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Technical Data Sheet
PartsTable / COMPONENT / ET-20
ET-20 ✓ 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 TELEGRAPH REPEATER SUBASSEMBLY is a the manufacturer industrial component. Key specifications include shape: STRAIGHT STYLE, length: 20.000 INCHES NOMINAL IN, material: PLASTIC POLYVINYL CHLORIDE (PVC) ADAPTER, sterility: STERILE, design_type: ONE-WAY, pinch_clamp: NOT INCLUDED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-329-1921, 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
ET-20
NSN: 4730-00-329-1921
FSC: 4730
CAGE: 35871 — ACD TRIDON INC (CAN)
SPECIFICATIONS
shapeSTRAIGHT STYLE
length20.000 INCHES NOMINAL IN
materialPLASTIC POLYVINYL CHLORIDE (PVC) ADAPTER
sterilitySTERILE
design_typeONE-WAY
pinch_clampNOT INCLUDED
adapter_typeTUBING CONNECTION
connector_typeMALE LUER SLIP
special_featuresCAPACITY APPROX. 2.5 CC.; NONPYROGENIC; NONTOXIC; 100 INDIVIDUAL PACKAGE PER BOX
tubing_inside_diameter0.110 INCHES NOMINAL IN
disposition_after_initial_useDISPOSABLE
NSN4730-00-329-1921
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ET-20 · 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 28
LT2-65Interchangeable
interchangeable cross-reference
interchangeable
PA43716AInterchangeable
interchangeable cross-reference
interchangeable
56994Interchangeable
interchangeable cross-reference
interchangeable
6189-132-603REDInterchangeable
interchangeable cross-reference
interchangeable
249-7868-3331-504Interchangeable
interchangeable cross-reference
interchangeable
41-201Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ET-20?
ET-20 is a TELEGRAPH REPEATER SUBASSEMBLY.
What parts can replace ET-20?
There are 28 known substitutes for ET-20: LT2-65, PA43716A, 56994 and 25 more. Substitute compatibility should be verified for your specific system.
Is ET-20 still available?
ET-20 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