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4256818 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4256818: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.090 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.270 INCHES NOMINAL IN, thread_length: 0.380 INCHES NOMINAL IN, screw_material: STEEL. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-661-5099, 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
4256818
NSN: 5305-01-661-5099
FSC: 5305 — Screws
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
head_stylePAN
head_height0.090 INCHES NOMINAL IN
thread_class2A A
head_diameter0.270 INCHES NOMINAL IN
thread_length0.380 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length0.380 INCHES NOMINAL IN
locking_featureLOCKWASHER
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE II
end_item_identification4210-01-622-0440
nominal_thread_diameter0.1380 INCHES IN
NSN5305-01-661-5099
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4256818 · 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
•
EXTENDED WASHER THICKNESS: 0.020 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.090 INCHES NOMINAL IN
•
SCREW SURFACE TREATMENT: ZINC
•
FASTENER LENGTH: 0.380 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.290 INCHES NOMINAL IN
•
THREAD LENGTH: 0.380 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.1380 INCHES IN
•
HEAD STYLE: PAN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.020 INCHES NOMINAL IN
HEAD HEIGHT0.090 INCHES NOMINAL IN
SCREW SURFACE TREATMENTZINC
FASTENER LENGTH0.380 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.290 INCHES NOMINAL IN
THREAD LENGTH0.380 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.1380 INCHES IN
HEAD STYLEPAN
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATURELOCKWASHER
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 4256818?
4256818 is a SCREW,MACHINE.
What is the NSN for 4256818?
4256818 is cataloged in the U.S. Government catalog under NSN 5305-01-661-5099. 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.