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Technical Data Sheet
PartsTable / COMPONENT / 326842
326842 ✓ 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 ASSY,STOP is a the manufacturer industrial component. Key specifications include hole_diameter: 0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN, outside_diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, surface_treatment: NICKEL OVERALL, material_thickness: 0.062 INCHES NOMINAL IN, external_prebent_key_width: 0.218 INCHES NOMINAL IN, internal_prebent_key_angle: 90.0 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 5310-00-330-8331, 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
326842
NSN: 5310-00-330-8331
FSC: 5310
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
hole_diameter0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
outside_diameter0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
surface_treatmentNICKEL OVERALL
material_thickness0.062 INCHES NOMINAL IN
external_key_quantity1
external_prebent_key_width0.218 INCHES NOMINAL IN
internal_prebent_key_angle90.0 DEGREES NOMINAL
external_prebent_key_length0.125 INCHES NOMINAL IN
internal_prebent_key_length0.061 INCHES NOMINAL IN
overall_distance_including_keys0.625 INCHES NOMINAL IN
material_document_and_classificationQQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-330-8331
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 326842 · 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 DOCUMENT AND CLASSIFICATION: QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 0.625 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.125 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY WIDTH: 0.218 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL DISTANCE INCLUDING KEYS0.625 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.125 INCHES NOMINAL IN
OUTSIDE DIAMETER0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.218 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
INTERNAL PREBENT KEY ANGLE90.0 DEGREES NOMINAL
HOLE DIAMETER0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
152898Interchangeable
interchangeable cross-reference
interchangeable
K390Interchangeable
interchangeable cross-reference
interchangeable
326842Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 326842?
326842 is a WASHER ASSY,STOP.
What parts can replace 326842?
There are 3 known substitutes for 326842: 152898, K390, 326842. Substitute compatibility should be verified for your specific system.
What is the NSN for 326842?
326842 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-330-8331. 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