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21110X4 — SWITCH,RADIO FREQUENCY TRANSMISS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

21110X4: SWITCH,RADIO FREQUENCY TRANSMISS.

SWITCH,RADIO FREQUENCY TRANSMISS. Key specifications include handle: FURNISHED, length: 5.000 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, markings: 5 INCH STD IN, material: COPPER ALLOY, end_shape: SPHERICAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-011-6452, 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
21110X4
NSN: 4730-00-011-6452
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 20969 — ESSEX BRASS CORPORATION (USA)
SPECIFICATIONS
handleFURNISHED
length5.000 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
markings5 INCH STD IN
materialCOPPER ALLOY
end_shapeSPHERICAL
blade_typeBACKWARD CURVE
flow_angle90.0 DEGREES SECOND END
seat_angle37.0 DEGREES FIRST END
design_typeSINGLE WIDTH
temp_rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_class2B SECOND END
NSN4730-00-011-6452
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21110X4 · 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
SUBSTITUTES & CROSS-REFERENCES 9
4-010110BReference document
Same NSN cross-reference
Reference document — Secondary reference
5061K12Reference document
Same NSN cross-reference
Reference document — Secondary reference
D9576-33A40Reference document
Same NSN cross-reference
Reference document — Secondary reference
59098-000Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
41FS-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
09B9251BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21110X4?
21110X4 is a SWITCH,RADIO FREQUENCY TRANSMISS.
What parts can replace 21110X4?
There are 9 known substitutes for 21110X4: 4-010110B, 5061K12, D9576-33A40 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21110X4?
21110X4 is cataloged in the U.S. Government catalog under NSN 4730-00-011-6452. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.