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BC1240 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, hole_diameter: 2.281 INCHES MINIMUM AND 2.297 INCHES MAXIMUM IN, overall_diameter: 4.061 INCHES MINIMUM AND 4.071 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-185-7216, 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
BC1240
NSN: 5310-01-185-7216
FSC: 5310
CAGE: 2Y614 — LINK-BELT CRANES, L.P., LLLP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
hole_diameter2.281 INCHES MINIMUM AND 2.297 INCHES MAXIMUM IN
overall_diameter4.061 INCHES MINIMUM AND 4.071 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-185-7216
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BC1240 · 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 OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
HOLE DIAMETER: 2.281 INCHES MINIMUM AND 2.297 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 4.061 INCHES MINIMUM AND 4.071 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
HOLE DIAMETER2.281 INCHES MINIMUM AND 2.297 INCHES MAXIMUM IN
OVERALL DIAMETER4.061 INCHES MINIMUM AND 4.071 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
6002-346Interchangeable
interchangeable cross-reference
interchangeable
02623Interchangeable
interchangeable cross-reference
interchangeable
2623Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BC1240?
BC1240 is a WASHER,FLAT.
What parts can replace BC1240?
There are 3 known substitutes for BC1240: 6002-346, 02623, 2623. Substitute compatibility should be verified for your specific system.
What is the NSN for BC1240?
BC1240 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-185-7216. 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