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3180976 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3180976: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include overall_width: 0.417 INCHES MINIMUM AND 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM0.420 INCHES MAXIMUM IN, overall_height: 0.4995 INCHES MINIMUM AND 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM0.5000 INCHES MAXIMUM IN, overall_length: 1.498 INCHES MINIMUM AND 1.498 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN, style_designator: PLAINPLAIN, countersink_angle: 90.0 DEGREES NOMINAL90.0 DEGREES NOMINAL, mounting_hole_depth: 0.417 INCHES MINIMUM AND 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM0.420 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-351-9490, 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
3180976
NSN: 5315-01-351-9490
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
overall_width0.417 INCHES MINIMUM AND 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM0.420 INCHES MAXIMUM IN
overall_height0.4995 INCHES MINIMUM AND 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM0.5000 INCHES MAXIMUM IN
overall_length1.498 INCHES MINIMUM AND 1.498 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN
style_designatorPLAINPLAIN
countersink_angle90.0 DEGREES NOMINAL90.0 DEGREES NOMINAL
mounting_hole_depth0.417 INCHES MINIMUM AND 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM0.420 INCHES MAXIMUM IN
starting_edge_shapeSTRAIGHTSTRAIGHT
mounting_hole_diameter0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
mounting_hole_thread_class3B3B
mounting_hole_type_and_quantity2 THREADED-COUNTERSUNK2 THREADED-COUNTERSUNK
mounting_hole_nominal_thread_size0.250 INCHES0.250 INCHES IN
mounting_hole_thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF)
NSN5315-01-351-9490
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3180976 · 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
•
MOUNTING HOLE TYPE AND QUANTITY: 2 THREADED-COUNTERSUNK2 THREADED-COUNTERSUNK
•
STARTING EDGE SHAPE: STRAIGHTSTRAIGHT
•
STYLE DESIGNATOR: PLAINPLAIN
•
MOUNTING HOLE DIAMETER: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
•
DISTANCE FROM MOUNTING HOLE CENTER TO END: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4995 INCHES MINIMUM AND 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM0.5000 INCHES MAXIMUM IN
MOUNTING HOLE TYPE AND QUANTITY2 THREADED-COUNTERSUNK2 THREADED-COUNTERSUNK
STARTING EDGE SHAPESTRAIGHTSTRAIGHT
STYLE DESIGNATORPLAINPLAIN
MOUNTING HOLE DIAMETER0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
OVERALL LENGTH1.498 INCHES MINIMUM AND 1.498 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN
OVERALL WIDTH0.417 INCHES MINIMUM AND 0.417 INCHES MINIMUM AND 0.420 INCHES MAXIMUM0.420 INCHES MAXIMUM IN
DISTANCE FROM MOUNTING HOLE CENTER TO END0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
MOUNTING HOLE THREAD CLASS3B3B
MOUNTING HOLE NOMINAL THREAD SIZE0.250 INCHES0.250 INCHES IN
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 3180976?
3180976 is a KEY,MACHINE.
What is the NSN for 3180976?
3180976 is cataloged in the U.S. Government catalog under NSN 5315-01-351-9490. 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.