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Technical Data Sheet
PartsTable / COMPONENT / 4188809-2
4188809-2 ✓ 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 PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, first_end_style: CHAMFERED, surface_treatment: PASSIVATE OVERALL, pin_overall_length: 2.990 INCHES MINIMUM AND 3.010 INCHES MAXIMUM IN, pin_overall_diameter: 0.2495 INCHES MINIMUM AND 0.2497 INCHES MAXIMUM IN, first_end_taper_angle: 45.0 DEGREES NOMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-904-8902, 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
4188809-2
NSN: 5315-00-904-8902
FSC: 5315
CAGE: 80212 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
first_end_styleCHAMFERED
surface_treatmentPASSIVATE OVERALL
pin_overall_length2.990 INCHES MINIMUM AND 3.010 INCHES MAXIMUM IN
pin_overall_diameter0.2495 INCHES MINIMUM AND 0.2497 INCHES MAXIMUM IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.030 INCHES NOMINAL IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-904-8902
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4188809-2 · 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
•
MATERIAL: STEEL COMP 303 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL LENGTH: 2.990 INCHES MINIMUM AND 3.010 INCHES MAXIMUM IN
•
FIRST END STYLE: CHAMFERED
•
FIRST END TAPER LENGTH: 0.030 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL LENGTH2.990 INCHES MINIMUM AND 3.010 INCHES MAXIMUM IN
FIRST END STYLECHAMFERED
FIRST END TAPER LENGTH0.030 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.2495 INCHES MINIMUM AND 0.2497 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
A330Interchangeable
interchangeable cross-reference
interchangeable
BP4762Interchangeable
interchangeable cross-reference
interchangeable
412A21EInterchangeable
interchangeable cross-reference
interchangeable
1201-330-Z3CInterchangeable
interchangeable cross-reference
interchangeable
12Z12006-3Interchangeable
interchangeable cross-reference
interchangeable
19112Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4188809-2?
4188809-2 is a PIN,STRAIGHT,HEADLESS.
What parts can replace 4188809-2?
There are 11 known substitutes for 4188809-2: A330, BP4762, 412A21E and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4188809-2?
4188809-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-904-8902. 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