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Technical Data Sheet
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403758-1 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

403758-1: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.533 INCHES MINIMUM AND 0.553 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER, fastener_length: 1.783 INCHES MINIMUM AND 1.803 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-680-5869, 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
403758-1
NSN: 5306-00-680-5869
FSC: 5306 — Bolts
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037 OVERALL
head_styleHEXAGON
head_height0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
thread_class3A A
thread_length0.533 INCHES MINIMUM AND 0.553 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length1.783 INCHES MINIMUM AND 1.803 INCHES MAXIMUM IN
shoulder_length1.250 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.873 INCHES MINIMUM AND 0.874 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats1.239 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN
NSN5306-00-680-5869
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 403758-1 · 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: 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.783 INCHES MINIMUM AND 1.803 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.250 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.873 INCHES MINIMUM AND 0.874 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.533 INCHES MINIMUM AND 0.553 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
SHANK UNTHREADED HOLE DIAMETER: 0.143 INCHES MINIMUM AND 0.147 INCHES MAXIMUM FIRST HOLE IN
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
FASTENER LENGTH1.783 INCHES MINIMUM AND 1.803 INCHES MAXIMUM IN
SHOULDER LENGTH1.250 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER DIAMETER0.873 INCHES MINIMUM AND 0.874 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.533 INCHES MINIMUM AND 0.553 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
SHANK UNTHREADED HOLE DIAMETER0.143 INCHES MINIMUM AND 0.147 INCHES MAXIMUM FIRST HOLE IN
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
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

No substitute or cross-reference records for this part.

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 403758-1?
403758-1 is a BOLT,SHOULDER.
What is the NSN for 403758-1?
403758-1 is cataloged in the U.S. Government catalog under NSN 5306-00-680-5869. 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.