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66-13412 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

66-13412: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, overall_width: 0.187 INCHES NOMINAL IN, overall_length: 0.560 INCHES NOMINAL IN, shear_strength: 125000 SINGLE POUNDS PER SQUARE INCH, first_flat_length: 0.325 INCHES NOMINAL IN, key_chamfer_angle: 45.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-020-4764, 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
66-13412
NSN: 5315-01-020-4764
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
overall_width0.187 INCHES NOMINAL IN
overall_length0.560 INCHES NOMINAL IN
shear_strength125000 SINGLE POUNDS PER SQUARE INCH
first_flat_length0.325 INCHES NOMINAL IN
key_chamfer_angle45.0 DEGREES NOMINAL
starting_edge_shapeCHAMFERED
material_document_and_classificationMIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-020-4764
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66-13412 · 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
•
KEY CHAMFER ANGLE: 45.0 DEGREES NOMINAL
•
FIRST FLAT LENGTH: 0.325 INCHES NOMINAL IN
•
STARTING EDGE SHAPE: CHAMFERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SHEAR STRENGTH: 125000 SINGLE POUNDS PER SQUARE INCH
•
MATERIAL: STEEL COMP 4140 OVERALL
TECHNICAL CHARACTERISTICS
KEY CHAMFER ANGLE45.0 DEGREES NOMINAL
FIRST FLAT LENGTH0.325 INCHES NOMINAL IN
STARTING EDGE SHAPECHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.560 INCHES NOMINAL IN
OVERALL WIDTH0.187 INCHES NOMINAL IN
SHEAR STRENGTH125000 SINGLE POUNDS PER SQUARE INCH
MATERIALSTEEL COMP 4140 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 66-13412?
66-13412 is a KEY,MACHINE.
What is the NSN for 66-13412?
66-13412 is cataloged in the U.S. Government catalog under NSN 5315-01-020-4764. 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.