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Technical Data Sheet
PartsTable / COMPONENT / 8B6999
8B6999 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, end_style: VERTEX BELOW CENTER, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 5.750 INCHES NOMINAL IN, major_thickness: 0.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-200-3548, 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
8B6999
NSN: 5325-00-200-3548
FSC: 5325
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL
end_styleVERTEX BELOW CENTER
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter5.750 INCHES NOMINAL IN
major_thickness0.125 INCHES NOMINAL IN
outside_diameter6.125 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUNDED CORNERS
NSN5325-00-200-3548
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8B6999 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MAJOR THICKNESS: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
END STYLE: VERTEX BELOW CENTER
•
INSIDE DIAMETER: 5.750 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 6.125 INCHES NOMINAL IN
•
RING STYLE: STRAIGHT GAP
•
USAGE DESIGN: EXTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
TECHNICAL CHARACTERISTICS (FLIS)
MAJOR THICKNESS0.125 INCHES NOMINAL IN
MATERIALSTEEL
END STYLEVERTEX BELOW CENTER
INSIDE DIAMETER5.750 INCHES NOMINAL IN
OUTSIDE DIAMETER6.125 INCHES NOMINAL IN
RING STYLESTRAIGHT GAP
USAGE DESIGNEXTERNAL
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
123-322Interchangeable
interchangeable cross-reference
interchangeable
123C322Interchangeable
interchangeable cross-reference
interchangeable
20665001-22Interchangeable
interchangeable cross-reference
interchangeable
80EA1C1F1WL2N13WHEELM0DULATEInterchangeable
interchangeable cross-reference
interchangeable
641925Interchangeable
interchangeable cross-reference
interchangeable
32731Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8B6999?
8B6999 is a RING,RETAINING.
What parts can replace 8B6999?
There are 17 known substitutes for 8B6999: 123-322, 123C322, 20665001-22 and 14 more. Substitute compatibility should be verified for your specific system.
Is 8B6999 still available?
8B6999 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026