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1131787-8 — MICROCIRCUIT,DIGITAL

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

1131787-8: MICROCIRCUIT,DIGITAL.

The MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include end_type: DOUBLE SETSCREW FIRST END, material: STEEL, seal_type: LABYRINTH, base_style: MEDIUM TWO PIN, block_type: FIXED, body_width: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-375-2877, 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
1131787-8
NSN: 3120-00-375-2877
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 23667 — SMITHS DETECTION INC. DBA SMITHS DETECTION INC CASC (USA)
SPECIFICATIONS
end_typeDOUBLE SETSCREW FIRST END
materialSTEEL
seal_typeLABYRINTH
base_styleMEDIUM TWO PIN
block_typeFIXED
body_width0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
bore_shapeSTRAIGHT
bulb_styleT ("U" SHAPED TUBULAR)
base_length3.1250 INCHES NOMINAL IN
body_height0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
body_length0.755 INCHES MINIMUM AND 0.785 INCHES MAXIMUM IN
bore_diameter2.1875 INCHES NOMINAL IN
NSN3120-00-375-2877
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 1131787-8 · 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 4
20401Reference document
Same NSN cross-reference
Reference document — Secondary reference
20405Reference document
Same NSN cross-reference
Reference document — Secondary reference
287151Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
22021561Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1131787-8?
1131787-8 is a MICROCIRCUIT,DIGITAL.
What parts can replace 1131787-8?
There are 4 known substitutes for 1131787-8: 20401, 20405, 287151 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1131787-8?
1131787-8 is cataloged in the U.S. Government catalog under NSN 3120-00-375-2877. 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.