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Technical Data Sheet
PartsTable / COMPONENT / 50-D-BR
50-D-BR ✓ 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: 0.641 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, overall_length: 2.000 INCHES MINIMUM AND 2.203 INCHES MAXIMUM IN, connection_type: INTERNAL QUICK DISCONNECT ALL ENDS, connection_style: PLAIN 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 4730-01-135-2988, 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
50-D-BR
NSN: 4730-01-135-2988
FSC: 4730
CAGE: 24869 — DVCC, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.641 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
overall_length2.000 INCHES MINIMUM AND 2.203 INCHES MAXIMUM IN
connection_typeINTERNAL QUICK DISCONNECT ALL ENDS
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.500 INCHES ALL ENDS IN
quick_disconnect_methodCAM-LOCKING ALL ENDS
thread_series_designatorNPT ALL ENDS
nondefinitive_spec/std_data5 TYPE AND 2 CLASS
specification/standard_data96906-MS27024 GOVERNMENT STANDARD AND 81349-MIL-C-27487 GOVERNMENT SPECIFICATION
quick_disconnect_nominal_size1.250 INCHES ALL ENDS IN
NSN4730-01-135-2988
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 50-D-BR · 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: INTERNAL QUICK DISCONNECT ALL ENDS
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
QUICK DISCONNECT NOMINAL SIZE: 1.250 INCHES ALL ENDS IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION STYLE: PLAIN ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
STYLE DESIGNATORMALE COUPLING HALF
QUICK DISCONNECT NOMINAL SIZE1.250 INCHES ALL ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE BODY
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
CONNECTION STYLEPLAIN ALL ENDS
LEG LENGTH0.641 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
633D-4BRInterchangeable
interchangeable cross-reference
interchangeable
633-D-4IN-BRInterchangeable
interchangeable cross-reference
interchangeable
AA59326/5-2-B-1Interchangeable
interchangeable cross-reference
interchangeable
633DInterchangeable
interchangeable cross-reference
interchangeable
633D-.75BRInterchangeable
interchangeable cross-reference
interchangeable
633-D 3/4IN(SS)Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50-D-BR?
50-D-BR is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 50-D-BR?
There are 13 known substitutes for 50-D-BR: 633D-4BR, 633-D-4IN-BR, AA59326/5-2-B-1 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 50-D-BR?
50-D-BR is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-135-2988. 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