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AS3251-08 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AS3251-08: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON, head_height: 0.213 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN, thread_class: 3A A, fastener_length: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-595-3595, 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
AS3251-08
NSN: 5306-01-595-3595
FSC: 5306 — Bolts
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON
head_height0.213 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN
thread_class3A A
fastener_length0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_between_flats0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ)
NSN5306-01-595-3595
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AS3251-08 · 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: 0.213 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 28
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.213 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN
FASTENER LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH28
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ)
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS3251-08?
AS3251-08 is a BOLT,MACHINE.
What is the NSN for AS3251-08?
AS3251-08 is cataloged in the U.S. Government catalog under NSN 5306-01-595-3595. 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.