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687 — TRANSFORMER,RADIO FREQUENCY

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

687: TRANSFORMER,RADIO FREQUENCY.

The TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include shape: ROUND TAPERED, material: STEEL CORROSION RESISTING OVERALL, thickness: 0.062 INCHES NOMINAL IN, base_style: SUB-MINIATURE TWO PIN, body_style: UNSHIELDED, SOLID POST, TAPERED SEAT, body_width: 0.340 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-0676, 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
687
NSN: 3110-00-100-0676
NIINs: 001000676, 001893041, 003545927, 004737470, 006165961, 006317344, 007198681, 009384023, 010381329, 010440071, 010534101, 010684709, 013102768, 015087538
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
shapeROUND TAPERED
materialSTEEL CORROSION RESISTING OVERALL
thickness0.062 INCHES NOMINAL IN
base_styleSUB-MINIATURE TWO PIN
body_styleUNSHIELDED, SOLID POST, TAPERED SEAT
body_width0.340 INCHES NOMINAL IN
bulb_styleT (TUBULAR)
head_styleFLAT CHAMFER
body_height0.250 INCHES NOMINAL IN
body_length0.460 INCHES NOMINAL IN
head_height0.9 MILLIMETERS NOMINAL MM
groove_width0.062 INCHES NOMINAL IN
NSN3110-00-100-0676
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 687 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 9
FF-B-187/1Reference document
Same NSN cross-reference
Reference document — Secondary reference
49486Reference document
Same NSN cross-reference
Reference document — Secondary reference
292037R91Reference document
Same NSN cross-reference
Reference document — Secondary reference
570Reference document
Same NSN cross-reference
Reference document — Secondary reference
4B8395Reference document
Same NSN cross-reference
Reference document — Secondary reference
731981Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 687?
687 is a TRANSFORMER,RADIO FREQUENCY.
What parts can replace 687?
There are 9 known substitutes for 687: FF-B-187/1, 49486, 292037R91 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 687?
687 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0676. 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.