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H643-7002-16 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

H643-7002-16: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, flat_height: 0.505 INCHES NOMINAL IN, overall_width: 0.746 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN, overall_height: 1.125 INCHES NOMINAL IN, overall_length: 6.130 INCHES NOMINAL IN, style_designator: STEPPED. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-500-7685, 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
H643-7002-16
NSN: 5315-01-500-7685
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flat_height0.505 INCHES NOMINAL IN
overall_width0.746 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
overall_height1.125 INCHES NOMINAL IN
overall_length6.130 INCHES NOMINAL IN
style_designatorSTEPPED
counterbore_depth0.310 INCHES NOMINAL IN
first_flat_length4.920 INCHES NOMINAL IN
key_chamfer_angle45.0 DEGREES NOMINAL
key_chamfer_length0.120 INCHES NOMINAL IN
mounting_hole_depth0.746 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
starting_edge_shapeCHAMFERED
NSN5315-01-500-7685
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H643-7002-16 · 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: 4.920 INCHES NOMINAL IN
•
MOUNTING HOLE TYPE AND QUANTITY: 2 UNTHREADED-COUNTERBORED
•
STARTING EDGE SHAPE: CHAMFERED
•
STYLE DESIGNATOR: STEPPED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-24645 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MOUNTING HOLE DIAMETER: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.125 INCHES NOMINAL IN
KEY CHAMFER ANGLE45.0 DEGREES NOMINAL
FIRST FLAT LENGTH4.920 INCHES NOMINAL IN
MOUNTING HOLE TYPE AND QUANTITY2 UNTHREADED-COUNTERBORED
STARTING EDGE SHAPECHAMFERED
STYLE DESIGNATORSTEPPED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-24645 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.281 INCHES NOMINAL IN
OVERALL LENGTH6.130 INCHES NOMINAL IN
OVERALL WIDTH0.746 INCHES MINIMUM AND 0.748 INCHES MAXIMUM 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H643-7002-16?
H643-7002-16 is a KEY,MACHINE.
What is the NSN for H643-7002-16?
H643-7002-16 is cataloged in the U.S. Government catalog under NSN 5315-01-500-7685. 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.