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Technical Data Sheet
PartsTable / COMPONENT / MS51520B8
MS51520B8 ✓ 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 OVERALL, head_type: SOLID, nut_style: TUBE FITTING LOCKNUT, seat_type: BEVELED, flow_angle: 90.0 DEGREES, leg_length: 0.59 INCHES NOMINAL FIRST END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-125-7922, 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
MS51520B8
NSN: 4730-00-125-7922
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
head_typeSOLID
nut_styleTUBE FITTING LOCKNUT
seat_typeBEVELED
flow_angle90.0 DEGREES
leg_length0.59 INCHES NOMINAL FIRST END IN
nut_height0.310 INCHES NOMINAL IN
seat_angle37.0 DEGREES FIRST END
sweep_typeLONG
head_height0.38 INCHES MINIMUM IN
temp_rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_size3/4-12
NSN4730-00-125-7922
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51520B8 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
A5105Interchangeable
interchangeable cross-reference
interchangeable
7377123Interchangeable
interchangeable cross-reference
interchangeable
135DS1Interchangeable
interchangeable cross-reference
interchangeable
GPW6770Interchangeable
interchangeable cross-reference
interchangeable
A2465Interchangeable
interchangeable cross-reference
interchangeable
2465Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51520B8?
MS51520B8 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51520B8?
There are 18 known substitutes for MS51520B8: A5105, 7377123, 135DS1 and 15 more. Substitute compatibility should be verified for your specific system.
Is MS51520B8 still available?
MS51520B8 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