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3054741057 PIECE 159 — Technical Data Sheet

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— · 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 PACKING NUT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, style_designator: HEXAGON, INTERNAL THREAD, SHOULDERED, casehardening_indicator: NOT CASEHARDENED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-01-122-5978, 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
3054741057 PIECE 159
NSN: 4730-01-122-5978
FSC: 4730
CAGE: 17590 — DIAMOND POWER INTERNATIONAL, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY
style_designatorHEXAGON, INTERNAL THREAD, SHOULDERED
casehardening_indicatorNOT CASEHARDENED
NSN4730-01-122-5978
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3054741057 PIECE 159 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
STYLE DESIGNATOR: HEXAGON, INTERNAL THREAD, SHOULDERED
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
CASEHARDENING INDICATORNOT CASEHARDENED
STYLE DESIGNATORHEXAGON, INTERNAL THREAD, SHOULDERED
MATERIALCOPPER ALLOY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
FM15570InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
FM1557-DInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
301142-0118InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
302032-0119InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
962032-0118InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
305474-1057InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3054741057 PIECE 159?
3054741057 PIECE 159 is a PACKING NUT.
What parts can replace 3054741057 PIECE 159?
There are 13 known substitutes for 3054741057 PIECE 159: FM15570, FM1557-D, 301142-0118 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3054741057 PIECE 159?
3054741057 PIECE 159 is cataloged in the Federal Logistics Information System under NSN 4730-01-122-5978. 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: September 2026