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Technical Data Sheet
PartsTable / COMPONENT / 3B4618
3B4618 ✓ 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 PIN,COTTER is a the manufacturer industrial component. Key specifications include diameter: 0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, point_type: STANDARD, style_designator: STANDARD, underloop_length: 1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN, supplementary_features: REPLACEMENT NSN 5315-00-012-0123 MS24665-355, nondefinitive_spec/std_data: B TYPE AND 4 CLASS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3386, 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
3B4618
NSN: 5315-00-010-3386
FSC: 5315
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
diameter0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
materialSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
point_typeSTANDARD
style_designatorSTANDARD
underloop_length1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
supplementary_featuresREPLACEMENT NSN 5315-00-012-0123 MS24665-355
nondefinitive_spec/std_dataB TYPE AND 4 CLASS
specification/standard_data81348-FF-P-386 GOVERNMENT SPECIFICATION
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5315-00-010-3386
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3B4618 · 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
•
NONDEFINITIVE SPEC/STD DATA: B TYPE AND 4 CLASS
•
SUPPLEMENTARY FEATURES: REPLACEMENT NSN 5315-00-012-0123 MS24665-355
•
STYLE DESIGNATOR: STANDARD
•
UNDERLOOP LENGTH: 1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
SPECIFICATION/STANDARD DATA: 81348-FF-P-386 GOVERNMENT SPECIFICATION
•
DIAMETER: 0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAB TYPE AND 4 CLASS
SUPPLEMENTARY FEATURESREPLACEMENT NSN 5315-00-012-0123 MS24665-355
STYLE DESIGNATORSTANDARD
UNDERLOOP LENGTH1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
SPECIFICATION/STANDARD DATA81348-FF-P-386 GOVERNMENT SPECIFICATION
DIAMETER0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
POINT TYPESTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
4368Interchangeable
interchangeable cross-reference
interchangeable
2603P11Interchangeable
interchangeable cross-reference
interchangeable
510-8Interchangeable
interchangeable cross-reference
interchangeable
C133-6Interchangeable
interchangeable cross-reference
interchangeable
709407Interchangeable
interchangeable cross-reference
interchangeable
103386Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3B4618?
3B4618 is a PIN,COTTER.
What parts can replace 3B4618?
There are 21 known substitutes for 3B4618: 4368, 2603P11, 510-8 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3B4618?
3B4618 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3386. 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