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AS5230J0403 — REDUCER,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS5230J0403: REDUCER,BOSS.

The REDUCER,BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 BALL BEARING, surface_treatment: PASSIVATE BALL BEARING, nominal_thread_size: 0.4375 INCHES ALL ENDS IN, thread_quantity_per_inch: 20 ALL ENDS, material_document_and_classification: AMS5639 ASSN STD SINGLE MATERIAL RESPONSE BALL BEARING, part_name_assigned_by_controlling_agency: FITTING, UNION AND REDUCER, FLARELESS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-564-7285, 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
AS5230J0403
NSN: 4730-01-564-7285
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL COMP 304 BALL BEARING
special_featuresNOMINAL TUBE SIZE: .250";NUT STYLE: HEXAGON;NUT LENGTH: 1.141 IN. NOM.;WIDTH ACROSS FLATS: 0.678 IN. MIN. AND 0.691 IN. MAX.;THREAD SERIES: UNJF IN
surface_treatmentPASSIVATE BALL BEARING
nominal_thread_size0.4375 INCHES ALL ENDS IN
thread_quantity_per_inch20 ALL ENDS
material_document_and_classificationAMS5639 ASSN STD SINGLE MATERIAL RESPONSE BALL BEARING
part_name_assigned_by_controlling_agencyFITTING, UNION AND REDUCER, FLARELESS
surface_treatment_document_and_classificationAMS2700 ASSN STD SINGLE TREATMENT RESPONSE BALL BEARING
NSN4730-01-564-7285
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS5230J0403 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS2700 ASSN STD SINGLE TREATMENT RESPONSE BALL BEARING
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5639 ASSN STD SINGLE MATERIAL RESPONSE BALL BEARING
•
NOMINAL THREAD SIZE: 0.4375 INCHES ALL ENDS IN
•
SURFACE TREATMENT: PASSIVATE BALL BEARING
•
THREAD QUANTITY PER INCH: 20 ALL ENDS
•
MATERIAL: STEEL COMP 304 BALL BEARING
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS2700 ASSN STD SINGLE TREATMENT RESPONSE BALL BEARING
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5639 ASSN STD SINGLE MATERIAL RESPONSE BALL BEARING
NOMINAL THREAD SIZE0.4375 INCHES ALL ENDS IN
SPECIAL FEATURESNOMINAL TUBE SIZE: .250";NUT STYLE: HEXAGON;NUT LENGTH: 1.141 IN. NOM.;WIDTH ACROSS FLATS: 0.678 IN. MIN. AND 0.691 IN. MAX.;THREAD SERIES: UNJF IN
SURFACE TREATMENTPASSIVATE BALL BEARING
PART NAME ASSIGNED BY CONTROLLING AGENCYFITTING, UNION AND REDUCER, FLARELESS
THREAD QUANTITY PER INCH20 ALL ENDS
MATERIALSTEEL COMP 304 BALL BEARING
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 1
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is AS5230J0403?
AS5230J0403 is a REDUCER,BOSS.
What parts can replace AS5230J0403?
There is 1 known substitute for AS5230J0403: SAE-AS18280. Substitute compatibility should be verified for your specific system.
What is the NSN for AS5230J0403?
AS5230J0403 is cataloged in the U.S. Government catalog under NSN 4730-01-564-7285. This indicates validated use in U.S. government and defense supply chains.
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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.