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ST9M540-34 — Technical Data Sheet

✓ 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 CONNECTOR SET,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OR STEEL THUMBSCREW, overall_width: 0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN, inside_diameter: 0.938 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN, special_features: SINGLE WITH SHOE, style_designator: BAND, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-555-1352, 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
ST9M540-34
NSN: 4730-00-555-1352
FSC: 4730
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OR STEEL THUMBSCREW
overall_width0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
inside_diameter0.938 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
special_featuresSINGLE WITH SHOE
style_designatorBAND
surface_treatmentPASSIVATE OVERALL
fastening_device_typeTHUMB HEAD SCREW
end_item_identificationGRUMMAN AEROSPACE CORP A10 AIRCRAFT
NSN4730-00-555-1352
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST9M540-34 · 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: STEEL CORROSION RESISTING OR STEEL THUMBSCREW
•
STYLE DESIGNATOR: BAND
•
INSIDE DIAMETER: 0.938 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
•
FASTENING DEVICE TYPE: THUMB HEAD SCREW
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING OR STEEL THUMBSCREW
MATERIALSTEEL COMP 302 BAND
STYLE DESIGNATORBAND
INSIDE DIAMETER0.938 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONGRUMMAN AEROSPACE CORP A10 AIRCRAFT
SPECIAL FEATURESSINGLE WITH SHOE
FASTENING DEVICE TYPETHUMB HEAD SCREW
SURFACE TREATMENTPASSIVATE OVERALL
OVERALL WIDTH0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 40
9212Interchangeable
interchangeable cross-reference
interchangeable
H9212Interchangeable
interchangeable cross-reference
interchangeable
AN73TW56-66Interchangeable
interchangeable cross-reference
interchangeable
HK9C24-56/66Interchangeable
interchangeable cross-reference
interchangeable
AN737TW-56/66Interchangeable
interchangeable cross-reference
interchangeable
NAS1924-66Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST9M540-34?
ST9M540-34 is a CONNECTOR SET,ELECTRICAL.
What parts can replace ST9M540-34?
There are 40 known substitutes for ST9M540-34: 9212, H9212, AN73TW56-66 and 37 more. Substitute compatibility should be verified for your specific system.
Is ST9M540-34 still available?
ST9M540-34 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: September 2026