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Technical Data Sheet

SY/97-37-518 — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

SY/97-37-518: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 4730-01-629-1271, 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
SY/97-37-518
NSN: 4730-01-629-1271
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
Part NumberSY/97-37-518
NSN4730-01-629-1271
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SY/97-37-518 · 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
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 2
00478 PART NO. 8Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
S4808-3233949 PART NO. 8Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 SY/97-37-518?
SY/97-37-518 is a PACKING NUT.
What parts can replace SY/97-37-518?
There are 2 known substitutes for SY/97-37-518: 00478 PART NO. 8, S4808-3233949 PART NO. 8. Substitute compatibility should be verified for your specific system.
What is the NSN for SY/97-37-518?
SY/97-37-518 is cataloged in the U.S. Government catalog under NSN 4730-01-629-1271. This indicates validated use in U.S. government and defense supply chains.
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