD SERIES DESIGNATORNPT ALL ENDS
NOMINAL THREAD SIZE1.000 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP260.0 CELSIUS FIRST RESPONSE DEGC
MAXIMUM OPERATING TEMP65.6 CELSIUS SECOND RESPONSE DEGC
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
74 3/4Interchangeable
interchangeable cross-reference
interchangeable
QT74X 3/4INInterchangeable
interchangeable cross-reference
interchangeable
74 3/4INInterchangeable
interchangeable cross-reference
interchangeable
53604Interchangeable
interchangeable cross-reference
interchangeable
890Interchangeable
interchangeable cross-reference
interchangeable
955535Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4253-138-26?
4253-138-26 is a DRIVE,ENGINE,ELECTRICAL STARTER.
What parts can replace 4253-138-26?
There are 21 known substitutes for 4253-138-26: 74 3/4, QT74X 3/4IN, 74 3/4IN and 18 more. Substitute compatibility should be verified for your specific system.
Is 4253-138-26 still available?
4253-138-26 is currently cancelled.
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