PartsTable
Technical Data Sheet
PartsTable / COMPONENT / ST9M540-56
ST9M540-56 ✓ 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 inside_diameter: 1.328 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN, style_designator: CLAMP W/TIE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-394-6649, 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
ST9M540-56
NSN: 4730-01-394-6649
FSC: 4730
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
inside_diameter1.328 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
style_designatorCLAMP W/TIE
NSN4730-01-394-6649
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST9M540-56 · 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
•
INSIDE DIAMETER: 1.328 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CLAMP W/TIE
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER1.328 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
STYLE DESIGNATORCLAMP W/TIE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
AN737TW58SSInterchangeable
interchangeable cross-reference
interchangeable
224Interchangeable
interchangeable cross-reference
interchangeable
ST9M540Interchangeable
interchangeable cross-reference
interchangeable
9456H BInterchangeable
interchangeable cross-reference
interchangeable
WWD128Interchangeable
interchangeable cross-reference
interchangeable
9456Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST9M540-56?
ST9M540-56 is a CLAMP,HOSE.
What parts can replace ST9M540-56?
There are 10 known substitutes for ST9M540-56: AN737TW58SS, 224, ST9M540 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST9M540-56?
ST9M540-56 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-394-6649. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026