PartsTable
Technical Data Sheet
MS20823-4 ✓ Verified by PartsTable
· HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The ADAPTER,STRAIGHT,PIPE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OR STEEL COMP 1141 OVERALL, flow_angle: 45.0 DEGREES, leg_length: 0.703 INCHES NOMINAL FIRST END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A FIRST END A, connection_type: THREADED EXTERNAL PIPE SECOND END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-231-3960, 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
MS20823-4
NSN: 4730-00-231-3960
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 1137 OR STEEL COMP 1141 OVERALL
flow_angle45.0 DEGREES
leg_length0.703 INCHES NOMINAL FIRST END IN
seat_angle37.0 DEGREES FIRST END
thread_class3A FIRST END A
connection_typeTHREADED EXTERNAL PIPE SECOND END
connection_stylePLAIN (PIPE) SECOND END
surface_treatmentCADMIUM AND CHROMATE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END IN
maximum_operating_temp225.0 FAHRENHEIT SINGLE RESPONSE DEGF
end_item_identificationAIRCRAFT APPLICATION
NSN4730-00-231-3960
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS20823-4 · 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
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
CONNECTION STYLE: FLARED (TUBE) FIRST END
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
MATERIAL: STEEL COMP 1137 OR STEEL COMP 1141 OVERALL
MAXIMUM OPERATING TEMP: 225.0 FAHRENHEIT SINGLE RESPONSE DEGF
MATERIAL DOCUMENT AND CLASSIFICATION: 66,AISI/SAE C1137 OR C1141 FED STD SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE: 37.0 DEGREES FIRST END
SPECIFICATION/STANDARD DATA: 96906-MS20823 GOVERNMENT STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
CONNECTION STYLEFLARED (TUBE) FIRST END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
MATERIALSTEEL COMP 1137 OR STEEL COMP 1141 OVERALL
MAXIMUM OPERATING TEMP225.0 FAHRENHEIT SINGLE RESPONSE DEGF
MATERIAL DOCUMENT AND CLASSIFICATION66,AISI/SAE C1137 OR C1141 FED STD SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE37.0 DEGREES FIRST END
SPECIFICATION/STANDARD DATA96906-MS20823 GOVERNMENT STANDARD
FLOW ANGLE45.0 DEGREES
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
MS20823-8JInterchangeable
interchangeable cross-reference
interchangeable
AS5196J0806Interchangeable
interchangeable cross-reference
interchangeable
AS5196J1212Interchangeable
interchangeable cross-reference
interchangeable
AN823-12JInterchangeable
interchangeable cross-reference
interchangeable
AS5196Interchangeable
interchangeable cross-reference
interchangeable
AS48421/1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS20823-4?
MS20823-4 is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace MS20823-4?
There are 30 known substitutes for MS20823-4: MS20823-8J, AS5196J0806, AS5196J1212 and 27 more. Substitute compatibility should be verified for your specific system.
Is MS20823-4 still available?
MS20823-4 is currently cancelled.
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