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PartsTable / COMPONENT / 5310000085904
5310000085904 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8735 OVERALL, hole_diameter: 2.973 INCHES MINIMUM AND 3.003 INCHES MAXIMUM IN, heat_treatment: NORMALIZED, hardness_rating: 92.0 ROCKWELL B MINIMUM, outside_diameter: 3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN, style_designator: KEY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-008-5904, 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
5310000085904
NSN: 5310-00-008-5904
FSC: 5310
CAGE: A00AM — E.C.A ETABLISSEMENT CENTRAL DES APPROVISIONNEMENTS DES FORCES ARMEES ROYALES
SPECIFICATIONS
materialSTEEL COMP 8735 OVERALL
hole_diameter2.973 INCHES MINIMUM AND 3.003 INCHES MAXIMUM IN
heat_treatmentNORMALIZED
hardness_rating92.0 ROCKWELL B MINIMUM
outside_diameter3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPHOSPHATE OVERALL
material_thickness0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
external_key_quantity19
external_prebent_key_width0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
internal_prebent_key_width0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
internal_prebent_key_length0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
NSN5310-00-008-5904
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5310000085904 · 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 PREBENT KEY WIDTH: 0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY WIDTH: 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-16232 TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: KEY
•
MATERIAL: STEEL COMP 8735 OVERALL
•
HOLE DIAMETER: 2.973 INCHES MINIMUM AND 3.003 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL PREBENT KEY WIDTH0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
SURFACE TREATMENTPHOSPHATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-16232 TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORKEY
MATERIALSTEEL COMP 8735 OVERALL
HOLE DIAMETER2.973 INCHES MINIMUM AND 3.003 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MIL-W-21338Interchangeable
interchangeable cross-reference
interchangeable
MS19070-093Interchangeable
interchangeable cross-reference
interchangeable
MS19070-103Interchangeable
interchangeable cross-reference
interchangeable
MS19070-163Interchangeable
interchangeable cross-reference
interchangeable
MS19070-123Interchangeable
interchangeable cross-reference
interchangeable
08P10847-2100Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5310000085904?
5310000085904 is a WASHER,KEY.
What parts can replace 5310000085904?
There are 19 known substitutes for 5310000085904: MIL-W-21338, MS19070-093, MS19070-103 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5310000085904?
5310000085904 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-008-5904. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026