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1783339 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1783339: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 2.9 MILLIMETERS NOMINAL MM, head_diameter: 8.1 MILLIMETERS NOMINAL MM, thread_length: 0.500 INCHES NOMINAL IN, screw_material: STEEL, fastener_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-579-8764, 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
1783339
NSN: 5305-01-579-8764
FSC: 5305 — Screws
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
head_stylePAN
head_height2.9 MILLIMETERS NOMINAL MM
head_diameter8.1 MILLIMETERS NOMINAL MM
thread_length0.500 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
end_item_identification3805-01-560-2384 GRADER,ROAD,MOTORIZED
nominal_thread_diameter0.164 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-579-8764
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1783339 · 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: 2.9 MILLIMETERS NOMINAL MM
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: PAN
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
TECHNICAL CHARACTERISTICS
HEAD HEIGHT2.9 MILLIMETERS NOMINAL MM
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD LENGTH0.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEPAN
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
END ITEM IDENTIFICATION3805-01-560-2384 GRADER,ROAD,MOTORIZED
THREAD QUANTITY PER INCH32
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
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 1783339?
1783339 is a SCREW,MACHINE.
What is the NSN for 1783339?
1783339 is cataloged in the U.S. Government catalog under NSN 5305-01-579-8764. 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.