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Technical Data Sheet
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K3-S ✓ 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 shape: ROUND, thread_length: 0.531 INCHES NOMINAL IN, overall_length: 0.609 INCHES NOMINAL IN, end_item_identification: BRU-31/A RACK,F-16 ACFT, thread_quantity_per_inch: 20, thread_series_designator: UNS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-620-9306, 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
K3-S
NSN: 4730-00-620-9306
FSC: 4730
CAGE: 14127 — FOSTER MANUFACTURING CO, INC. DBA FOSTER MANUFACTURING CO (USA)
SPECIFICATIONS
shapeROUND
thread_length0.531 INCHES NOMINAL IN
overall_length0.609 INCHES NOMINAL IN
end_item_identificationBRU-31/A RACK,F-16 ACFT
thread_quantity_per_inch20
thread_series_designatorUNS
NSN4730-00-620-9306
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: K3-S · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
DH363NGKInterchangeable
interchangeable cross-reference
interchangeable
H363Interchangeable
interchangeable cross-reference
interchangeable
WS865CInterchangeable
interchangeable cross-reference
interchangeable
SSM-54NInterchangeable
interchangeable cross-reference
interchangeable
K3-SInterchangeable
interchangeable cross-reference
interchangeable
776946-01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K3-S?
K3-S is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace K3-S?
There are 16 known substitutes for K3-S: DH363NGK, H363, WS865C and 13 more. Substitute compatibility should be verified for your specific system.
Is K3-S still available?
K3-S 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