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2645435 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2645435: BOLT,SQUARE NECK.

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: BUTTONBUTTON, neck_width: 0.616 INCHES MINIMUM AND 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM0.642 INCHES MAXIMUM IN, head_height: 0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN, neck_length: 0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN, thread_class: 2A2A. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-073-3642, 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
2645435
NSN: 5306-01-073-3642
FSC: 5306 — Bolts
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleBUTTONBUTTON
neck_width0.616 INCHES MINIMUM AND 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM0.642 INCHES MAXIMUM IN
head_height0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
neck_length0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
thread_class2A2A
head_diameter1.219 INCHES MINIMUM AND 1.219 INCHES MINIMUM AND 1.344 INCHES MAXIMUM1.344 INCHES MAXIMUM IN
thread_length1.414 INCHES MINIMUM AND 1.414 INCHES MINIMUM AND 1.747 INCHES MAXIMUM1.747 INCHES MAXIMUM IN
fastener_length1.940 INCHES MINIMUM AND 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM2.060 INCHES MAXIMUM IN
thread_directionRIGHT-HANDRIGHT-HAND
nominal_thread_diameter0.625 INCHES0.625 INCHES IN
thread_quantity_per_inch1111
NSN5306-01-073-3642
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2645435 · 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
•
NECK LENGTH: 0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.940 INCHES MINIMUM AND 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM2.060 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.414 INCHES MINIMUM AND 1.414 INCHES MINIMUM AND 1.747 INCHES MAXIMUM1.747 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.625 INCHES0.625 INCHES IN
•
HEAD STYLE: BUTTONBUTTON
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
NECK WIDTH: 0.616 INCHES MINIMUM AND 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM0.642 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
NECK LENGTH0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
HEAD HEIGHT0.313 INCHES MINIMUM AND 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM0.344 INCHES MAXIMUM IN
FASTENER LENGTH1.940 INCHES MINIMUM AND 1.940 INCHES MINIMUM AND 2.060 INCHES MAXIMUM2.060 INCHES MAXIMUM IN
THREAD LENGTH1.414 INCHES MINIMUM AND 1.414 INCHES MINIMUM AND 1.747 INCHES MAXIMUM1.747 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.625 INCHES0.625 INCHES IN
HEAD STYLEBUTTONBUTTON
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
NECK WIDTH0.616 INCHES MINIMUM AND 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM0.642 INCHES MAXIMUM IN
THREAD CLASS2A2A
THREAD QUANTITY PER INCH1111
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 3
32WLFS1213-1-1/2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
35252741Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
32WLFS1213X1.5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 2645435?
2645435 is a BOLT,SQUARE NECK.
What parts can replace 2645435?
There are 3 known substitutes for 2645435: 32WLFS1213-1-1/2, 35252741, 32WLFS1213X1.5. Substitute compatibility should be verified for your specific system.
What is the NSN for 2645435?
2645435 is cataloged in the U.S. Government catalog under NSN 5306-01-073-3642. 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.