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5003978 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5003978: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, shank_length: 0.643 INCHES NOMINAL IN, overall_length: 1.333 INCHES NOMINAL IN, shank_diameter: 0.125 INCHES NOMINAL IN, first_end_style: SQUARE, style_designator: SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-419-6520, 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
5003978
NSN: 5305-00-419-6520
NIINs: 004196520, 011294625
FSC: 5305 — Screws
CAGE: 95019 — DANA CORP SPICER TRANSMISSION DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
shank_length0.643 INCHES NOMINAL IN
overall_length1.333 INCHES NOMINAL IN
shank_diameter0.125 INCHES NOMINAL IN
first_end_styleSQUARE
style_designatorSHOULDER
shoulder_diameter0.190 INCHES NOMINAL IN
first_end_locationSQUARE END
second_shank_length0.643 INCHES NOMINAL IN
second_shank_diameter0.125 INCHES NOMINAL IN
second_end_relationship_with_first_endIDENTICAL
NSN5305-00-419-6520
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5003978 · 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
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 5003978?
5003978 is a PIN,SHOULDER,HEADLESS.
What is the NSN for 5003978?
5003978 is cataloged in the U.S. Government catalog under NSN 5305-00-419-6520. 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.