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342930-3 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

342930-3: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8630 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN, hardness_rating: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM, recess_diameter: 0.483 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN, outside_diameter: 0.812 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-2502, 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
342930-3
NSN: 5310-00-209-2502
FSC: 5310 — Nuts and Washers
CAGE: 1WL60 — LOCKHEED MARTIN SERVICES, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 8630 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
recess_diameter0.483 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN
outside_diameter0.812 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6050 COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-209-2502
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 342930-3 · 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
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6050 COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.812 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.483 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 8630 OVERALL
•
HOLE DIAMETER: 0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050 COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.812 INCHES NOMINAL IN
MATERIAL THICKNESS0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
RECESS DIAMETER0.483 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN
MATERIALSTEEL COMP 8630 OVERALL
HOLE DIAMETER0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
SUBSTITUTES & CROSS-REFERENCES 1
MILW45595Reference document
Same NSN cross-reference
Reference document — Identification reference
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 342930-3?
342930-3 is a WASHER,RECESSED.
What parts can replace 342930-3?
There is 1 known substitute for 342930-3: MILW45595. Substitute compatibility should be verified for your specific system.
What is the NSN for 342930-3?
342930-3 is cataloged in the U.S. Government catalog under NSN 5310-00-209-2502. 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.