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MS24403S4 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS24403S4: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 347 OVERALL, leg_length: 0.859 INCHES NOMINAL ALL ENDS IN, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARED (TUBE) ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-278-8577, 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
MS24403S4
NSN: 4730-00-278-8577
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 347 OVERALL
leg_length0.859 INCHES NOMINAL ALL ENDS IN
seat_angle37.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARED (TUBE) ALL ENDS
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.438 INCHES ALL ENDS IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data88044-AN827 GOVERNMENT STANDARD AND 81343-AS4841 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-00-278-8577
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS24403S4 · 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
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
LEG LENGTH: 0.859 INCHES NOMINAL ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
SEAT ANGLE: 37.0 DEGREES ALL ENDS
•
SPECIFICATION/STANDARD DATA: 88044-AN827 GOVERNMENT STANDARD AND 81343-AS4841 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED (TUBE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
LEG LENGTH0.859 INCHES NOMINAL ALL ENDS IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SEAT ANGLE37.0 DEGREES ALL ENDS
SPECIFICATION/STANDARD DATA88044-AN827 GOVERNMENT STANDARD AND 81343-AS4841 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A ALL ENDS 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 5
AS4841Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN827-4SReference document
Same NSN cross-reference
Reference document — Secondary reference
AS1036S04040404Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
MIL-F-5509Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is MS24403S4?
MS24403S4 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS24403S4?
There are 5 known substitutes for MS24403S4: AS4841, AN827-4S, AS1036S04040404 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS24403S4?
MS24403S4 is cataloged in the U.S. Government catalog under NSN 4730-00-278-8577. 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.