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256167 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

256167: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 0.500 INCHES NOMINAL IN, overall_height: 0.4995 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN, overall_length: 3.6250 INCHES NOMINAL IN, style_designator: PLAIN, mounting_hole_depth: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-335-4492, 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
256167
NSN: 5315-00-335-4492
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 08683 — BROCKWAY MOTOR TRUCKS DIV OF MACK TRUCKS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.500 INCHES NOMINAL IN
overall_height0.4995 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN
overall_length3.6250 INCHES NOMINAL IN
style_designatorPLAIN
mounting_hole_depth0.500 INCHES NOMINAL IN
starting_edge_shapeSTRAIGHT
mounting_hole_thread_class2B
mounting_hole_type_and_quantity2 THREADED
mounting_hole_nominal_thread_size0.3125 INCHES IN
mounting_hole_thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
distance_from_mounting_hole_center_to_end0.500 INCHES NOMINAL AND 3.125 INCHES NOMINAL IN
NSN5315-00-335-4492
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 256167 · 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
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: PLAIN
•
DISTANCE FROM MOUNTING HOLE CENTER TO END: 0.500 INCHES NOMINAL AND 3.125 INCHES NOMINAL IN
•
MOUNTING HOLE THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4995 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN
MOUNTING HOLE TYPE AND QUANTITY2 THREADED
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORPLAIN
OVERALL LENGTH3.6250 INCHES NOMINAL IN
OVERALL WIDTH0.500 INCHES NOMINAL IN
DISTANCE FROM MOUNTING HOLE CENTER TO END0.500 INCHES NOMINAL AND 3.125 INCHES NOMINAL IN
MOUNTING HOLE THREAD CLASS2B
MOUNTING HOLE NOMINAL THREAD SIZE0.3125 INCHES IN
MOUNTING HOLE DEPTH0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
104E54Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 256167?
256167 is a KEY,MACHINE.
What parts can replace 256167?
There is 1 known substitute for 256167: 104E54. Substitute compatibility should be verified for your specific system.
What is the NSN for 256167?
256167 is cataloged in the U.S. Government catalog under NSN 5315-00-335-4492. 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.