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5165251 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5165251: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: ALUMINUM OVERALL, hole_diameter: 0.385 INCHES NOMINAL IN, overall_width: 0.750 INCHES NOMINAL IN, split_key_length: 0.146 INCHES NOMINAL IN, material_thickness: 0.020 INCHES NOMINAL IN, external_prebent_key_length: 0.063 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-159-0099, 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
5165251
NSN: 5310-01-159-0099
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialALUMINUM OVERALL
hole_diameter0.385 INCHES NOMINAL IN
overall_width0.750 INCHES NOMINAL IN
split_key_length0.146 INCHES NOMINAL IN
material_thickness0.020 INCHES NOMINAL IN
external_prebent_key_length0.063 INCHES NOMINAL IN
overall_distance_including_keys0.896 INCHES NOMINAL IN
NSN5310-01-159-0099
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5165251 · 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
•
SPLIT KEY LENGTH: 0.146 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.063 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.896 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM OVERALL
•
HOLE DIAMETER: 0.385 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SPLIT KEY LENGTH0.146 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.063 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.896 INCHES NOMINAL IN
OVERALL WIDTH0.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
MATERIALALUMINUM OVERALL
HOLE DIAMETER0.385 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5165251?
5165251 is a WASHER,KEY.
What is the NSN for 5165251?
5165251 is cataloged in the U.S. Government catalog under NSN 5310-01-159-0099. 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.