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MIL-C-4109 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MIL-C-4109: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include operating_pressure: 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, maximum_operating_temp: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF, supplementary_features: PUSH-TYPE 1/4 INCH NPT COUPLING QUICJ CONNECT IN, end_item_identification: 3990-01-444-6174 DISTRIBUTOR, BITUM. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-005-7353, 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
MIL-C-4109
NSN: 4730-00-005-7353
NIINs: 000057353, 001026444, 001035389, 001764293, 002030177, 002030178, 002034846, 002034847, 002039459, 002039460, 002039461, 002039462, 002040738, 002040751, 002515911, 002775678, 002775679, 002898192, 002898194, 002937043, 002937165, 002937167, 002937171, 002937172, 002937180, 002937182, 002937184, 002937845, 003201886, 003201887, 003301368, 003694692, 004184434, 004211407, 004425738, 004896303, 004926058, 004943271, 004943272, 004943273, 005163826, 005293767, 005402277, 005410556, 005807457, 007201868, 007654147, 007854489, 008113323, 008135893, 009059794, 010099067, 010382350, 010505773, 010668732, 010941902, 010945170, 011172818, 011348846, 011858127, 011868122, 012044514, 012064836, 012161088, 012163962, 012243068, 012333434, 012556194, 012592269, 012630903, 012686047, 012831911, 013073663, 014238761, 014397401, 014689090, 015416092
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
operating_pressure1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
supplementary_featuresPUSH-TYPE 1/4 INCH NPT COUPLING QUICJ CONNECT IN
end_item_identification3990-01-444-6174 DISTRIBUTOR, BITUM
NSN4730-00-005-7353
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-C-4109 · 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: HOSE GRIPPING NIPPLE ALL ENDS
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.3985 INCHES ALL ENDS IN
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
QUICK DISCONNECT NOMINAL SIZE: 0.422 INCHES ALL ENDS IN
•
LEG LENGTH: 0.906 INCHES NOMINAL IN
•
FEATURES PROVIDED: SELF-SEALING
•
SPECIFICATION/STANDARD DATA: 58536-A-A-59439 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
TECHNICAL CHARACTERISTICS
CONNECTION STYLEHOSE GRIPPING NIPPLE ALL ENDS
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.3985 INCHES ALL ENDS IN
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.625 INCHES MINIMUM AND 2.906 INCHES MAXIMUM IN
QUICK DISCONNECT NOMINAL SIZE0.422 INCHES ALL ENDS IN
LEG LENGTH0.906 INCHES NOMINAL IN
FEATURES PROVIDEDSELF-SEALING
SPECIFICATION/STANDARD DATA58536-A-A-59439 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
NONDEFINITIVE SPEC/STD DATAA CLASS AND 4 STYLE AND 1 TYPE
FIRST END OUTSIDE DIAMETER HOSE ACCOMMODATED0.625 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 5
AA59439-04-12-20-BReference document
Same NSN cross-reference
Reference document — Secondary reference
3SD7Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AA59439-004-12-20-BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
M4109-04-12-20-BReference document
Same NSN cross-reference
Reference document — Secondary reference
A-A-59439Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MIL-C-4109?
MIL-C-4109 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace MIL-C-4109?
There are 5 known substitutes for MIL-C-4109: AA59439-04-12-20-B, 3SD7, AA59439-004-12-20-B and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-C-4109?
MIL-C-4109 is cataloged in the U.S. Government catalog under NSN 4730-00-005-7353. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.