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D-1678 — TRANSFORMER,RADIO FREQUENCY

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

D-1678: TRANSFORMER,RADIO FREQUENCY.

The TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: COPPER, construction: HOLLOW, overall_length: 4.438 INCHES NOMINAL IN, wall_thickness: 0.0625 INCHES NOMINAL IN, cross-sectional_width: 0.344 INCHES NOMINAL IN, cross-sectional_height: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-302-9555, 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
D-1678
NSN: 3120-00-302-9555
NIINs: 003029555, 006357168, 010294160
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 1LW55 — BORGWARNER PDS (ANDERSON), L.L.C. (USA)
SPECIFICATIONS
materialCOPPER
constructionHOLLOW
overall_length4.438 INCHES NOMINAL IN
wall_thickness0.0625 INCHES NOMINAL IN
cross-sectional_width0.344 INCHES NOMINAL IN
cross-sectional_height0.750 INCHES NOMINAL IN
mounting_configurationTWO 0.203 IN. DIA HOLES 1.875 IN. C TO C IN
end_item_identificationTYPE NO. AN/TRC-32
body_cross-sectional_shapeRECTANGULAR
general_characteristics_item_descriptionMATL STEEL QQ-S-766 CL 410 CONDITION A
NSN3120-00-302-9555
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: D-1678 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D-1678?
D-1678 is a TRANSFORMER,RADIO FREQUENCY.
What is the NSN for D-1678?
D-1678 is cataloged in the U.S. Government catalog under NSN 3120-00-302-9555. 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.