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Technical Data Sheet
PartsTable / COMPONENT / MS27021-3
MS27021-3 ✓ 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: 2.000 INCHES NOMINAL IN, overall_length: 2.000 INCHES NOMINAL IN, connection_type: UNTHREADED EXTERNAL HOSE FIRST FLUID END CONNECTION, connection_style: BARBED OR SERRATED END ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-231-2789, 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
MS27021-3
NSN: 4730-01-231-2789
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length2.000 INCHES NOMINAL IN
overall_length2.000 INCHES NOMINAL IN
connection_typeUNTHREADED EXTERNAL HOSE FIRST FLUID END CONNECTION
connection_styleBARBED OR SERRATED END ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
quick_disconnect_methodCAM-LOCKING ALL ENDS
specification/standard_data58535-A-A-59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
quick_disconnect_nominal_size1.719 INCHES ALL ENDS IN
material_document_and_classificationQQ-A-601 FED SPEC ALL MATERIAL RESPONSES BODY
nominal_inside_diameter_hose_accommodated0.750 INCHES ALL ENDS IN
NSN4730-01-231-2789
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS27021-3 · 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
•
CONNECTION STYLE: BARBED OR SERRATED END ALL ENDS
•
QUICK DISCONNECT METHOD: CAM-LOCKING ALL ENDS
•
LEG LENGTH: 2.000 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 58535-A-A-59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
CONNECTION TYPE: EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-601 FED SPEC ALL MATERIAL RESPONSES BODY
•
STYLE DESIGNATOR: MALE COUPLING HALF
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEBARBED OR SERRATED END ALL ENDS
QUICK DISCONNECT METHODCAM-LOCKING ALL ENDS
LEG LENGTH2.000 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA58535-A-A-59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CONNECTION TYPEEXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-601 FED SPEC ALL MATERIAL RESPONSES BODY
STYLE DESIGNATORMALE COUPLING HALF
CONNECTION TYPEUNTHREADED EXTERNAL HOSE FIRST FLUID END CONNECTION
SURFACE TREATMENTANODIZE BODY
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.750 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
MS27021-9Interchangeable
interchangeable cross-reference
interchangeable
15A107P1Interchangeable
interchangeable cross-reference
interchangeable
6-1-746-8-3AInterchangeable
interchangeable cross-reference
interchangeable
A-A-59326/2Interchangeable
interchangeable cross-reference
interchangeable
AA59326/2-4-BInterchangeable
interchangeable cross-reference
interchangeable
125-C-BRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS27021-3?
MS27021-3 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace MS27021-3?
There are 26 known substitutes for MS27021-3: MS27021-9, 15A107P1, 6-1-746-8-3A and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS27021-3?
MS27021-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-231-2789. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026