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68485-9-21 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

68485-9-21: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP H11 OVERALL, head_style: DOUBLE HEXAGON, grip_length: 0.588 INCHES MINIMUM AND 0.608 INCHES MAXIMUM IN, head_height: 0.328 INCHES NOMINAL IN, thread_class: BA, grip_diameter: 0.632 INCHES MINIMUM AND 0.652 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-533-8904, 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
68485-9-21
NSN: 5306-01-533-8904
FSC: 5306 — Bolts
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL COMP H11 OVERALL
head_styleDOUBLE HEXAGON
grip_length0.588 INCHES MINIMUM AND 0.608 INCHES MAXIMUM IN
head_height0.328 INCHES NOMINAL IN
thread_classBA
grip_diameter0.632 INCHES MINIMUM AND 0.652 INCHES MAXIMUM IN
thread_length0.642 INCHES NOMINAL IN
fastener_length2.000 INCHES NOMINAL IN
special_featuresSHEAR STRENGTH
thread_directionRIGHT-HAND
width_between_flats0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
end_item_identificationTRISTAR AIRCRAFT
NSN5306-01-533-8904
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 68485-9-21 · 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
•
HEAD HEIGHT: 0.328 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.000 INCHES NOMINAL IN
•
THREAD LENGTH: 0.642 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.875 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.588 INCHES MINIMUM AND 0.608 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.328 INCHES NOMINAL IN
FASTENER LENGTH2.000 INCHES NOMINAL IN
THREAD LENGTH0.642 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.875 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.588 INCHES MINIMUM AND 0.608 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
GRIP DIAMETER0.632 INCHES MINIMUM AND 0.652 INCHES MAXIMUM IN
SPECIAL FEATURESSHEAR STRENGTH
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 68485-9-21?
68485-9-21 is a BOLT,CLOSE TOLERANCE.
What is the NSN for 68485-9-21?
68485-9-21 is cataloged in the U.S. Government catalog under NSN 5306-01-533-8904. 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.