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S44181 — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

S44181: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340, thread_size: 5/8-20, thread_length: 0.020 INCHES NOMINAL IN, overall_length: 0.625 INCHES NOMINAL IN, style_designator: HEXAGON, INTERNAL THREAD, SHOULDERED, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-123-4151, 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
S44181
NSN: 4730-01-123-4151
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 12511 — SIMMONDS PRECISION PRODUCTS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4340
thread_size5/8-20
thread_length0.020 INCHES NOMINAL IN
overall_length0.625 INCHES NOMINAL IN
style_designatorHEXAGON, INTERNAL THREAD, SHOULDERED
thread_directionRIGHT-HAND
surface_treatmentCADMIUM
length_to_shoulder0.562 INCHES NOMINAL IN
width_across_flats1.010 INCHES NOMINAL IN
screw_thread_locationINTERNAL
casehardening_indicatorCASEHARDENED
material_hardness_rating32.0 ROCKWELL A MINIMUM AND 36.0 ROCKWELL A MAXIMUM
NSN4730-01-123-4151
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S44181 · 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: 0.562 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.010 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 32.0 ROCKWELL A MINIMUM AND 36.0 ROCKWELL A MAXIMUM
•
THREAD LENGTH: 0.020 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HEXAGON, INTERNAL THREAD, SHOULDERED
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: CASEHARDENED
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.562 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.010 INCHES NOMINAL IN
MATERIAL HARDNESS RATING32.0 ROCKWELL A MINIMUM AND 36.0 ROCKWELL A MAXIMUM
THREAD LENGTH0.020 INCHES NOMINAL IN
STYLE DESIGNATORHEXAGON, INTERNAL THREAD, SHOULDERED
OVERALL LENGTH0.625 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORCASEHARDENED
THREAD SIZE5/8-20
SCREW THREAD SERIES DESIGNATORUNEF
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

No substitute or cross-reference records for this part.

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 S44181?
S44181 is a PACKING NUT.
What is the NSN for S44181?
S44181 is cataloged in the U.S. Government catalog under NSN 4730-01-123-4151. 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.