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326489 — BOLT,U

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

326489: BOLT,U.

The BOLT,U is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, thread_length: 3.000 INCHES MINIMUM AND 3.120 INCHES MAXIMUM IN, hardness_rating: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL, style_designator: ROUND BEND, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-160-3942, 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
326489
NSN: 5306-01-160-3942
FSC: 5306 — Bolts
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
thread_length3.000 INCHES MINIMUM AND 3.120 INCHES MAXIMUM IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND BEND
thread_directionRIGHT-HAND
nominal_thread_diameter0.625 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNRF
inside_distance_between_shanks3.083 INCHES MINIMUM AND 3.088 INCHES MAXIMUM IN
material_document_and_classificationSAE1541 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_inside_center_of_bend_to_bolt_end6.620 INCHES MINIMUM AND 6.740 INCHES MAXIMUM IN
NSN5306-01-160-3942
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 326489 · 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
•
INSIDE DISTANCE BETWEEN SHANKS: 3.083 INCHES MINIMUM AND 3.088 INCHES MAXIMUM IN
•
THREAD LENGTH: 3.000 INCHES MINIMUM AND 3.120 INCHES MAXIMUM IN
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END: 6.620 INCHES MINIMUM AND 6.740 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: ROUND BEND
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE1541 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
INSIDE DISTANCE BETWEEN SHANKS3.083 INCHES MINIMUM AND 3.088 INCHES MAXIMUM IN
THREAD LENGTH3.000 INCHES MINIMUM AND 3.120 INCHES MAXIMUM IN
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END6.620 INCHES MINIMUM AND 6.740 INCHES MAXIMUM IN
STYLE DESIGNATORROUND BEND
MATERIAL DOCUMENT AND CLASSIFICATIONSAE1541 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2A A
THREAD QUANTITY PER INCH18
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 1
5306011603942Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 326489?
326489 is a BOLT,U.
What parts can replace 326489?
There is 1 known substitute for 326489: 5306011603942. Substitute compatibility should be verified for your specific system.
What is the NSN for 326489?
326489 is cataloged in the U.S. Government catalog under NSN 5306-01-160-3942. 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.