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Technical Data Sheet
PartsTable / COMPONENT / SMB540888
SMB540888 ✓ 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 SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: HEADLESS (SETSCREW), point_style: HALF DOG, thread_class: 2A A, thread_length: 0.313 INCHES MAXIMUM IN, fastener_length: 0.313 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-814-3358, 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
SMB540888
NSN: 5305-00-814-3358
FSC: 5305
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleHEADLESS (SETSCREW)
point_styleHALF DOG
thread_class2A A
thread_length0.313 INCHES MAXIMUM IN
fastener_length0.313 INCHES NOMINAL IN
special_featuresNYLON POINT
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.250 INCHES IN
NSN5305-00-814-3358
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SMB540888 · 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 CLASS: 2A A
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD LENGTH: 0.313 INCHES MAXIMUM IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
POINT STYLE: HALF DOG
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.313 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
POINT STYLEHALF DOG
SPECIAL FEATURESNYLON POINT
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
HEAD STYLEHEADLESS (SETSCREW)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
CS14Interchangeable
interchangeable cross-reference
interchangeable
222953Interchangeable
interchangeable cross-reference
interchangeable
S1614XInterchangeable
interchangeable cross-reference
interchangeable
759Interchangeable
interchangeable cross-reference
interchangeable
10108492Interchangeable
interchangeable cross-reference
interchangeable
ST7M223D6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB540888?
SMB540888 is a SETSCREW.
What parts can replace SMB540888?
There are 11 known substitutes for SMB540888: CS14, 222953, S1614X and 8 more. Substitute compatibility should be verified for your specific system.
Is SMB540888 still available?
SMB540888 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