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MS51887-89 ✓ 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 CONNECTOR,PLUG,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: IRON CAST UNS F22400 OR IRON CAST UNS F22200, style_designator: INSIDE HEXAGON OR OCTAGON, external_thread_size: 3.000-8, internal_thread_size: 0.750-14, external_thread_direction: RIGHT-HAND, internal_thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-0861, 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
MS51887-89
NSN: 4730-00-196-0861
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialIRON CAST UNS F22400 OR IRON CAST UNS F22200
style_designatorINSIDE HEXAGON OR OCTAGON
external_thread_size3.000-8
internal_thread_size0.750-14
external_thread_directionRIGHT-HAND
internal_thread_directionRIGHT-HAND
nondefinitive_spec/std_data2 TYPE AND A STYLE
working_pressure_and_service_type150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL STEAM LBS
material_document_and_classificationQQ-I-666, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE AND QQ-I-666, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
external_screw_thread_series_designatorNPT
internal_screw_thread_series_designatorNPT
NSN4730-00-196-0861
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51887-89 · 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
•
EXTERNAL SCREW THREAD SERIES DESIGNATOR: NPT
•
EXTERNAL THREAD DIRECTION: RIGHT-HAND
•
INTERNAL THREAD DIRECTION: RIGHT-HAND
•
INTERNAL SCREW THREAD SERIES DESIGNATOR: NPT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-I-666, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE AND QQ-I-666, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
•
MATERIAL: IRON CAST UNS F22400 OR IRON CAST UNS F22200
•
STYLE DESIGNATOR: INSIDE HEXAGON OR OCTAGON
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND A STYLE
TECHNICAL CHARACTERISTICS (FLIS)
EXTERNAL SCREW THREAD SERIES DESIGNATORNPT
EXTERNAL THREAD DIRECTIONRIGHT-HAND
INTERNAL THREAD DIRECTIONRIGHT-HAND
INTERNAL SCREW THREAD SERIES DESIGNATORNPT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-I-666, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE AND QQ-I-666, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE
MATERIALIRON CAST UNS F22400 OR IRON CAST UNS F22200
STYLE DESIGNATORINSIDE HEXAGON OR OCTAGON
NONDEFINITIVE SPEC/STD DATA2 TYPE AND A STYLE
WORKING PRESSURE AND SERVICE TYPE150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL STEAM LBS
EXTERNAL THREAD SIZE3.000-8
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
6577Interchangeable
interchangeable cross-reference
interchangeable
6577-1BInterchangeable
interchangeable cross-reference
interchangeable
146063Interchangeable
interchangeable cross-reference
interchangeable
WWP471Interchangeable
interchangeable cross-reference
interchangeable
142269Interchangeable
interchangeable cross-reference
interchangeable
MS39232-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51887-89?
MS51887-89 is a CONNECTOR,PLUG,ELECTRICAL.
What parts can replace MS51887-89?
There are 17 known substitutes for MS51887-89: 6577, 6577-1B, 146063 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51887-89?
MS51887-89 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-0861. 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