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306-025-0001 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

306-025-0001: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, hole_diameter: 0.382 INCHES NOMINAL IN, outside_diameter: 0.525 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.035 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-114-7973, 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
306-025-0001
NSN: 5310-01-114-7973
FSC: 5310 — Nuts and Washers
CAGE: 95542 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
hole_diameter0.382 INCHES NOMINAL IN
outside_diameter0.525 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.035 INCHES NOMINAL IN
external_prebent_key_width0.112 INCHES NOMINAL IN
external_prebent_key_length0.056 INCHES NOMINAL IN
internal_straight_key_width0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
overall_distance_including_keys0.684 INCHES MAXIMUM IN
NSN5310-01-114-7973
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 306-025-0001 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY LENGTH: 0.056 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.684 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 0.525 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.035 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
EXTERNAL PREBENT KEY WIDTH: 0.112 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.052 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY LENGTH0.056 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.684 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER0.525 INCHES MAXIMUM IN
MATERIAL THICKNESS0.035 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
EXTERNAL PREBENT KEY WIDTH0.112 INCHES NOMINAL IN
MATERIALSTEEL COMP 303 OVERALL
HOLE DIAMETER0.382 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 306-025-0001?
306-025-0001 is a WASHER,KEY.
What is the NSN for 306-025-0001?
306-025-0001 is cataloged in the U.S. Government catalog under NSN 5310-01-114-7973. 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.