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TYPE1CLASS4SIZE13 ✓ 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 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL, hole_diameter: 2.588 INCHES MINIMUM AND 2.613 INCHES MAXIMUM IN, outside_diameter: 3.063 INCHES MINIMUM AND 3.093 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.063 INCHES NOMINAL IN, external_key_quantity: 19. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-1092, 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
TYPE1CLASS4SIZE13
NSN: 5310-00-186-1092
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
hole_diameter2.588 INCHES MINIMUM AND 2.613 INCHES MAXIMUM IN
outside_diameter3.063 INCHES MINIMUM AND 3.093 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.063 INCHES NOMINAL IN
external_key_quantity19
external_prebent_key_width0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
internal_prebent_key_width0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
internal_prebent_key_length0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
overall_distance_including_keys3.578 INCHES NOMINAL IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-186-1092
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: TYPE1CLASS4SIZE13 · 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
•
EXTERNAL KEY QUANTITY: 19
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
•
INTERNAL PREBENT KEY WIDTH: 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 3.063 INCHES MINIMUM AND 3.093 INCHES MAXIMUM IN
•
INTERNAL PREBENT KEY LENGTH: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
•
HOLE DIAMETER: 2.588 INCHES MINIMUM AND 2.613 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
EXTERNAL KEY QUANTITY19
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
INTERNAL PREBENT KEY WIDTH0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
STYLE DESIGNATORKEY
OUTSIDE DIAMETER3.063 INCHES MINIMUM AND 3.093 INCHES MAXIMUM IN
INTERNAL PREBENT KEY LENGTH0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
HOLE DIAMETER2.588 INCHES MINIMUM AND 2.613 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS3.578 INCHES NOMINAL IN
MATERIAL THICKNESS0.063 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
5310000085904Interchangeable
interchangeable cross-reference
interchangeable
MILW21338Interchangeable
interchangeable cross-reference
interchangeable
MS19069A15Interchangeable
interchangeable cross-reference
interchangeable
MS19070-093Interchangeable
interchangeable cross-reference
interchangeable
MS19070-103Interchangeable
interchangeable cross-reference
interchangeable
MS19070-163Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TYPE1CLASS4SIZE13?
TYPE1CLASS4SIZE13 is a WASHER,KEY.
What parts can replace TYPE1CLASS4SIZE13?
There are 22 known substitutes for TYPE1CLASS4SIZE13: 5310000085904, MILW21338, MS19069A15 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TYPE1CLASS4SIZE13?
TYPE1CLASS4SIZE13 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-1092. 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