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8410634 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8410634: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include shape: CYLINDRICAL, end_item_identification: SHIPPING PACKING CONDITION FUEL TANK ASSEMBLY, SHORT, part_name_assigned_by_controlling_agency: MK 818 MOD 0 CONTAINER, accommodated_equipment_identifying_number: 8410903 DRAWING NO.. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-558-7589, 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
8410634
NSN: 5305-00-558-7589
NIINs: 005587589, 016658249
FSC: 5305 — Screws
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
shapeCYLINDRICAL
end_item_identificationSHIPPING PACKING CONDITION FUEL TANK ASSEMBLY, SHORT
part_name_assigned_by_controlling_agencyMK 818 MOD 0 CONTAINER
accommodated_equipment_identifying_number8410903 DRAWING NO.
NSN5305-00-558-7589
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8410634 · 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
•
WIDTH ACROSS FLATS: 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
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FASTENER LENGTH: 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
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HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
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HOLE CONFIGURATION STYLE: ROUND LONGITUDINAL HOLE
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NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
FASTENER LENGTH0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
THREAD LENGTH0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HOLE CONFIGURATION STYLEROUND LONGITUDINAL HOLE
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPHOSPHATE OVERALL
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 8410634?
8410634 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 8410634?
8410634 is cataloged in the U.S. Government catalog under NSN 5305-00-558-7589. 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.