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Technical Data Sheet
PartsTable / COMPONENT / MIL-P-10388
MIL-P-10388 ✓ 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

ADAPTER,STRAIGHT,FLANGE TO PIPE. Key specifications include material: ALUMINUM ALLOY 356.0 OVERALL, connection_type: UNTHREADED EXTERNAL PIPE ALL ENDS, connection_style: GROOVED (PIPE) ALL ENDS, special_features: BOTH ENDS GROOVED MALE, surface_treatment: ANODIZE OVERALL, operating_pressure: 230.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-052-8031, 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-P-10388
NSN: 4730-00-052-8031
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 356.0 OVERALL
connection_typeUNTHREADED EXTERNAL PIPE ALL ENDS
connection_styleGROOVED (PIPE) ALL ENDS
special_featuresBOTH ENDS GROOVED MALE
surface_treatmentANODIZE OVERALL
operating_pressure230.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_overall_length6.000 INCHES IN
media_for_which_designedWATER-OIL-GAS SINGLE RESPONSE
nominal_pipe_size_accommodated6.000 INCHES ALL ENDS IN
material_document_and_classificationQQ-A-601,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-052-8031
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-P-10388 · 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
•
STYLE DESIGNATOR: GROOVED AND THREADED INTERNAL
•
SURFACE TREATMENT: ENAMEL LUSTERLESS OVERALL
•
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNED: SCHEDULE STD SECOND END
•
MATERIAL: ALUMINUM ALLOY 6151 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-367,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
OPERATING PRESSURE: 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL OVERALL LENGTH: 3.250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORGROOVED AND THREADED INTERNAL
SURFACE TREATMENTENAMEL LUSTERLESS OVERALL
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE STD SECOND END
MATERIALALUMINUM ALLOY 6151 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-367,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
OPERATING PRESSURE600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL OVERALL LENGTH3.250 INCHES IN
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SINGLE RESPONSE
NOMINAL THREAD SIZE4.000 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
M10388-A09AI1C3BInterchangeable
Same NIIN cross-reference
interchangeable
A-A-52592Interchangeable
Same NIIN cross-reference
interchangeable
AA52592-A09AI1C3BInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-P-10388?
MIL-P-10388 is a ADAPTER,STRAIGHT,FLANGE TO PIPE.
What parts can replace MIL-P-10388?
There are 3 known substitutes for MIL-P-10388: M10388-A09AI1C3B, A-A-52592, AA52592-A09AI1C3B. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-P-10388?
MIL-P-10388 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-052-8031. 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