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Technical Data Sheet
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FM6506 ✓ 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: COPPER ALLOY BODY, leg_length: 0.750 INCHES NOMINAL IN, overall_length: 2.938 INCHES NOMINAL IN, connection_type: INTERNAL QUICK DISCONNECT ALL ENDS, furnished_items: GASKET, connection_style: PLAIN ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-702-4742, 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
FM6506
NSN: 4730-00-702-4742
FSC: 4730
CAGE: 14127 — FOSTER MANUFACTURING CO, INC. DBA FOSTER MANUFACTURING CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.750 INCHES NOMINAL IN
overall_length2.938 INCHES NOMINAL IN
connection_typeINTERNAL QUICK DISCONNECT ALL ENDS
furnished_itemsGASKET
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSAFETY LOCKING FEATURE AND SELF-SEALING
nominal_thread_size0.750 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-LOCK ALL ENDS
thread_series_designatorNPT ALL ENDS
quick_disconnect_nominal_size0.859 INCHES ALL ENDS IN
NSN4730-00-702-4742
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: FM6506 · 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 TYPE: THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
•
QUICK DISCONNECT NOMINAL SIZE: 0.859 INCHES ALL ENDS IN
•
CONNECTION STYLE: PLAIN ALL ENDS
•
LEG LENGTH: 0.750 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
FEATURES PROVIDED: SAFETY LOCKING FEATURE AND SELF-SEALING
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
QUICK DISCONNECT NOMINAL SIZE0.859 INCHES ALL ENDS IN
CONNECTION STYLEPLAIN ALL ENDS
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
LEG LENGTH0.750 INCHES NOMINAL IN
THREAD SERIES DESIGNATORNPT ALL ENDS
FEATURES PROVIDEDSAFETY LOCKING FEATURE AND SELF-SEALING
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
FURNISHED ITEMSGASKET
OVERALL LENGTH2.938 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
00725665450426Interchangeable
interchangeable cross-reference
interchangeable
51-10312Interchangeable
interchangeable cross-reference
interchangeable
204C22Interchangeable
interchangeable cross-reference
interchangeable
B38Interchangeable
interchangeable cross-reference
interchangeable
MS39256B38Interchangeable
interchangeable cross-reference
interchangeable
R24-1B1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FM6506?
FM6506 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace FM6506?
There are 23 known substitutes for FM6506: 00725665450426, 51-10312, 204C22 and 20 more. Substitute compatibility should be verified for your specific system.
Is FM6506 still available?
FM6506 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