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ST9M540-26 — MICROCIRCUIT,DIGITAL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

ST9M540-26: MICROCIRCUIT,DIGITAL.

The MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OR STEEL COMP 304 BAND, overall_width: 0.563 INCHES NOMINAL IN, inside_diameter: 0.563 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN, special_features: WEAPON SYSTEM ESSENTIAL, style_designator: WIRE, fastening_device_type: SLOTTED HEXAGON HEAD SCREW. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-211-8445, 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
ST9M540-26
NSN: 4730-01-211-8445
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OR STEEL COMP 304 BAND
overall_width0.563 INCHES NOMINAL IN
inside_diameter0.563 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
special_featuresWEAPON SYSTEM ESSENTIAL
style_designatorWIRE
fastening_device_typeSLOTTED HEXAGON HEAD SCREW
end_item_identificationAIRCRAFT, GALAXY C-5
criticality_code_justificationFEAT
NSN4730-01-211-8445
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST9M540-26 · 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
•
FASTENING DEVICE TYPE: SLOTTED HEXAGON HEAD SCREW
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
STYLE DESIGNATOR: WIRE
•
INSIDE DIAMETER: 0.563 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 316 OR STEEL COMP 304 BAND
TECHNICAL CHARACTERISTICS
FASTENING DEVICE TYPESLOTTED HEXAGON HEAD SCREW
CRITICALITY CODE JUSTIFICATIONFEAT
STYLE DESIGNATORWIRE
OVERALL WIDTH0.563 INCHES NOMINAL IN
INSIDE DIAMETER0.563 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
END ITEM IDENTIFICATIONAIRCRAFT, GALAXY C-5
MATERIALSTEEL COMP 316 OR STEEL COMP 304 BAND
MATERIALSTEEL COMP 316 OR STEEL COMP 304 SCREW
SUBSTITUTES & CROSS-REFERENCES 6
WWD-26Reference document
Same NSN cross-reference
Reference document — Secondary reference
90781 CRES 316Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
9206Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
10108972Reference document
Same NSN cross-reference
Reference document — Informative reference only
SIZE 6, CRES 31Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
90781Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST9M540-26?
ST9M540-26 is a MICROCIRCUIT,DIGITAL.
What parts can replace ST9M540-26?
There are 6 known substitutes for ST9M540-26: WWD-26, 90781 CRES 316, 9206 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST9M540-26?
ST9M540-26 is cataloged in the U.S. Government catalog under NSN 4730-01-211-8445. This indicates validated use in U.S. government and defense supply chains.
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