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MS51843-23 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS51843-23: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 12L14 OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-173-1884, 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
MS51843-23
NSN: 4730-00-173-1884
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 98255 — DRS SUSTAINMENT SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
seat_angle12.0 DEGREES FIRST END
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
surface_treatmentCADMIUM OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES ALL ENDS IN
maximum_operating_temp121.0 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length1.130 INCHES IN
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNF ALL ENDS
NSN4730-00-173-1884
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51843-23 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 PREFORMED PACKING AND 1 TUBE COUPLING NUT W/SLEEVE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 1.130 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 PREFORMED PACKING AND 1 TUBE COUPLING NUT W/SLEEVE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEFLARELESS (TUBE) FIRST END
NOMINAL OVERALL LENGTH1.130 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SUBSTITUTES & CROSS-REFERENCES 7
MIL-DTL-18866Reference document
Same NSN cross-reference
Reference document — Identification reference
MS51843-3ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
60-615 PIECE 442Reference document
Same NSN cross-reference
Reference document — Secondary reference
273-0473-008Reference document
Same NSN cross-reference
Reference document — Secondary reference
10544-33-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730001731884Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51843-23?
MS51843-23 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51843-23?
There are 7 known substitutes for MS51843-23: MIL-DTL-18866, MS51843-3A, 60-615 PIECE 442 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51843-23?
MS51843-23 is cataloged in the U.S. Government catalog under NSN 4730-00-173-1884. 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.