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MS51521B20S — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS51521B20S: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flow_angle: 90.0 DEGREES, leg_length: 2.0600 INCHES NOMINAL SECOND END IN, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 2B FIRST END, connection_type: THREADED INTERNAL TUBE FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-058-2322, 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
MS51521B20S
NSN: 4730-01-058-2322
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flow_angle90.0 DEGREES
leg_length2.0600 INCHES NOMINAL SECOND END IN
seat_angle37.0 DEGREES ALL ENDS
thread_class2B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
surface_treatmentPASSIVATE OVERALL
nominal_thread_size1.625 INCHES ALL ENDS IN
maximum_operating_temp400.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUN ALL ENDS
NSN4730-01-058-2322
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51521B20S · 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
•
FURNISHED ITEMS AND QUANTITY: 1 TUBE COUPLING NUT W/SLEEVE
•
FLOW ANGLE: 90.0 DEGREES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE2,CLASS D3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: FLARED (TUBE) SECOND END
•
CONNECTION TYPE: THREADED EXTERNAL TUBE SECOND END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.250 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 TUBE COUPLING NUT W/SLEEVE
FLOW ANGLE90.0 DEGREES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE2,CLASS D3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND END
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.250 INCHES ALL ENDS IN
LEG LENGTH2.310 INCHES NOMINAL FIRST END IN
LEG LENGTH2.0600 INCHES NOMINAL SECOND END IN
SUBSTITUTES & CROSS-REFERENCES 7
218-5235Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS51521B205Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
J514Reference document
Same NSN cross-reference
Reference document — Secondary reference
20C6X-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
3903-20-20Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-18866Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51521B20S?
MS51521B20S is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51521B20S?
There are 7 known substitutes for MS51521B20S: 218-5235, MS51521B205, J514 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51521B20S?
MS51521B20S is cataloged in the U.S. Government catalog under NSN 4730-01-058-2322. This indicates validated use in U.S. government and defense supply chains.
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