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Technical Data Sheet
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ST9M540 ✓ 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 CLAMP,HOSE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, overall_width: 0.562 INCHES NOMINAL IN, inside_diameter: 3.625 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN, style_designator: WIRE, surface_treatment: PASSIVATE OVERALL, fastening_device_type: SLOTTED HEXAGON HEAD SCREW. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-0424, 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
ST9M540
NSN: 4730-00-278-0424
FSC: 4730
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
overall_width0.562 INCHES NOMINAL IN
inside_diameter3.625 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN
style_designatorWIRE
surface_treatmentPASSIVATE OVERALL
fastening_device_typeSLOTTED HEXAGON HEAD SCREW
NSN4730-00-278-0424
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST9M540 · 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
•
FASTENING DEVICE TYPE: THUMB HEAD SCREW
•
MATERIAL: STEEL CORROSION RESISTING THUMBSCREW
•
SURFACE TREATMENT: PASSIVATE BAND
•
STYLE DESIGNATOR: BAND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
FASTENING DEVICE TYPETHUMB HEAD SCREW
MATERIALSTEEL CORROSION RESISTING THUMBSCREW
SURFACE TREATMENTPASSIVATE BAND
SPECIAL FEATURESSINGLE WITH SHOE
END ITEM IDENTIFICATIONGRUMAN A-10 AIRCRAFT
STYLE DESIGNATORBAND
MATERIALSTEEL COMP 301 BAND
INSIDE DIAMETER1.375 INCHES MINIMUM AND 1.812 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
9224Interchangeable
interchangeable cross-reference
interchangeable
AN3058-24Interchangeable
interchangeable cross-reference
interchangeable
82312S4105-500370PC239Interchangeable
interchangeable cross-reference
interchangeable
H9224Interchangeable
interchangeable cross-reference
interchangeable
82311S4105-502522PC8Interchangeable
interchangeable cross-reference
interchangeable
TCP24PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST9M540?
ST9M540 is a CLAMP,HOSE.
What parts can replace ST9M540?
There are 24 known substitutes for ST9M540: 9224, AN3058-24, 82312S4105-500370PC239 and 21 more. Substitute compatibility should be verified for your specific system.
Is ST9M540 still available?
ST9M540 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026