PartsTable
Technical Data Sheet
MS51953-40 ✓ 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, special_features: WEAPON SYSTEM ESSENTIAL, style_designator: LONG, surface_treatment: ZINC OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-1541, 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
MS51953-40
NSN: 4730-00-196-1541
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
special_featuresWEAPON SYSTEM ESSENTIAL
style_designatorLONG
surface_treatmentZINC OVERALL
nominal_thread_size0.250 INCHES ALL ENDS IN
nominal_overall_length6.000 INCHES IN
end_item_identificationF/A-18 HORNET AIRCRAFT
thread_series_designatorNPT ALL ENDS
criticality_code_justificationFEAT
material_document_and_classificationASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-196-1541
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51953-40 · 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 THREAD SIZE: 0.250 INCHES ALL ENDS IN
MATERIAL: STEEL OVERALL
NOMINAL OVERALL LENGTH: 6.000 INCHES IN
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
CRITICALITY CODE JUSTIFICATION: FEAT
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
MATERIALSTEEL OVERALL
NOMINAL OVERALL LENGTH6.000 INCHES IN
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
CRITICALITY CODE JUSTIFICATIONFEAT
SURFACE TREATMENTZINC OVERALL
NOMINAL OVERALL LENGTH6.000 INCHES IN
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
THREAD SERIES DESIGNATORNPT ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
4015T51P03Interchangeable
interchangeable cross-reference
interchangeable
25007Interchangeable
interchangeable cross-reference
interchangeable
DLN25007Interchangeable
interchangeable cross-reference
interchangeable
2910PL0885077Interchangeable
interchangeable cross-reference
interchangeable
272895R91Interchangeable
interchangeable cross-reference
interchangeable
9070-1-002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51953-40?
MS51953-40 is a NIPPLE,PIPE.
What parts can replace MS51953-40?
There are 18 known substitutes for MS51953-40: 4015T51P03, 25007, DLN25007 and 15 more. Substitute compatibility should be verified for your specific system.
Is MS51953-40 still available?
MS51953-40 is currently cancelled.
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