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PartsTable / COMPONENT / FWSB6N
FWSB6N ✓ 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 thickness: 0.028 INCHES NOMINAL IN, hole_diameter: 0.151 INCHES NOMINAL IN, overall_diameter: 0.312 INCHES NOMINAL IN, surface_treatment: NICKEL OVERALL, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-262-4574, 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
FWSB6N
NSN: 5310-00-262-4574
FSC: 5310
CAGE: 80249 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. (USA)
SPECIFICATIONS
thickness0.028 INCHES NOMINAL IN
hole_diameter0.151 INCHES NOMINAL IN
overall_diameter0.312 INCHES NOMINAL IN
surface_treatmentNICKEL OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-262-4574
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FWSB6N · 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
•
SURFACE TREATMENT: NICKEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.312 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.151 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.028 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTNICKEL OVERALL
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER0.312 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.151 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.028 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
397333Interchangeable
interchangeable cross-reference
interchangeable
364947Interchangeable
interchangeable cross-reference
interchangeable
2595Interchangeable
interchangeable cross-reference
interchangeable
361843-3Interchangeable
interchangeable cross-reference
interchangeable
1444Interchangeable
interchangeable cross-reference
interchangeable
149K526Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FWSB6N?
FWSB6N is a WASHER,FLAT.
What parts can replace FWSB6N?
There are 21 known substitutes for FWSB6N: 397333, 364947, 2595 and 18 more. Substitute compatibility should be verified for your specific system.
Is FWSB6N still available?
FWSB6N is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026