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Technical Data Sheet
PartsTable / COMPONENT / MS51953-36B
MS51953-36B ✓ 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, surface_treatment: OXIDE OVERALL, nominal_thread_size: 0.250 INCHES ALL ENDS IN, nominal_overall_length: 4.000 INCHES IN, thread_series_designator: NPT ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-9997, 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
MS51953-36B
NSN: 4730-00-277-9997
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
surface_treatmentOXIDE OVERALL
nominal_thread_size0.250 INCHES ALL ENDS IN
nominal_overall_length4.000 INCHES IN
thread_series_designatorNPT ALL ENDS
specification/standard_data81346-ASTM PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-277-9997
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51953-36B · 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
•
SPECIFICATION/STANDARD DATA: 81346-ASTM PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: OXIDE OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
MATERIAL: STEEL OVERALL
•
NOMINAL OVERALL LENGTH: 4.000 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA81346-ASTM PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTOXIDE OVERALL
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIALSTEEL OVERALL
NOMINAL OVERALL LENGTH4.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
PA5330Interchangeable
interchangeable cross-reference
interchangeable
8281Interchangeable
interchangeable cross-reference
interchangeable
BAC1504-1511Interchangeable
interchangeable cross-reference
interchangeable
13-664Interchangeable
interchangeable cross-reference
interchangeable
MS35980-4Interchangeable
interchangeable cross-reference
interchangeable
37019Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51953-36B?
MS51953-36B is a NIPPLE,PIPE.
What parts can replace MS51953-36B?
There are 18 known substitutes for MS51953-36B: PA5330, 8281, BAC1504-1511 and 15 more. Substitute compatibility should be verified for your specific system.
Is MS51953-36B still available?
MS51953-36B 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