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Technical Data Sheet
PartsTable / COMPONENT / 261X10
261X10 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: COPPER ALLOY OVERALL, nut_style: TUBE COUPLING, nut_height: 0.625 INCHES NOMINAL IN, seat_angle: 45.00 DEGREES NOMINAL, thread_class: 2B, thread_series: UNS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-5493, 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
261X10
NSN: 4730-00-278-5493
FSC: 4730
CAGE: 20969 — ESSEX BRASS CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleTUBE COUPLING
nut_height0.625 INCHES NOMINAL IN
seat_angle45.00 DEGREES NOMINAL
thread_class2B
thread_seriesUNS
thread_directionRIGHT-HAND
length_to_shoulder0.406 INCHES NOMINAL IN
width_across_flats0.938 INCHES NOMINAL IN
nominal_thread_size0.812 INCHES IN
smallest_inside_diameter0.638 INCHES NOMINAL IN
thread_quantity_per_inch18
NSN4730-00-278-5493
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 261X10 · 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
•
SMALLEST INSIDE DIAMETER: 0.638 INCHES NOMINAL IN
•
NUT STYLE: TUBE COUPLING
•
LENGTH TO SHOULDER: 0.406 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 18
•
MATERIAL: COPPER ALLOY OVERALL
•
NUT HEIGHT: 0.625 INCHES NOMINAL IN
•
SEAT ANGLE: 45.00 DEGREES NOMINAL
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.625 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SMALLEST INSIDE DIAMETER0.638 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
LENGTH TO SHOULDER0.406 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18
MATERIALCOPPER ALLOY OVERALL
NUT HEIGHT0.625 INCHES NOMINAL IN
SEAT ANGLE45.00 DEGREES NOMINAL
NOMINAL TUBE OUTSIDE DIAMETER0.625 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIESUNS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
J1508 TYPE B SIZE 79Interchangeable
interchangeable cross-reference
interchangeable
400 7057823 PCInterchangeable
interchangeable cross-reference
interchangeable
SAE-J1508Interchangeable
interchangeable cross-reference
interchangeable
61F10Interchangeable
interchangeable cross-reference
interchangeable
19163Interchangeable
interchangeable cross-reference
interchangeable
17592 PC 12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 261X10?
261X10 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 261X10?
There are 15 known substitutes for 261X10: J1508 TYPE B SIZE 79, 400 7057823 PC, SAE-J1508 and 12 more. Substitute compatibility should be verified for your specific system.
Is 261X10 still available?
261X10 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