PartsTable
Technical Data Sheet
MS51522B20S ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, flow_angle: 45.0 DEGREES, leg_length: 1.594 INCHES NOMINAL SECOND END IN, seat_angle: 37.0 DEGREES SECOND END, thread_class: 2A SECOND END A, connection_type: THREADED EXTERNAL TUBE SECOND END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-034-6720, 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
MS51522B20S
NSN: 4730-01-034-6720
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
flow_angle45.0 DEGREES
leg_length1.594 INCHES NOMINAL SECOND END IN
seat_angle37.0 DEGREES SECOND END
thread_class2A SECOND END A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleFLARED (TUBE) SECOND END
surface_treatmentPASSIVATE OVERALL
nominal_thread_size1.625 INCHES ALL ENDS IN
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUN ALL ENDS
NSN4730-01-034-6720
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51522B20S · 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
LEG LENGTH: 1.594 INCHES NOMINAL SECOND END IN
THREAD CLASS: 2A SECOND END A
NOMINAL THREAD SIZE: 1.625 INCHES ALL ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE: 12.0 DEGREES FIRST END
FURNISHED ITEMS AND QUANTITY: 1 TUBE COUPLING NUT W/SLEEVE
TECHNICAL CHARACTERISTICS (FLIS)
LEG LENGTH1.594 INCHES NOMINAL SECOND END IN
THREAD CLASS2A SECOND END A
LEG LENGTH2.031 INCHES NOMINAL FIRST END IN
NOMINAL THREAD SIZE1.625 INCHES ALL ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE12.0 DEGREES FIRST END
FURNISHED ITEMS AND QUANTITY1 TUBE COUPLING NUT W/SLEEVE
THREAD CLASS2B FIRST END
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID SINGLE RESPONSE
SPECIFICATION/STANDARD DATA96906-MS51522 GOVERNMENT STANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
307-967Interchangeable
interchangeable cross-reference
interchangeable
13205E4783Interchangeable
interchangeable cross-reference
interchangeable
11472Interchangeable
interchangeable cross-reference
interchangeable
20-V6BX-SSInterchangeable
Same NIIN cross-reference
interchangeable
MS51522A20SInterchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-18866Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51522B20S?
MS51522B20S is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51522B20S?
There are 6 known substitutes for MS51522B20S: 307-967, 13205E4783, 11472 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51522B20S?
MS51522B20S is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-034-6720. This indicates validated use in U.S. government and defense supply chains.
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