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6406821-107 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6406821-107: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL UNS K03104 OVERALL, head_style: FLAT CHAMFER, head_height: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 1.107 INCHES MINIMUM AND 1.740 INCHES MAXIMUM IN, thread_length: 2.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-450-6484, 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
6406821-107
NSN: 5305-01-450-6484
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL UNS K03104 OVERALL
head_styleFLAT CHAMFER
head_height0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
thread_class3A A
head_diameter1.107 INCHES MINIMUM AND 1.740 INCHES MAXIMUM IN
thread_length2.000 INCHES NOMINAL IN
fastener_length3.500 INCHES NOMINAL IN
locking_featurePATCH OR PELLET OR STRIP LOCKING FEATURE
thread_directionRIGHT-HAND
width_across_flats0.625 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.750 INCHES IN
NSN5305-01-450-6484
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6406821-107 · 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: 0.625 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.500 INCHES NOMINAL IN
•
THREAD LENGTH: 2.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
HEAD HEIGHT0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
FASTENER LENGTH3.500 INCHES NOMINAL IN
THREAD LENGTH2.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPATCH OR PELLET OR STRIP LOCKING FEATURE
INTERNAL DRIVE STYLEHEXAGON
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 3
211049045Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
752-6406846-107Reference document
Same NSN cross-reference
Reference document — Secondary reference
752-6406821-107Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 6406821-107?
6406821-107 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 6406821-107?
There are 3 known substitutes for 6406821-107: 211049045, 752-6406846-107, 752-6406821-107. Substitute compatibility should be verified for your specific system.
What is the NSN for 6406821-107?
6406821-107 is cataloged in the U.S. Government catalog under NSN 5305-01-450-6484. 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.