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PartsTable / COMPONENT / MS51953-115
MS51953-115 ✓ 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 ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: LONG, surface_treatment: ZINC OVERALL, nominal_thread_size: 0.750 INCHES ALL ENDS 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 4730-01-033-3444, 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
MS51953-115
NSN: 4730-01-033-3444
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_treatmentZINC OVERALL
nominal_thread_size0.750 INCHES ALL ENDS IN
nominal_overall_length12.000 INCHES IN
thread_series_designatorNPT ALL ENDS
specification/standard_data81346-ASTMA733 GOVERNMENT SPECIFICATION AND 96906-MS51953 GOVERNMENT STANDARD
material_document_and_classificationASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-033-3444
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51953-115 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
MATERIAL: STEEL OVERALL
•
NOMINAL OVERALL LENGTH: 12.000 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTMA733 GOVERNMENT SPECIFICATION AND 96906-MS51953 GOVERNMENT STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIALSTEEL OVERALL
NOMINAL OVERALL LENGTH12.000 INCHES IN
SPECIFICATION/STANDARD DATA81346-ASTMA733 GOVERNMENT SPECIFICATION AND 96906-MS51953 GOVERNMENT STANDARD
STYLE DESIGNATORLONG
SURFACE TREATMENTZINC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
F1399DInterchangeable
interchangeable cross-reference
interchangeable
102966Interchangeable
interchangeable cross-reference
interchangeable
4478Interchangeable
interchangeable cross-reference
interchangeable
ASTM-A733Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51953-115?
MS51953-115 is a NIPPLE,PIPE.
What parts can replace MS51953-115?
There are 4 known substitutes for MS51953-115: F1399D, 102966, 4478 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51953-115?
MS51953-115 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-033-3444. 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