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7526-40-684-6143 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7526-40-684-6143: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OVERALL, overall_length: 6.625 INCHES NOMINAL IN, undercut_width: 0.250 INCHES NOMINAL IN, style_designator: UNDERCUT, shoulder_diameter: 5.485 INCHES MINIMUM AND 5.515 INCHES MAXIMUM IN, undercut_diameter: 4.079 INCHES MINIMUM AND 4.089 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-424-8155, 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
7526-40-684-6143
NSN: 5315-01-424-8155
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 53700 — CPS INTERNATIONAL LTD (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OVERALL
overall_length6.625 INCHES NOMINAL IN
undercut_width0.250 INCHES NOMINAL IN
style_designatorUNDERCUT
shoulder_diameter5.485 INCHES MINIMUM AND 5.515 INCHES MAXIMUM IN
undercut_diameter4.079 INCHES MINIMUM AND 4.089 INCHES MAXIMUM IN
nominal_thread_size4.250 INCHES IN
second_shank_length3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
second_shank_diameter4.239 INCHES MINIMUM AND 4.240 INCHES MAXIMUM IN
thread_series_designatorUN
material_document_and_classificationMIL-S-5000, COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-424-8155
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7526-40-684-6143 · 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
•
SECOND SHANK DIAMETER: 4.239 INCHES MINIMUM AND 4.240 INCHES MAXIMUM IN
•
UNDERCUT WIDTH: 0.250 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 4.079 INCHES MINIMUM AND 4.089 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: UNDERCUT
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000, COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 4.250 INCHES IN
•
SHOULDER DIAMETER: 5.485 INCHES MINIMUM AND 5.515 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SECOND SHANK DIAMETER4.239 INCHES MINIMUM AND 4.240 INCHES MAXIMUM IN
UNDERCUT WIDTH0.250 INCHES NOMINAL IN
UNDERCUT DIAMETER4.079 INCHES MINIMUM AND 4.089 INCHES MAXIMUM IN
STYLE DESIGNATORUNDERCUT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000, COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH6.625 INCHES NOMINAL IN
NOMINAL THREAD SIZE4.250 INCHES IN
SHOULDER DIAMETER5.485 INCHES MINIMUM AND 5.515 INCHES MAXIMUM IN
SECOND SHANK LENGTH3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
MATERIALSTEEL COMP E4340 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 7526-40-684-6143?
7526-40-684-6143 is a PIN,SHOULDER,HEADLESS.
What is the NSN for 7526-40-684-6143?
7526-40-684-6143 is cataloged in the U.S. Government catalog under NSN 5315-01-424-8155. 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.