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257231-3 — ATTENUATOR,FIXED

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

257231-3: ATTENUATOR,FIXED.

The ATTENUATOR,FIXED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, corner_shape: SQUARE OUTSIDE RIGHT CORNER, flange_width: 0.1600 INCHES NOMINAL IN, overall_length: 4.2200 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-936-2703, 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
257231-3
NSN: 3120-00-936-2703
NIINs: 009362703, 015730077
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 6K4C8 — GOODRICH CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
corner_shapeSQUARE OUTSIDE RIGHT CORNER
flange_width0.1600 INCHES NOMINAL IN
overall_length4.2200 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentCADMIUM OVERALL
body_inside_diameter2.2150 INCHES MINIMUM AND 2.2190 INCHES MAXIMUM IN
body_outside_diameter2.5215 INCHES MINIMUM AND 2.5230 INCHES MAXIMUM IN
flange_outside_diameter3.2200 INCHES MINIMUM AND 3.2800 INCHES MAXIMUM IN
antirotation/lubrication_type_and_quantity2 HOLE
NSN3120-00-936-2703
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 257231-3 · 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
KEY FEATURES
•
CORNER SHAPE: CHAMFERED INSIDE LEFT CORNER
•
FLANGE OUTSIDE DIAMETER: 3.2200 INCHES MINIMUM AND 3.2800 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 2.5215 INCHES MINIMUM AND 2.5230 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPECHAMFERED OUTSIDE LEFT CORNER
FLANGE OUTSIDE DIAMETER3.2200 INCHES MINIMUM AND 3.2800 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.5215 INCHES MINIMUM AND 2.5230 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
OVERALL LENGTH4.2200 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 257231-3?
257231-3 is a ATTENUATOR,FIXED.
What is the NSN for 257231-3?
257231-3 is cataloged in the U.S. Government catalog under NSN 3120-00-936-2703. 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.