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Technical Data Sheet
PartsTable / COMPONENT / ST48D59
ST48D59 ✓ 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, thread_class: 2A ALL ENDS A, connection_type: EXTERNAL QUICK DISCONNECT ALL ENDS, furnished_items: NUT AND SLEEVE, connection_style: SWIVEL NUT WITH COMRESSION SLEEVE 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 4730-01-254-6168, 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
ST48D59
NSN: 4730-01-254-6168
FSC: 4730
CAGE: 04236 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
thread_class2A ALL ENDS A
connection_typeEXTERNAL QUICK DISCONNECT ALL ENDS
furnished_itemsNUT AND SLEEVE
connection_styleSWIVEL NUT WITH COMRESSION SLEEVE ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.375 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorUNF ALL ENDS
nominal_outside_diameter_tube_accommodated0.188 INCHES ALL ENDS IN
NSN4730-01-254-6168
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST48D59 · 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: SWIVEL NUT WITH COMRESSION SLEEVE ALL ENDS
•
THREAD CLASS: 2A ALL ENDS A
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.188 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
•
FURNISHED ITEMS: NUT AND SLEEVE
•
MATERIAL: COPPER ALLOY BODY
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLESWIVEL NUT WITH COMRESSION SLEEVE ALL ENDS
THREAD CLASS2A ALL ENDS A
STYLE DESIGNATORMALE COUPLING HALF
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.188 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNF ALL ENDS
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
FURNISHED ITEMSNUT AND SLEEVE
MATERIALCOPPER ALLOY BODY
CONNECTION TYPETHREADED INTERNAL TUBE FIRST FLUID END CONNECTION
QUICK DISCONNECT METHODPUSH-PULL ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
C1152Interchangeable
interchangeable cross-reference
interchangeable
5573659Interchangeable
interchangeable cross-reference
interchangeable
F802AInterchangeable
interchangeable cross-reference
interchangeable
AT11Interchangeable
interchangeable cross-reference
interchangeable
84SH114Interchangeable
interchangeable cross-reference
interchangeable
RELEASE3225Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST48D59?
ST48D59 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace ST48D59?
There are 8 known substitutes for ST48D59: C1152, 5573659, F802A and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST48D59?
ST48D59 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-254-6168. 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