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BCP4018 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-155-1905, 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
BCP4018
NSN: 5310-01-155-1905
FSC: 5310
CAGE: 3NNX8 — BRIGHTON CROMWELL LLC (USA)
SPECIFICATIONS
Part NumberBCP4018
NSN5310-01-155-1905
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BCP4018 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
37340Interchangeable
interchangeable cross-reference
interchangeable
36175Interchangeable
px4-300d
interchangeable
4000-37330 ITEM 10Interchangeable
interchangeable cross-reference
interchangeable
12759-00460Interchangeable
interchangeable cross-reference
interchangeable
3821117C2Interchangeable
interchangeable cross-reference
interchangeable
115303AInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BCP4018?
BCP4018 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace BCP4018?
There are 6 known substitutes for BCP4018: 37340, 36175, 4000-37330 ITEM 10 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BCP4018?
BCP4018 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-155-1905. 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