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5109C — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5109C: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, flat_height: 0.375 INCHES NOMINAL IN, overall_height: 0.498 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, overall_length: 1.875 INCHES NOMINAL IN, round_end_length: 0.125 INCHES NOMINAL IN, first_flat_length: 1.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-455-4395, 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
5109C
NSN: 5315-00-455-4395
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flat_height0.375 INCHES NOMINAL IN
overall_height0.498 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
overall_length1.875 INCHES NOMINAL IN
round_end_length0.125 INCHES NOMINAL IN
first_flat_length1.750 INCHES NOMINAL IN
key_chamfer_angle45.0 DEGREES NOMINAL
key_chamfer_length0.031 INCHES NOMINAL IN
starting_edge_shapeCHAMFERED
NSN5315-00-455-4395
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5109C · 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: 1.750 INCHES NOMINAL IN
•
STARTING EDGE SHAPE: CHAMFERED
•
ROUND END LENGTH: 0.125 INCHES NOMINAL IN
•
KEY CHAMFER LENGTH: 0.031 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.498 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
KEY CHAMFER ANGLE45.0 DEGREES NOMINAL
FIRST FLAT LENGTH1.750 INCHES NOMINAL IN
STARTING EDGE SHAPECHAMFERED
OVERALL LENGTH1.875 INCHES NOMINAL IN
ROUND END LENGTH0.125 INCHES NOMINAL IN
KEY CHAMFER LENGTH0.031 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
FLAT HEIGHT0.375 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 5
7X8Reference document
Same NSN cross-reference
Reference document — Secondary reference
319390Reference document
Same NSN cross-reference
Reference document — Secondary reference
142114Reference document
Same NSN cross-reference
Reference document — Secondary reference
305266Reference document
Same NSN cross-reference
Reference document — Secondary reference
70D1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5109C?
5109C is a KEY,MACHINE.
What parts can replace 5109C?
There are 5 known substitutes for 5109C: 7X8, 319390, 142114 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5109C?
5109C is cataloged in the U.S. Government catalog under NSN 5315-00-455-4395. 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.