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10108553 ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, surface_treatment: ANODIZE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-118-5809, 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
10108553
NSN: 4730-01-118-5809
FSC: 4730
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
surface_treatmentANODIZE OVERALL
nominal_thread_size0.438 INCHES ALL ENDS IN
nominal_overall_length1.110 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
reduced_passage_nominal_inside_diameter0.094 INCHES ALL ENDS IN
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-01-118-5809
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 10108553 · 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: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.110 INCHES IN
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
REDUCED PASSAGE NOMINAL INSIDE DIAMETER: 0.094 INCHES ALL ENDS IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
THREAD CLASS: 3A ALL ENDS A
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
NOMINAL OVERALL LENGTH1.110 INCHES IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
REDUCED PASSAGE NOMINAL INSIDE DIAMETER0.094 INCHES ALL ENDS IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
THREAD CLASS3A ALL ENDS A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
SURFACE TREATMENTANODIZE OVERALL
SEAT ANGLE37.0 DEGREES FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
10EJRA30Interchangeable
interchangeable cross-reference
interchangeable
26664Interchangeable
interchangeable cross-reference
interchangeable
4786323Interchangeable
interchangeable cross-reference
interchangeable
40720Interchangeable
interchangeable cross-reference
interchangeable
9900-05-BKInterchangeable
interchangeable cross-reference
interchangeable
CATALOG CUT NO. 14205 ITEM 19Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10108553?
10108553 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 10108553?
There are 9 known substitutes for 10108553: 10EJRA30, 26664, 4786323 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 10108553?
10108553 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-118-5809. 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