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F261 ✓ 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

MODIFICATION KIT,SONAR EQUIPMENT. Key specifications include material: STEEL OVERALL, tube_type: NUCLEAR RADIATION DETECTOR, overall_length: 1.219 INCHES NOMINAL IN, drive_end_shape: SQUARE SINGLE END INTERNAL, special_features: ENVELOPE MATERIAL: METAL, style_designator: INTERNAL-INTERNAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-012-0141, 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
F261
NSN: 4730-00-012-0141
FSC: 4730
CAGE: 71995 — DRESSER INDUSTRIES INC WAUKESHA ENGINE DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
tube_typeNUCLEAR RADIATION DETECTOR
overall_length1.219 INCHES NOMINAL IN
drive_end_shapeSQUARE SINGLE END INTERNAL
special_featuresENVELOPE MATERIAL: METAL
style_designatorINTERNAL-INTERNAL
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_size0.813 INCHES NOMINAL SINGLE END IN
end_item_identificationARSS
wrenching_surface_shape12 POINT SINGLE END INTERNAL
NSN4730-00-012-0141
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: F261 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
SAE-J512Interchangeable
interchangeable cross-reference
interchangeable
101-11012Interchangeable
interchangeable cross-reference
interchangeable
12 010110BInterchangeable
interchangeable cross-reference
interchangeable
EMM308Interchangeable
interchangeable cross-reference
interchangeable
E26Interchangeable
interchangeable cross-reference
interchangeable
F26-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F261?
F261 is a MODIFICATION KIT,SONAR EQUIPMENT.
What parts can replace F261?
There are 30 known substitutes for F261: SAE-J512, 101-11012, 12 010110B and 27 more. Substitute compatibility should be verified for your specific system.
Is F261 still available?
F261 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