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PartsTable / COMPONENT / QS300M112S
QS300M112S ✓ 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: STEEL COMP 302 BAND, overall_width: 0.562 INCHES NOMINAL IN, inside_diameter: 6.625 INCHES MINIMUM AND 7.500 INCHES MAXIMUM IN, style_designator: WIRE, surface_treatment: PASSIVATE BAND, fastening_device_type: SLOTTED HEXAGON HEAD SCREW. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-838-9889, 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
QS300M112S
NSN: 4730-00-838-9889
FSC: 4730
CAGE: 08484 — BREEZE-EASTERN LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 BAND
overall_width0.562 INCHES NOMINAL IN
inside_diameter6.625 INCHES MINIMUM AND 7.500 INCHES MAXIMUM IN
style_designatorWIRE
surface_treatmentPASSIVATE BAND
fastening_device_typeSLOTTED HEXAGON HEAD SCREW
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-838-9889
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: QS300M112S · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 410 SCREW
•
STYLE DESIGNATOR: WIRE
•
SURFACE TREATMENT: PASSIVATE BAND
•
FASTENING DEVICE TYPE: SLOTTED HEXAGON HEAD SCREW
•
INSIDE DIAMETER: 6.625 INCHES MINIMUM AND 7.500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 410 SCREW
STYLE DESIGNATORWIRE
SURFACE TREATMENTPASSIVATE BAND
MATERIALSTEEL COMP 302 BAND
FASTENING DEVICE TYPESLOTTED HEXAGON HEAD SCREW
INSIDE DIAMETER6.625 INCHES MINIMUM AND 7.500 INCHES MAXIMUM IN
OVERALL WIDTH0.562 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
6-3-116Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-2692Interchangeable
interchangeable cross-reference
interchangeable
629900-2Interchangeable
interchangeable cross-reference
interchangeable
6505-052Interchangeable
interchangeable cross-reference
interchangeable
300 112 H BInterchangeable
interchangeable cross-reference
interchangeable
300-112HInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QS300M112S?
QS300M112S is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace QS300M112S?
There are 13 known substitutes for QS300M112S: 6-3-116, MIL-F-2692, 629900-2 and 10 more. Substitute compatibility should be verified for your specific system.
Is QS300M112S still available?
QS300M112S 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