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J304 ✓ 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

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: CHARCOAL, overall_width: 0.205 INCHES NOMINAL IN, overall_height: 5.906 INCHES NOMINAL IN, overall_length: 0.210 INCHES NOMINAL IN, inside_diameter: 1.250 INCHES NOMINAL IN, mounting_method: TERMINAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-014-1078, 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
J304
NSN: 4730-01-014-1078
FSC: 4730
CAGE: 70847 — BAND-IT-IDEX INC UNIT OF IDEX CORP (USA)
SPECIFICATIONS
materialCHARCOAL
overall_width0.205 INCHES NOMINAL IN
overall_height5.906 INCHES NOMINAL IN
overall_length0.210 INCHES NOMINAL IN
inside_diameter1.250 INCHES NOMINAL IN
mounting_methodTERMINAL
terminal_length0.500 INCHES NOMINAL IN
overall_diameter2.953 INCHES NOMINAL IN
style_designatorADJUSTABLE BAND
fastening_device_typeBUCKLE
internal_configurationFIELD EFFECT
semiconductor_materialSILICON
NSN4730-01-014-1078
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: J304 · 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
•
INSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 201 OVERALL
•
STYLE DESIGNATOR: ADJUSTABLE BAND
•
FASTENING DEVICE TYPE: BUCKLE
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.620 INCHES NOMINAL IN
INSIDE DIAMETER1.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 201 OVERALL
STYLE DESIGNATORADJUSTABLE BAND
FASTENING DEVICE TYPEBUCKLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
E54Interchangeable
interchangeable cross-reference
interchangeable
F5Interchangeable
interchangeable cross-reference
interchangeable
A52491-13Interchangeable
interchangeable cross-reference
interchangeable
LEANInterchangeable
interchangeable cross-reference
interchangeable
1005Interchangeable
interchangeable cross-reference
interchangeable
149473-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J304?
J304 is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace J304?
There are 23 known substitutes for J304: E54, F5, A52491-13 and 20 more. Substitute compatibility should be verified for your specific system.
Is J304 still available?
J304 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