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Technical Data Sheet
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M1183/10-15A3 — Technical Data Sheet

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— · 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 UNION,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_type: BEVELED, reducer_type: CONCENTRIC, connection_type: UNTHREADED INTERNAL PIPE ALL ENDS, connection_style: SOCKET W/ GROVE (PIPE) ALL ENDS, special_features: GROOVED W/BRAZING RINGS SEPARATELY PACKAGED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-542-5193, 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
M1183/10-15A3
NSN: 4730-00-542-5193
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_typeBEVELED
reducer_typeCONCENTRIC
connection_typeUNTHREADED INTERNAL PIPE ALL ENDS
connection_styleSOCKET W/ GROVE (PIPE) ALL ENDS
special_featuresGROOVED W/BRAZING RINGS SEPARATELY PACKAGED
style_designatorSCREWED
operating_pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
coupling_flange_shapeROUND
maximum_operating_temp150.0 FAHRENHEIT SECOND RESPONSE DEGF
nominal_overall_length2.899 INCHES IN
end_item_identificationBQN HELICOPTER LANDING SYSTEM, LAMPS MK III; LOGISTICS SUPPORT VESSEL
NSN4730-00-542-5193
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M1183/10-15A3 · 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
•
MAXIMUM OPERATING TEMP: 425.0 FAHRENHEIT FIRST RESPONSE DEGF
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.250 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
•
MEDIA FOR WHICH DESIGNED: STEAM FIRST RESPONSE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-B61 ASSN STD 1ST MATERIAL RESPONSE OR QQ-C-390 FED SPEC 2ND MATERIAL RESPONSE OR MIL-B-16541 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONBQN HELICOPTER LANDING SYSTEM, LAMPS MK III; LOGISTICS SUPPORT VESSEL
MAXIMUM OPERATING TEMP425.0 FAHRENHEIT FIRST RESPONSE DEGF
NOMINAL PIPE SIZE ACCOMMODATED1.250 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP150.0 FAHRENHEIT SECOND RESPONSE DEGF
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
MEDIA FOR WHICH DESIGNEDSTEAM FIRST RESPONSE
SPECIAL FEATURESGROOVED W/BRAZING RINGS SEPARATELY PACKAGED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-B61 ASSN STD 1ST MATERIAL RESPONSE OR QQ-C-390 FED SPEC 2ND MATERIAL RESPONSE OR MIL-B-16541 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SECOND RESPONSE
SPECIFICATION/STANDARD DATA81349-MIL-F-1183H GOVERNMENT SPECIFICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
M1183/10-10A3Interchangeable
interchangeable cross-reference
interchangeable
M1183/10-10A2Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-1183/10Interchangeable
interchangeable cross-reference
interchangeable
MILF1183Interchangeable
interchangeable cross-reference
interchangeable
4676061-0F22Interchangeable
interchangeable cross-reference
interchangeable
100FLAGG-FL0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M1183/10-15A3?
M1183/10-15A3 is a UNION,PIPE.
What parts can replace M1183/10-15A3?
There are 17 known substitutes for M1183/10-15A3: M1183/10-10A3, M1183/10-10A2, MIL-F-1183/10 and 14 more. Substitute compatibility should be verified for your specific system.
Is M1183/10-15A3 still available?
M1183/10-15A3 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: September 2026