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3F3664-15 — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3F3664-15: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include thread_size: 2-3/8IN-12 IN, thread_class: 3B, hole_diameter: 0.312 INCHES NOMINAL IN, thread_length: 0.375 INCHES NOMINAL IN, overall_length: 2.000 INCHES NOMINAL IN, style_designator: ROUND, INTERNAL THREAD, SHOULDERED. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-300-7607, 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
3F3664-15
NSN: 4730-00-300-7607
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
thread_size2-3/8IN-12 IN
thread_class3B
hole_diameter0.312 INCHES NOMINAL IN
thread_length0.375 INCHES NOMINAL IN
overall_length2.000 INCHES NOMINAL IN
style_designatorROUND, INTERNAL THREAD, SHOULDERED
thread_directionRIGHT-HAND
length_to_shoulder1.812 INCHES NOMINAL IN
protrusion_quantity3
hole_or_slot_quantity3
screw_thread_locationINTERNAL
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-300-7607
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3F3664-15 · 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
•
LENGTH TO SHOULDER: 1.812 INCHES NOMINAL IN
•
HOLE OR SLOT QUANTITY: 3
•
THREAD LENGTH: 0.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND, INTERNAL THREAD, SHOULDERED
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD SIZE: 2-3/8IN-12 IN
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER1.812 INCHES NOMINAL IN
HOLE OR SLOT QUANTITY3
THREAD LENGTH0.375 INCHES NOMINAL IN
STYLE DESIGNATORROUND, INTERNAL THREAD, SHOULDERED
OVERALL LENGTH2.000 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE2-3/8IN-12 IN
PROTRUSION QUANTITY3
SCREW THREAD SERIES DESIGNATORUN
SUBSTITUTES & CROSS-REFERENCES 1
620637Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3F3664-15?
3F3664-15 is a PACKING NUT.
What parts can replace 3F3664-15?
There is 1 known substitute for 3F3664-15: 620637. Substitute compatibility should be verified for your specific system.
What is the NSN for 3F3664-15?
3F3664-15 is cataloged in the U.S. Government catalog under NSN 4730-00-300-7607. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.