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Technical Data Sheet
PartsTable / COMPONENT / 218400S8-8
218400S8-8 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT CHAMFER, head_height: 0.164 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.265 INCHES NOMINAL IN, thread_length: 0.500 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-286-0003, 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
218400S8-8
NSN: 5305-00-286-0003
FSC: 5305
CAGE: 88818 — KEARFOTT CORPORATION DIV GUIDANCE AND NAVIGATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT CHAMFER
head_height0.164 INCHES NOMINAL IN
thread_class3A A
head_diameter0.265 INCHES NOMINAL IN
thread_length0.500 INCHES MAXIMUM IN
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.164 INCHES IN
NSN5305-00-286-0003
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 218400S8-8 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
HEAD HEIGHT: 0.164 INCHES NOMINAL IN
•
INTERNAL DRIVE STYLE: HEXAGON
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD LENGTH: 0.500 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 32
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD HEIGHT0.164 INCHES NOMINAL IN
INTERNAL DRIVE STYLEHEXAGON
SURFACE TREATMENTPASSIVATE OVERALL
THREAD LENGTH0.500 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH32
THREAD CLASS3A A
HEAD DIAMETER0.265 INCHES NOMINAL IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MS16995-26Interchangeable
interchangeable cross-reference
interchangeable
714-014/006Interchangeable
interchangeable cross-reference
interchangeable
0444-276Interchangeable
Same NIIN cross-reference
interchangeable
MS35461-2Interchangeable
Same NIIN cross-reference
interchangeable
4176110-4Interchangeable
Same NIIN cross-reference
interchangeable
4-00480-058Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 218400S8-8?
218400S8-8 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 218400S8-8?
There are 6 known substitutes for 218400S8-8: MS16995-26, 714-014/006, 0444-276 and 3 more. Substitute compatibility should be verified for your specific system.
Is 218400S8-8 still available?
218400S8-8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026