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Technical Data Sheet
PartsTable / COMPONENT / MS27020-17
MS27020-17 ✓ 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 COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, leg_length: 1.500 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN, overall_length: 3.062 INCHES MINIMUM AND 3.312 INCHES MAXIMUM IN, connection_type: EXTERNAL QUICK DISCONNECT ALL ENDS, connection_style: PLAIN ALL ENDS, special_features: W/LOCKWIRE HOLE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-840-0796, 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
MS27020-17
NSN: 4730-00-840-0796
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length1.500 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN
overall_length3.062 INCHES MINIMUM AND 3.312 INCHES MAXIMUM IN
connection_typeEXTERNAL QUICK DISCONNECT ALL ENDS
connection_stylePLAIN ALL ENDS
special_featuresW/LOCKWIRE HOLE
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
nominal_thread_size4.000 INCHES ALL ENDS IN
quick_disconnect_methodCAM-LOCKING ALL ENDS
thread_series_designatorNPT ALL ENDS
quick_disconnect_nominal_size4.250 INCHES ALL ENDS IN
NSN4730-00-840-0796
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS27020-17 · 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
•
QUICK DISCONNECT METHOD: CAM-LOCKING ALL ENDS
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION
•
MATERIAL: ALUMINUM ALLOY BODY
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
•
NOMINAL THREAD SIZE: 4.000 INCHES ALL ENDS IN
•
SURFACE TREATMENT: ANODIZE BODY
•
STYLE DESIGNATOR: MALE COUPLING HALF
TECHNICAL CHARACTERISTICS (FLIS)
QUICK DISCONNECT METHODCAM-LOCKING ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
MATERIALALUMINUM ALLOY BODY
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
NOMINAL THREAD SIZE4.000 INCHES ALL ENDS IN
SURFACE TREATMENTANODIZE BODY
STYLE DESIGNATORMALE COUPLING HALF
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
QUICK DISCONNECT NOMINAL SIZE4.250 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
A-A-59326/1Interchangeable
interchangeable cross-reference
interchangeable
MS27020-11Interchangeable
interchangeable cross-reference
interchangeable
300705Interchangeable
interchangeable cross-reference
interchangeable
633-A 3INInterchangeable
interchangeable cross-reference
interchangeable
AA59326/1A-8-AInterchangeable
interchangeable cross-reference
interchangeable
MS27020-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS27020-17?
MS27020-17 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace MS27020-17?
There are 30 known substitutes for MS27020-17: A-A-59326/1, MS27020-11, 300705 and 27 more. Substitute compatibility should be verified for your specific system.
Is MS27020-17 still available?
MS27020-17 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