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Technical Data Sheet
PartsTable / COMPONENT / MS51953-218B
MS51953-218B ✓ 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, leg_length: 1.000 INCHES MAXIMUM ALL ENDS IN, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: SHORT, surface_treatment: OXIDE OR ZINC OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-2076, 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
MS51953-218B
NSN: 4730-00-196-2076
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
leg_length1.000 INCHES MAXIMUM ALL ENDS IN
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorSHORT
surface_treatmentOXIDE OR ZINC OVERALL
nominal_thread_size2.500 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 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-196-2076
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51953-218B · 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
•
MEDIA FOR WHICH DESIGNED: FLUID SINGLE RESPONSE
•
NOMINAL THREAD SIZE: 2.500 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTM A733 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51953 GOVERNMENT STANDARD
•
SURFACE TREATMENT: OXIDE OR ZINC OVERALL
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
NOMINAL THREAD SIZE2.500 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81346-ASTM A733 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51953 GOVERNMENT STANDARD
SURFACE TREATMENTOXIDE OR ZINC OVERALL
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIALSTEEL OVERALL
SURFACE TREATMENTOXIDE OR ZINC OVERALL
MATERIALSTEEL OVERALL
LEG LENGTH1.000 INCHES MAXIMUM ALL ENDS IN
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
77D608232Interchangeable
interchangeable cross-reference
interchangeable
80080-1Interchangeable
interchangeable cross-reference
interchangeable
77D608232P3Interchangeable
interchangeable cross-reference
interchangeable
302714Interchangeable
interchangeable cross-reference
interchangeable
B17-128Interchangeable
Same NIIN cross-reference
interchangeable
WW-N-351Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51953-218B?
MS51953-218B is a NIPPLE,PIPE.
What parts can replace MS51953-218B?
There are 7 known substitutes for MS51953-218B: 77D608232, 80080-1, 77D608232P3 and 4 more. Substitute compatibility should be verified for your specific system.
Is MS51953-218B still available?
MS51953-218B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026