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H313859-4 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

H313859-4: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.095 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.4375 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 0.4375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-686-5976, 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
H313859-4
NSN: 5305-01-686-5976
FSC: 5305 — Screws
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.095 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
thread_class2A A
thread_length0.4375 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.4375 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
internal_drive_styleW/O INTERNAL DRIVE
end_item_identification5895-01-530-6459
nominal_thread_diameter0.1640 INCHES IN
screw_surface_treatmentPASSIVATE
NSN5305-01-686-5976
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H313859-4 · 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: 0.095 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.4375 INCHES NOMINAL IN
•
THREAD LENGTH: 0.4375 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.1640 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.095 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.4375 INCHES NOMINAL IN
THREAD LENGTH0.4375 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.1640 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
SCREW MATERIALSTEEL CORROSION RESISTING
INTERNAL DRIVE STYLEW/O INTERNAL DRIVE
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H313859-4?
H313859-4 is a SCREW,MACHINE.
What is the NSN for H313859-4?
H313859-4 is cataloged in the U.S. Government catalog under NSN 5305-01-686-5976. 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.