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557498 — PLUG,SPRING RETAINER

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

557498: PLUG,SPRING RETAINER.

The PLUG,SPRING RETAINER is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 4730-00-974-0142, 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
557498
NSN: 4730-00-974-0142
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
Part Number557498
NSN4730-00-974-0142
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 557498 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: ALUMINUM ALLOY AMS4150,OUTSIDE SURFACE,ANODIC TREATMENT MIL-A-8625 TYPE 1,ROCKWELL B SCALE 45 MIN HARDNESS,0.250 IN. HEAD H,0.185 IN. O/A LG,0.370 IN. THD LG,0.555 IN. BODY CORE DP,0.262 IN. MIN,0.263 IN. MAX BODY CORE DIA,HEXAGON DRIVE END,WITH 3 SLOTS 0.010 IN. DIA,0.500-20 UNF CLASS 2A THD,0.031 IN. SEAT RADIUS,PLAIN END CONNECTION 0.340 IN. DIA,0.105 IN. LG A
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONALUMINUM ALLOY AMS4150,OUTSIDE SURFACE,ANODIC TREATMENT MIL-A-8625 TYPE 1,ROCKWELL B SCALE 45 MIN HARDNESS,0.250 IN. HEAD H,0.185 IN. O/A LG,0.370 IN. THD LG,0.555 IN. BODY CORE DP,0.262 IN. MIN,0.263 IN. MAX BODY CORE DIA,HEXAGON DRIVE END,WITH 3 SLOTS 0.010 IN. DIA,0.500-20 UNF CLASS 2A THD,0.031 IN. SEAT RADIUS,PLAIN END CONNECTION 0.340 IN. DIA,0.105 IN. LG A
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 557498?
557498 is a PLUG,SPRING RETAINER.
What is the NSN for 557498?
557498 is cataloged in the U.S. Government catalog under NSN 4730-00-974-0142. 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.