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L3400307-003 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

L3400307-003: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 632 OVERALL, hole_diameter: 2.266 INCHES NOMINAL IN, outside_diameter: 2.870 INCHES NOMINAL IN, special_features: HEAT TREAT TO COND RH1075 PER ST0111LA0008 ROCKWELL INTERNATIONAL CORP, style_designator: KEY, material_thickness: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-194-9218, 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
L3400307-003
NSN: 5310-01-194-9218
FSC: 5310 — Nuts and Washers
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialSTEEL COMP 632 OVERALL
hole_diameter2.266 INCHES NOMINAL IN
outside_diameter2.870 INCHES NOMINAL IN
special_featuresHEAT TREAT TO COND RH1075 PER ST0111LA0008 ROCKWELL INTERNATIONAL CORP
style_designatorKEY
material_thickness0.125 INCHES NOMINAL IN
internal_key_quantity1
internal_straight_key_width0.290 INCHES NOMINAL IN
material_document_and_classificationAMS 5520,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.812 INCHES NOMINAL IN
NSN5310-01-194-9218
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: L3400307-003 · 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: 0.290 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.812 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5520,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.870 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 632 OVERALL
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.290 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.812 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5520,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.870 INCHES NOMINAL IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
SPECIAL FEATURESHEAT TREAT TO COND RH1075 PER ST0111LA0008 ROCKWELL INTERNATIONAL CORP
MATERIALSTEEL COMP 632 OVERALL
INTERNAL KEY QUANTITY1
HOLE DIAMETER2.266 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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is L3400307-003?
L3400307-003 is a WASHER,KEY.
What is the NSN for L3400307-003?
L3400307-003 is cataloged in the U.S. Government catalog under NSN 5310-01-194-9218. 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.