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Technical Data Sheet
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41FS-12 ✓ 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: COPPER ALLOY 360 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.500 INCHES NOMINAL IN, seat_angle: 45.00 DEGREES NOMINAL, thread_series: UNS, thread_direction: RIGHT-HAND. 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
41FS-12
NSN: 4730-00-012-0141
FSC: 4730
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleTUBE COUPLING
nut_height1.500 INCHES NOMINAL IN
seat_angle45.00 DEGREES NOMINAL
thread_seriesUNS
thread_directionRIGHT-HAND
width_across_flats1.250 INCHES NOMINAL IN
nominal_thread_size1.062 INCHES IN
thread_pitch_diameters+1.0161 TO 1.0230 INCHES IN
smallest_inside_diameter0.755 INCHES NOMINAL IN
thread_quantity_per_inch14
nondefinitive_spec/std_data4 FIGURE
NSN4730-00-012-0141
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 41FS-12 · 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 29
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 41FS-12?
41FS-12 is a MODIFICATION KIT,SONAR EQUIPMENT.
What parts can replace 41FS-12?
There are 29 known substitutes for 41FS-12: SAE-J512, 101-11012, 12 010110B and 26 more. Substitute compatibility should be verified for your specific system.
Is 41FS-12 still available?
41FS-12 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