PartsTable
Technical Data Sheet
MS51873-174B ✓ 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 NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE FIRST END, connection_style: PLAIN (PIPE) FIRST END, style_designator: LONG, surface_treatment: OXIDE OVERALL, nominal_thread_size: 1.500 INCHES FIRST END IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-095-6558, 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
MS51873-174B
NSN: 4730-01-095-6558
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeTHREADED EXTERNAL PIPE FIRST END
connection_stylePLAIN (PIPE) FIRST END
style_designatorLONG
surface_treatmentOXIDE OVERALL
nominal_thread_size1.500 INCHES FIRST END IN
nominal_overall_length4.000 INCHES IN
thread_series_designatorNPT FIRST END
nondefinitive_spec/std_data3 TYPE AND EXTRA-STRONG WEIGHT
NSN4730-01-095-6558
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51873-174B · 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
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND EXTRA-STRONG WEIGHT
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
THREAD SERIES DESIGNATOR: NPT FIRST END
NOMINAL THREAD SIZE: 1.500 INCHES FIRST END IN
SURFACE TREATMENT: OXIDE OVERALL
STYLE DESIGNATOR: LONG
CONNECTION STYLE: PLAIN (PIPE) FIRST END
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA3 TYPE AND EXTRA-STRONG WEIGHT
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
THREAD SERIES DESIGNATORNPT FIRST END
NOMINAL THREAD SIZE1.500 INCHES FIRST END IN
SURFACE TREATMENTOXIDE OVERALL
STYLE DESIGNATORLONG
CONNECTION STYLEPLAIN (PIPE) FIRST END
MATERIALSTEEL OVERALL
NOMINAL OVERALL LENGTH4.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
WW-N-351 TY3WTEXTRA-STRONGInterchangeable
interchangeable cross-reference
interchangeable
A733S-199CFBInterchangeable
interchangeable cross-reference
interchangeable
ASTM-A733Interchangeable
interchangeable cross-reference
interchangeable
WWN351TYPE2Interchangeable
interchangeable cross-reference
interchangeable
WW-N-351Interchangeable
interchangeable cross-reference
interchangeable
MS51873-108BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51873-174B?
MS51873-174B is a NIPPLE,PIPE.
What parts can replace MS51873-174B?
There are 17 known substitutes for MS51873-174B: WW-N-351 TY3WTEXTRA-STRONG, A733S-199CFB, ASTM-A733 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51873-174B?
MS51873-174B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-095-6558. This indicates validated use in U.S. government and defense supply chains.
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