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670921 — INSULATOR,WASHER

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

670921: INSULATOR,WASHER.

The INSULATOR,WASHER is a the manufacturer industrial component. Key specifications include shape: CYLINDRICAL, material: GUTTA-PERCHA PLASTIC, quantity: 120, corner_shape: SQUARE INSIDE RIGHT CORNER, x-ray_opacity: NOT INCLUDED, overall_height: 0.026 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-153-8425, 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
670921
NSN: 3120-00-153-8425
NIINs: 001538425, 003262931, 012722108
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
shapeCYLINDRICAL
materialGUTTA-PERCHA PLASTIC
quantity120
corner_shapeSQUARE INSIDE RIGHT CORNER
x-ray_opacityNOT INCLUDED
overall_height0.026 INCHES NOMINAL IN
overall_length0.2490 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
inside_diameter0.068 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
outside_diameter0.125 INCHES NOMINAL IN
special_features6 VIALS X 20 POINTS EA; HAND ROLLED; USED W/ANY CODENSATION TECHNIQUE
style_designatorROUND, FLAT
body_inside_diameter0.2565 INCHES MINIMUM AND 0.2575 INCHES MAXIMUM IN
NSN3120-00-153-8425
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 670921 · 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: SQUARE INSIDE RIGHT CORNER
•
STYLE DESIGNATOR: SOLID
•
BODY INSIDE DIAMETER: 0.2565 INCHES MINIMUM AND 0.2575 INCHES MAXIMUM IN
•
SPHERICAL BODY DIAMETER: 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
STYLE DESIGNATORSOLID
OVERALL LENGTH0.2490 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.2565 INCHES MINIMUM AND 0.2575 INCHES MAXIMUM IN
SPHERICAL BODY DIAMETER0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 670921?
670921 is a INSULATOR,WASHER.
What is the NSN for 670921?
670921 is cataloged in the U.S. Government catalog under NSN 3120-00-153-8425. 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.