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9M688A10 ✓ 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 NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.690 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, fabrication_method: MACHINED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-184-1996, 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
9M688A10
NSN: 4730-01-184-1996
FSC: 4730
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
nut_styleTUBE COUPLING
nut_height0.690 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
fabrication_methodMACHINED
length_to_shoulder0.565 INCHES NOMINAL IN
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.625 INCHES IN
smallest_inside_diameter0.348 INCHES NOMINAL IN
thread_quantity_per_inch18
nominal_tube_outside_diameter0.312 INCHES IN
NSN4730-01-184-1996
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 9M688A10 · 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
•
NUT STYLE: TUBE COUPLING
•
MATERIAL: ALUMINUM ALLOY 7075 OVERALL
•
THREAD QUANTITY PER INCH: 18
•
SMALLEST INSIDE DIAMETER: 0.348 INCHES NOMINAL IN
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.312 INCHES IN
•
LENGTH TO SHOULDER: 0.565 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLETUBE COUPLING
MATERIALALUMINUM ALLOY 7075 OVERALL
THREAD QUANTITY PER INCH18
SMALLEST INSIDE DIAMETER0.348 INCHES NOMINAL IN
NOMINAL TUBE OUTSIDE DIAMETER0.312 INCHES IN
LENGTH TO SHOULDER0.565 INCHES NOMINAL IN
THREAD SERIESUNF
NOMINAL THREAD SIZE0.625 INCHES IN
FABRICATION METHODMACHINED
NUT HEIGHT0.690 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
3-12706-053Interchangeable
interchangeable cross-reference
interchangeable
840479-3Interchangeable
interchangeable cross-reference
interchangeable
17-14602-3Interchangeable
interchangeable cross-reference
interchangeable
9M688Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9M688A10?
9M688A10 is a NUT,TUBE COUPLING.
What parts can replace 9M688A10?
There are 4 known substitutes for 9M688A10: 3-12706-053, 840479-3, 17-14602-3 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9M688A10?
9M688A10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-184-1996. 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