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4189740 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4189740: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 2.0 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.0 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-672-1390, 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
4189740
NSN: 5305-01-672-1390
FSC: 5305 — Screws
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height2.0 INCHES NOMINAL IN
thread_class2A A
thread_length1.0 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
width_between_flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
end_item_identificationMRAP - M-ATV
nominal_thread_diameter0.38 INCHES IN
thread_series_designatorUNF
NSN5305-01-672-1390
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4189740 · 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: 2.0 INCHES NOMINAL IN
•
THREAD LENGTH: 1.0 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.38 INCHES IN
•
HEAD STYLE: HEXAGON
•
WIDTH BETWEEN FLATS: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT2.0 INCHES NOMINAL IN
THREAD LENGTH1.0 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.38 INCHES IN
HEAD STYLEHEXAGON
WIDTH BETWEEN FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
THREAD CLASS2A A
END ITEM IDENTIFICATIONMRAP - M-ATV
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4189740?
4189740 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 4189740?
4189740 is cataloged in the U.S. Government catalog under NSN 5305-01-672-1390. 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.