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Technical Data Sheet
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999-10 — ENVELOPE,TRANSPARENT

✓ Government record, cited
Sandberg · BALL BEARING
PRODUCT OVERVIEW

999-10: ENVELOPE,TRANSPARENT.

The ENVELOPE,TRANSPARENT is a Sandberg industrial component. Key specifications include end_item_identification: GENERAL SPT, part_name_assigned_by_controlling_agency: SURFACE INSPECTION KIT. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-618-2545, 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
999-10
NSN: 3120-00-618-2545
NIINs: 006182545, 008893494, 013117709, 014496455, 016155497
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 00994 — COLUMBUS JACK CORPORATION DIV COLUMBUS JACK (USA)
SPECIFICATIONS
end_item_identificationGENERAL SPT
part_name_assigned_by_controlling_agencySURFACE INSPECTION KIT
NSN3120-00-618-2545
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 999-10 · Sandberg ⚠ 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 ALL CORNERS
•
BODY OUTSIDE DIAMETER: 4.9880 INCHES MINIMUM AND 4.9900 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 4.5050 INCHES MINIMUM AND 4.5070 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER4.9880 INCHES MINIMUM AND 4.9900 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.4950 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
BODY INSIDE DIAMETER4.5050 INCHES MINIMUM AND 4.5070 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
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 999-10?
999-10 is a ENVELOPE,TRANSPARENT manufactured by Sandberg.
What is the NSN for 999-10?
999-10 is cataloged in the U.S. Government catalog under NSN 3120-00-618-2545. 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.