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ST3M494-9-25 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M494-9-25: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: DISHED HEXAGON, head_height: 0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.732 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-259-3525, 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
ST3M494-9-25
NSN: 5306-01-259-3525
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
head_styleDISHED HEXAGON
head_height0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
thread_class3A A
thread_length0.732 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.387 INCHES MINIMUM AND 2.417 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.6235 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
NSN5306-01-259-3525
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M494-9-25 · 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: 0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.387 INCHES MINIMUM AND 2.417 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.6235 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.732 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
FASTENER LENGTH2.387 INCHES MINIMUM AND 2.417 INCHES MAXIMUM IN
SHOULDER LENGTH1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.6235 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.732 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.562 INCHES IN
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
VS3251-9-25Reference document
Same NSN cross-reference
Reference document — Secondary reference
PBF1263-9-25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S11-1065-9-25Same 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 ST3M494-9-25?
ST3M494-9-25 is a BOLT,SHOULDER.
What parts can replace ST3M494-9-25?
There are 3 known substitutes for ST3M494-9-25: VS3251-9-25, PBF1263-9-25, S11-1065-9-25. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M494-9-25?
ST3M494-9-25 is cataloged in the U.S. Government catalog under NSN 5306-01-259-3525. 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.