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81417S41-573PC11 — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

81417S41-573PC11: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include material: STEEL, thread_size: 0.375IN-12 IN, thread_class: 2A A, thread_length: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN, overall_length: 1.850 INCHES NOMINAL IN, style_designator: HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-330-4520, 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
81417S41-573PC11
NSN: 4730-00-330-4520
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL
thread_size0.375IN-12 IN
thread_class2A A
thread_length0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
overall_length1.850 INCHES NOMINAL IN
style_designatorHEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER
thread_directionRIGHT-HAND
surface_treatmentCADMIUM
length_to_shoulder0.484 INCHES NOMINAL IN
width_across_flats1.654 INCHES NOMINAL IN
screw_thread_locationEXTERNAL
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-330-4520
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 81417S41-573PC11 · 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: 0.484 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.654 INCHES NOMINAL IN
•
LARGEST INSIDE DIAMETER: 0.886 INCHES MINIMUM AND 0.898 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.484 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.654 INCHES NOMINAL IN
LARGEST INSIDE DIAMETER0.886 INCHES MINIMUM AND 0.898 INCHES MAXIMUM IN
THREAD LENGTH0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
STYLE DESIGNATORHEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER
OVERALL LENGTH1.850 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE0.375IN-12 IN
SCREW THREAD SERIES DESIGNATORUNF
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 9
NT7840Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
81417S41-572PC11Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
81417S41-230PC11Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
72-77320-168Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GJN77-93Reference document
Same NSN cross-reference
Reference document — Secondary reference
GJN77-92PC11Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 81417S41-573PC11?
81417S41-573PC11 is a PACKING NUT.
What parts can replace 81417S41-573PC11?
There are 9 known substitutes for 81417S41-573PC11: NT7840, 81417S41-572PC11, 81417S41-230PC11 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81417S41-573PC11?
81417S41-573PC11 is cataloged in the U.S. Government catalog under NSN 4730-00-330-4520. 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.