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7603719 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

7603719: BOLT,SQUARE NECK.

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT CHAMFER, neck_width: 0.494 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN, head_height: 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN, neck_length: 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, thread_class: 2A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-760-3719, 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
7603719
NSN: 5306-00-760-3719
FSC: 5306 — Bolts
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
neck_width0.494 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
head_height0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
neck_length0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
thread_length0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
fastener_length0.766 INCHES MINIMUM AND 0.797 INCHES MAXIMUM IN
special_featuresHEAD END DRILLED AND TAPPED 1/4-20 UNC-2B BY 0.375 IN. DEEP IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
NSN5306-00-760-3719
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 7603719 · 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: 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.766 INCHES MINIMUM AND 0.797 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
NECK LENGTH0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
HEAD HEIGHT0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
FASTENER LENGTH0.766 INCHES MINIMUM AND 0.797 INCHES MAXIMUM IN
THREAD LENGTH0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
NECK WIDTH0.494 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
SPECIAL FEATURESHEAD END DRILLED AND TAPPED 1/4-20 UNC-2B BY 0.375 IN. DEEP IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7603719?
7603719 is a BOLT,SQUARE NECK.
What is the NSN for 7603719?
7603719 is cataloged in the U.S. Government catalog under NSN 5306-00-760-3719. 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.