PartsTable / COMPONENT / 121-B-1/4
121-B-1/4
✓ 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 121-B-1/4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-202-9390, 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
121-B-1/4
NSN: 4730-00-202-9390 FSC: 4730 CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
Part Number 121-B-1/4 NSN 4730-00-202-9390
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL
END A: —
STRAIGHT
END B: —
SPECIFICATIONS
Thread: —
Material: —
Pressure: —
PN: 121-B-1/4 · 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 20
A1653 Interchangeable interchangeable cross-reference
interchangeable
852686 Interchangeable interchangeable cross-reference
interchangeable
5A7043 Interchangeable interchangeable cross-reference
interchangeable
1574730 Interchangeable interchangeable cross-reference
interchangeable
21786 Interchangeable interchangeable cross-reference
interchangeable
PM21786 Interchangeable interchangeable cross-reference
interchangeable
LIFECYCLE
Status CANCELLED
Availability —
RoHS Compliant EAR99 Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121-B-1/4?
121-B-1/4 is a 121-B-1/4.
What parts can replace 121-B-1/4?
There are 20 known substitutes for 121-B-1/4: A1653, 852686, 5A7043 and 17 more. Substitute compatibility should be verified for your specific system.
Is 121-B-1/4 still available?
121-B-1/4 is currently cancelled.
Request a Quote — 121-B-1/4