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2528251 — RETAINER,COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2528251: RETAINER,COUPLING.

The RETAINER,COUPLING is a the manufacturer industrial component. Key specifications include material: STEEL, thickness: 0.312 INCHES IN, inside_diameter: 0.3418 INCHES MINIMUM AND 0.3518 INCHES MAXIMUM IN, outside_diameter: 2.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-598-3427, 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
2528251
NSN: 4730-01-598-3427
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL
thickness0.312 INCHES IN
inside_diameter0.3418 INCHES MINIMUM AND 0.3518 INCHES MAXIMUM IN
outside_diameter2.000 INCHES NOMINAL IN
special_featuresMATERIAL:STEEL 1020, SUB:0D 8853 TYPE A, GRADE II, ALT:QQ-S-634, C1020; NEXT ASSEMBLY:2527215 AND 2862408; USED ON:LM 2527215 AND LM 2862408
NSN4730-01-598-3427
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2528251 · 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
•
THICKNESS: 0.312 INCHES IN
•
OUTSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.3418 INCHES MINIMUM AND 0.3518 INCHES MAXIMUM IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
THICKNESS0.312 INCHES IN
OUTSIDE DIAMETER2.000 INCHES NOMINAL IN
INSIDE DIAMETER0.3418 INCHES MINIMUM AND 0.3518 INCHES MAXIMUM IN
SPECIAL FEATURESMATERIAL:STEEL 1020, SUB:0D 8853 TYPE A, GRADE II, ALT:QQ-S-634, C1020; NEXT ASSEMBLY:2527215 AND 2862408; USED ON:LM 2527215 AND LM 2862408
MATERIALSTEEL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2528251?
2528251 is a RETAINER,COUPLING.
What is the NSN for 2528251?
2528251 is cataloged in the U.S. Government catalog under NSN 4730-01-598-3427. 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.