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188957 — STRIP,ELECTRICAL GROUNDING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

188957: STRIP,ELECTRICAL GROUNDING.

The STRIP,ELECTRICAL GROUNDING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 0.3125 INCHES NOMINAL IN, surface_finish: 63.0 MICROINCHES INTERMEDIATE LAYER, style_designator: SOLID, EXTERNAL FLANGES BOTH ENDS, left_flange_width: 0.0625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-618-6443, 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
188957
NSN: 3120-00-618-6443
NIINs: 006186443, 013214867
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 24658 — GENERAL REGULATOR CORP. DBA ACCUDRIV (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length0.3125 INCHES NOMINAL IN
surface_finish63.0 MICROINCHES INTERMEDIATE LAYER
style_designatorSOLID, EXTERNAL FLANGES BOTH ENDS
left_flange_width0.0625 INCHES NOMINAL IN
right_flange_width0.0625 INCHES NOMINAL IN
body_inside_diameter0.3080 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN
body_outside_diameter0.4960 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
end_item_identificationAIRPORT SURVEILLANCE DETECTION EQUIPMENT 3 (ASDE3)
left_flange_outside_diameter0.5585 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
right_flange_outside_diameter0.5585 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
NSN3120-00-618-6443
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 188957 · 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
•
SURFACE FINISH: 63.0 MICROINCHES INTERMEDIATE LAYER
•
CORNER SHAPE: SQUARE ALL CORNERS
•
RIGHT FLANGE WIDTH: 0.0625 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.4960 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGES BOTH ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 0.3080 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES INTERMEDIATE LAYER
CORNER SHAPESQUARE ALL CORNERS
RIGHT FLANGE WIDTH0.0625 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.4960 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGES BOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.3125 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.3080 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN
RIGHT FLANGE OUTSIDE DIAMETER0.5585 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
LEFT FLANGE OUTSIDE DIAMETER0.5585 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
50691-57Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 188957?
188957 is a STRIP,ELECTRICAL GROUNDING.
What parts can replace 188957?
There is 1 known substitute for 188957: 50691-57. Substitute compatibility should be verified for your specific system.
What is the NSN for 188957?
188957 is cataloged in the U.S. Government catalog under NSN 3120-00-618-6443. 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.