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3AX1683 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3AX1683: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include hole_type: DRILLED, head_style: HEXAGON, thread_class: 2A A, hole_diameter: 0.140 INCHES NOMINAL IN, thread_length: 0.562 INCHES NOMINAL IN, nominal_thread_diameter: 0.219 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-552-4307, 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
3AX1683
NSN: 5306-01-552-4307
FSC: 5306 — Bolts
CAGE: 89619 — MACK TRUCKS, INC. DBA MACUNGIE OPERATIONS DIV LEHIGH VALLEY OPERATIONS (USA)
SPECIFICATIONS
hole_typeDRILLED
head_styleHEXAGON
thread_class2A A
hole_diameter0.140 INCHES NOMINAL IN
hole_quantity1
thread_length0.562 INCHES NOMINAL IN
nominal_thread_diameter0.219 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNF
part_name_assigned_by_controlling_agencyCAP SCREW-SPECIAL WITH COTTER PINHOLE IN HEAD
NSN5306-01-552-4307
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3AX1683 · 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
•
THREAD LENGTH: 0.562 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.219 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 18
•
HOLE QUANTITY: 1
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.562 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.219 INCHES IN
HEAD STYLEHEXAGON
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP SCREW-SPECIAL WITH COTTER PINHOLE IN HEAD
THREAD CLASS2A A
THREAD QUANTITY PER INCH18
HOLE QUANTITY1
THREAD SERIES DESIGNATORUNF
HOLE TYPEDRILLED
HOLE DIAMETER0.140 INCHES NOMINAL IN
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3AX1683?
3AX1683 is a BOLT,MACHINE.
What is the NSN for 3AX1683?
3AX1683 is cataloged in the U.S. Government catalog under NSN 5306-01-552-4307. 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.