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PartsTable / COMPONENT / 21720N PIECE 39
21720N PIECE 39 ✓ 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 FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-197-7736, 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
21720N PIECE 39
NSN: 4730-01-197-7736
FSC: 4730
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialSTEEL
NSN4730-01-197-7736
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21720N PIECE 39 · 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
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
32674Interchangeable
interchangeable cross-reference
interchangeable
19549N PIECE 29Interchangeable
interchangeable cross-reference
interchangeable
32195Interchangeable
interchangeable cross-reference
interchangeable
9527A1318-0Interchangeable
interchangeable cross-reference
interchangeable
12914NInterchangeable
interchangeable cross-reference
interchangeable
HNS-5 19549NInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21720N PIECE 39?
21720N PIECE 39 is a FLANGE,PIPE.
What parts can replace 21720N PIECE 39?
There are 23 known substitutes for 21720N PIECE 39: 32674, 19549N PIECE 29, 32195 and 20 more. Substitute compatibility should be verified for your specific system.
Is 21720N PIECE 39 still available?
21720N PIECE 39 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