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H313859 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

H313859: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.09375 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.3125 INCHES NOMINAL IN, screw_material: STEEL, fastener_length: 0.3125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-578-8768, 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
NSN: 5305-01-578-8768
NIINs: 015788768, 016865479
FSC: 5305 — Screws
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.09375 INCHES NOMINAL IN
thread_class2A A
thread_length0.3125 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length0.3125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.250 INCHES NOMINAL IN
internal_drive_styleW/O INTERNAL DRIVE
end_item_identification015306459
nominal_thread_diameter0.138 INCHES IN
thread_quantity_per_inch32
NSN5305-01-578-8768
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H313859 · 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: 0.110 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.313 INCHES NOMINAL IN
•
THREAD LENGTH: 0.313 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.250 INCHES NOMINAL IN
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.110 INCHES NOMINAL IN
FASTENER LENGTH0.313 INCHES NOMINAL IN
THREAD LENGTH0.313 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL IN
SCREW MATERIALSTEEL
INTERNAL DRIVE STYLEW/O INTERNAL DRIVE
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW, MACHINE-HEX HEAD
SUBSTITUTES & CROSS-REFERENCES 1
92314A191Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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?
H313859 is a SCREW,MACHINE.
What parts can replace H313859?
There is 1 known substitute for H313859: 92314A191. Substitute compatibility should be verified for your specific system.
What is the NSN for H313859?
H313859 is cataloged in the U.S. Government catalog under NSN 5305-01-578-8768. 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.