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PartsTable / COMPONENT / MS51823-6
MS51823-6 ✓ 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,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 12L14 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.840 INCHES NOMINAL IN, seat_angle: 45.00 DEGREES NOMINAL, thread_class: 2B, thread_series: UNF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-463-0689, 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
MS51823-6
NSN: 4730-00-463-0689
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
nut_styleTUBE COUPLING
nut_height0.840 INCHES NOMINAL IN
seat_angle45.00 DEGREES NOMINAL
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
fabrication_methodMACHINED
length_to_shoulder0.599 INCHES MINIMUM AND 0.604 INCHES MAXIMUM IN
width_across_flats0.875 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
NSN4730-00-463-0689
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51823-6 · 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
•
THREAD QUANTITY PER INCH: 16
•
NUT STYLE: TUBE COUPLING
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
MATERIAL: STEEL COMP 12L14 OVERALL
•
WIDTH ACROSS FLATS: 0.875 INCHES NOMINAL IN
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.500 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
SMALLEST INSIDE DIAMETER: 0.505 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH16
NUT STYLETUBE COUPLING
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MATERIALSTEEL COMP 12L14 OVERALL
WIDTH ACROSS FLATS0.875 INCHES NOMINAL IN
NOMINAL TUBE OUTSIDE DIAMETER0.500 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SMALLEST INSIDE DIAMETER0.505 INCHES NOMINAL IN
NUT HEIGHT0.840 INCHES NOMINAL IN
THREAD SERIESUNF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
NUT-1211Interchangeable
interchangeable cross-reference
interchangeable
8-080110CInterchangeable
interchangeable cross-reference
interchangeable
7105X8Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-18866Interchangeable
Same NIIN cross-reference
interchangeable
8-BU-S CNCInterchangeable
Same NIIN cross-reference
interchangeable
4730004630689Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51823-6?
MS51823-6 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51823-6?
There are 6 known substitutes for MS51823-6: NUT-1211, 8-080110C, 7105X8 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51823-6?
MS51823-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-463-0689. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026