PartsTable
Technical Data Sheet
MS51953-149B ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: LONG, surface_treatment: OXIDE OVERALL, nominal_thread_size: 1.250 INCHES ALL ENDS IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-2091, 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
MS51953-149B
NSN: 4730-00-196-2091
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 ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorLONG
surface_treatmentOXIDE OVERALL
nominal_thread_size1.250 INCHES ALL ENDS IN
nominal_overall_length3.000 INCHES IN
media_for_which_designedFLUID SINGLE RESPONSE
thread_series_designatorNPT ALL ENDS
specification/standard_data81346-ASTM A733 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51953 GOVERNMENT STANDARD
material_document_and_classificationASTM A120 OR A53 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
pipe_wall_thickness_designation_for_which_designedSCHEDULE 40 ALL ENDS
NSN4730-00-196-2091
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51953-149B · 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 OVERALL LENGTH: 3.000 INCHES IN
NOMINAL THREAD SIZE: 1.250 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA: 81346-ASTM A733 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51953 GOVERNMENT STANDARD
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNED: SCHEDULE 40 ALL ENDS
SURFACE TREATMENT: OXIDE OVERALL
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
MEDIA FOR WHICH DESIGNED: FLUID SINGLE RESPONSE
STYLE DESIGNATOR: LONG
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH3.000 INCHES IN
NOMINAL THREAD SIZE1.250 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81346-ASTM A733 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51953 GOVERNMENT STANDARD
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE 40 ALL ENDS
SURFACE TREATMENTOXIDE OVERALL
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
STYLE DESIGNATORLONG
THREAD SERIES DESIGNATORNPT ALL ENDS
NOMINAL OVERALL LENGTH3.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
RD1-2INPIL0TInterchangeable
interchangeable cross-reference
interchangeable
5148Interchangeable
interchangeable cross-reference
interchangeable
8RD3019Interchangeable
interchangeable cross-reference
interchangeable
5-78Interchangeable
interchangeable cross-reference
interchangeable
40273BInterchangeable
interchangeable cross-reference
interchangeable
3030M230036Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51953-149B?
MS51953-149B is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace MS51953-149B?
There are 25 known substitutes for MS51953-149B: RD1-2INPIL0T, 5148, 8RD3019 and 22 more. Substitute compatibility should be verified for your specific system.
Is MS51953-149B still available?
MS51953-149B is currently cancelled.
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