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S343-8-16 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

S343-8-16: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: SPLINE EXTENDED WASHER, grip_length: 1.000 INCHES NOMINAL IN, head_height: 0.450 INCHES NOMINAL IN, grip_diameter: 0.499 INCHES NOMINAL IN, thread_length: 0.767 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-477-5821, 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
S343-8-16
NSN: 5306-01-477-5821
FSC: 5306 — Bolts
CAGE: 17446 — HUCK INTERNATIONAL, INC (USA)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleSPLINE EXTENDED WASHER
grip_length1.000 INCHES NOMINAL IN
head_height0.450 INCHES NOMINAL IN
grip_diameter0.499 INCHES NOMINAL IN
thread_length0.767 INCHES NOMINAL IN
fastener_length1.767 INCHES NOMINAL IN
thread_directionRIGHT-HAND
head_minor_diameter0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
end_item_identificationFIGHTER AIRCRAFT-FIRST (F18 E/F)
nominal_thread_diameter0.500 INCHES IN
extended_washer_diameter0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
NSN5306-01-477-5821
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S343-8-16 · 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
•
EXTENDED WASHER THICKNESS: 0.072 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.450 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.767 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.767 INCHES NOMINAL IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.072 INCHES NOMINAL IN
HEAD HEIGHT0.450 INCHES NOMINAL IN
FASTENER LENGTH1.767 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
THREAD LENGTH0.767 INCHES NOMINAL IN
SHANK UNTHREADED HOLE DIAMETER0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN
CRITICALITY CODE JUSTIFICATIONAGAV
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLESPLINE EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 2
ST3M753-8-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
11829-8-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S343-8-16?
S343-8-16 is a BOLT,CLOSE TOLERANCE.
What parts can replace S343-8-16?
There are 2 known substitutes for S343-8-16: ST3M753-8-16, 11829-8-16. Substitute compatibility should be verified for your specific system.
What is the NSN for S343-8-16?
S343-8-16 is cataloged in the U.S. Government catalog under NSN 5306-01-477-5821. 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.