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PartsTable / COMPONENT / 3021188-2
3021188-2 ✓ 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,RECESSED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 2.770 INCHES NOMINAL IN, recess_diameter: 2.970 INCHES NOMINAL IN, outside_diameter: 3.380 INCHES NOMINAL IN, style_designator: RECESSED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-844-1152, 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
3021188-2
NSN: 5310-00-844-1152
FSC: 5310
CAGE: 89926 — NEW HOLLAND CONSTRUCTION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
recess_angle45.0 DEGREES NOMINAL
hole_diameter2.770 INCHES NOMINAL IN
recess_diameter2.970 INCHES NOMINAL IN
outside_diameter3.380 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.126 INCHES NOMINAL IN
material_document_and_classificationG-4077M FSCM 73342 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-844-1152
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3021188-2 · 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
•
RECESS ANGLE: 45.0 DEGREES NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: G-4077M FSCM 73342 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
RECESS DIAMETER: 2.970 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 2.770 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.380 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.126 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
RECESS ANGLE45.0 DEGREES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONG-4077M FSCM 73342 MFR REF SINGLE MATERIAL RESPONSE OVERALL
RECESS DIAMETER2.970 INCHES NOMINAL IN
STYLE DESIGNATORRECESSED
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER2.770 INCHES NOMINAL IN
OUTSIDE DIAMETER3.380 INCHES NOMINAL IN
MATERIAL THICKNESS0.126 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
21188Interchangeable
interchangeable cross-reference
interchangeable
3100B6Interchangeable
interchangeable cross-reference
interchangeable
3100B6S557Interchangeable
interchangeable cross-reference
interchangeable
S030A250VInterchangeable
interchangeable cross-reference
interchangeable
S030-250Interchangeable
interchangeable cross-reference
interchangeable
456006Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3021188-2?
3021188-2 is a WASHER,RECESSED.
What parts can replace 3021188-2?
There are 11 known substitutes for 3021188-2: 21188, 3100B6, 3100B6S557 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3021188-2?
3021188-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-844-1152. 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