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3520-108 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3520-108: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, shank_length: 0.438 INCHES NOMINAL IN, overall_length: 0.908 INCHES NOMINAL IN, shank_diameter: 0.124 INCHES NOMINAL IN, undercut_width: 0.030 INCHES NOMINAL IN, first_end_style: SQUARE. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-189-3537, 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
3520-108
NSN: 5315-01-189-3537
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
shank_length0.438 INCHES NOMINAL IN
overall_length0.908 INCHES NOMINAL IN
shank_diameter0.124 INCHES NOMINAL IN
undercut_width0.030 INCHES NOMINAL IN
first_end_styleSQUARE
hardness_rating25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL
style_designatorUNDERCUT
shoulder_diameter0.219 INCHES NOMINAL IN
undercut_diameter0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
first_end_locationBOTH ENDS
second_shank_length0.438 INCHES NOMINAL IN
NSN5315-01-189-3537
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3520-108 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SHANK DIAMETER: 0.124 INCHES NOMINAL IN
•
SECOND SHANK DIAMETER: 0.124 INCHES NOMINAL IN
•
UNDERCUT WIDTH: 0.030 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
•
FIRST END LOCATION: BOTH ENDS
•
FIRST END STYLE: SQUARE
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL
•
SHANK LENGTH: 0.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.124 INCHES NOMINAL IN
SECOND SHANK DIAMETER0.124 INCHES NOMINAL IN
UNDERCUT WIDTH0.030 INCHES NOMINAL IN
UNDERCUT DIAMETER0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
FIRST END LOCATIONBOTH ENDS
FIRST END STYLESQUARE
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL
SHANK LENGTH0.438 INCHES NOMINAL IN
STYLE DESIGNATORUNDERCUT
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 3520-108?
3520-108 is a PIN,SHOULDER,HEADLESS.
What is the NSN for 3520-108?
3520-108 is cataloged in the U.S. Government catalog under NSN 5315-01-189-3537. 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.