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421-5663 — BOLT,EYE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

421-5663: BOLT,EYE.

The BOLT,EYE is a the manufacturer industrial component. Key specifications include overall_length: 3.465 INCHES NOMINAL IN, end_item_identification: 1905-011541191, nominal_thread_diameter: 16.0 MILLIMETERS MM, part_name_assigned_by_controlling_agency: M16 LIFTING EYEBOLT. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-735-4690, 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
421-5663
NSN: 5306-01-735-4690
FSC: 5306 — Bolts
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
overall_length3.465 INCHES NOMINAL IN
end_item_identification1905-011541191
nominal_thread_diameter16.0 MILLIMETERS MM
thread_series_designatorM
part_name_assigned_by_controlling_agencyM16 LIFTING EYEBOLT
NSN5306-01-735-4690
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 421-5663 · 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
•
NOMINAL THREAD DIAMETER: 16.0 MILLIMETERS MM
•
THREAD SERIES DESIGNATOR: M
TECHNICAL CHARACTERISTICS
OVERALL LENGTH3.465 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER16.0 MILLIMETERS MM
PART NAME ASSIGNED BY CONTROLLING AGENCYM16 LIFTING EYEBOLT
END ITEM IDENTIFICATION1905-011541191
THREAD SERIES DESIGNATORM
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 421-5663?
421-5663 is a BOLT,EYE.
What is the NSN for 421-5663?
421-5663 is cataloged in the U.S. Government catalog under NSN 5306-01-735-4690. 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.