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8566066 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8566066: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.469 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 2.000 INCHES NOMINAL IN, fastener_length: 2.469 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-644-6555, 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
8566066
NSN: 5306-01-644-6555
FSC: 5306 — Bolts
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.469 INCHES NOMINAL IN
thread_class3A A
thread_length2.000 INCHES NOMINAL IN
fastener_length2.469 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats1.125 INCHES NOMINAL IN
end_item_identificationMK88 MOD 2 GUN MOUNT ASSY
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch16
thread_series_designatorUNF
NSN5306-01-644-6555
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8566066 · 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
•
HEAD HEIGHT: 0.469 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.469 INCHES NOMINAL IN
•
THREAD LENGTH: 2.000 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 1.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.469 INCHES NOMINAL IN
FASTENER LENGTH2.469 INCHES NOMINAL IN
THREAD LENGTH2.000 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS1.125 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT
THREAD CLASS3A A
END ITEM IDENTIFICATIONMK88 MOD 2 GUN MOUNT ASSY
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8566066?
8566066 is a BOLT,MACHINE.
What is the NSN for 8566066?
8566066 is cataloged in the U.S. Government catalog under NSN 5306-01-644-6555. 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.