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12340259-12 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12340259-12: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON EXTENDED WASHER, head_height: 0.306 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.840 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-449-0510, 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
12340259-12
NSN: 5306-01-449-0510
FSC: 5306 — Bolts
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON EXTENDED WASHER
head_height0.306 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
thread_class2A A
thread_length0.840 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
shoulder_length0.210 INCHES MINIMUM AND 0.220 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentZINC OVERALL
width_between_flats0.698 INCHES MINIMUM AND 0.722 INCHES MAXIMUM IN
NSN5306-01-449-0510
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12340259-12 · 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: 0.070 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.306 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.210 INCHES MINIMUM AND 0.220 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 FE/ZN 5 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.840 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.070 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
HEAD HEIGHT0.306 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
FASTENER LENGTH1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
SHOULDER LENGTH0.210 INCHES MINIMUM AND 0.220 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 FE/ZN 5 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
SHOULDER DIAMETER0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.840 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429 GRADE 8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
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
5306PL1943534Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 12340259-12?
12340259-12 is a BOLT,SHOULDER.
What parts can replace 12340259-12?
There is 1 known substitute for 12340259-12: 5306PL1943534. Substitute compatibility should be verified for your specific system.
What is the NSN for 12340259-12?
12340259-12 is cataloged in the U.S. Government catalog under NSN 5306-01-449-0510. 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.