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443439 — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

443439: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, thread_size: 1.210 IN. - 18 IN, thread_class: 3A A, thread_length: 0.500 INCHES NOMINAL IN, overall_length: 1.125 INCHES NOMINAL IN, thread_direction: RIGHT-HAND.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-333-7537, 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
443439
NSN: 4730-00-333-7537
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 09310 — SYLTONE INDUSTRIES LLC DBA GARDNER DENVER INC. DIV EMCO WHEATON (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thread_size1.210 IN. - 18 IN
thread_class3A A
thread_length0.500 INCHES NOMINAL IN
overall_length1.125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
length_to_shoulder0.250 INCHES NOMINAL IN
width_across_flats1.250 INCHES NOMINAL IN
screw_thread_locationEXTERNAL
casehardening_indicatorNOT CASEHARDENED
end_item_identificationKPA TRUCK, 2 1/2 TON, 6X6.
smallest_inside_diameter0.6875 INCHES MINIMUM AND 0.6895 INCHES MAXIMUM IN
NSN4730-00-333-7537
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 443439 · 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: 0.250 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD SIZE: 1.210 IN. - 18 IN
•
SCREW THREAD SERIES DESIGNATOR: UNS
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.250 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.250 INCHES NOMINAL IN
THREAD LENGTH0.500 INCHES NOMINAL IN
OVERALL LENGTH1.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE1.210 IN. - 18 IN
SCREW THREAD SERIES DESIGNATORUNS
THREAD CLASS3A A
MAJOR UNTHREADED OUTSIDE DIAMETER1.093 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
4730003337537Reference document
Same NSN cross-reference
Reference document — Informative reference only
P405Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 443439?
443439 is a PACKING NUT.
What parts can replace 443439?
There are 2 known substitutes for 443439: 4730003337537, P405. Substitute compatibility should be verified for your specific system.
What is the NSN for 443439?
443439 is cataloged in the U.S. Government catalog under NSN 4730-00-333-7537. 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.