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Technical Data Sheet
PartsTable / COMPONENT / UM-50-B
UM-50-B ✓ 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: 0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, overall_length: 2.688 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN, connection_type: THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION, 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 4730-01-013-1580, 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
UM-50-B
NSN: 4730-01-013-1580
FSC: 4730
CAGE: 24869 — DVCC, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
overall_length2.688 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN
connection_typeTHREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.500 INCHES ALL ENDS IN
quick_disconnect_methodTWO LUG UNIVERSAL ALL ENDS
thread_series_designatorNPT ALL ENDS
NSN4730-01-013-1580
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: UM-50-B · 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: TWO LUG UNIVERSAL ALL ENDS
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
MATERIAL: COPPER ALLOY BODY
•
CONNECTION STYLE: PLAIN ALL ENDS
•
LEG LENGTH: 0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
QUICK DISCONNECT METHODTWO LUG UNIVERSAL ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
MATERIALCOPPER ALLOY BODY
CONNECTION STYLEPLAIN ALL ENDS
LEG LENGTH0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
OVERALL LENGTH2.688 INCHES MINIMUM AND 2.730 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1535Interchangeable
interchangeable cross-reference
interchangeable
AB2Interchangeable
interchangeable cross-reference
interchangeable
PAB-2Interchangeable
interchangeable cross-reference
interchangeable
ANTI-BORAX NUMBER 2Interchangeable
interchangeable cross-reference
interchangeable
1025-30203 PIECE 36Interchangeable
Same NIIN cross-reference
interchangeable
AKB-1/2MPTInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UM-50-B?
UM-50-B is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace UM-50-B?
There are 6 known substitutes for UM-50-B: 1535, AB2, PAB-2 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for UM-50-B?
UM-50-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-013-1580. 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