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Technical Data Sheet
PartsTable / COMPONENT / E2551
E2551 ✓ 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 STRAPPING,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.193 INCHES NOMINAL IN, overall_diameter: 0.281 INCHES NOMINAL 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 5310-00-639-1588, 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
E2551
NSN: 5310-00-639-1588
FSC: 5310
CAGE: K0407 — RBSL WASHINGTON (GBR)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.193 INCHES NOMINAL IN
overall_diameter0.281 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classification2024,T4 MFR REF SINGLE MATERIAL RESPONSE OVERALL
general_characteristics_item_descriptionPLASTIC; APPROX 0.312 IN. W; BLACK; HOLES ALONG ENTIRE LG APPROX 0.250 IN. C TO C IN
NSN5310-00-639-1588
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: E2551 · 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 DOCUMENT AND CLASSIFICATION: 2024,T4 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: ALUMINUM ALLOY 2024 OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.193 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
OVERALL DIAMETER: 0.281 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION2024,T4 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.193 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.031 INCHES NOMINAL IN
OVERALL DIAMETER0.281 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
AV5Interchangeable
interchangeable cross-reference
interchangeable
E25-51Interchangeable
interchangeable cross-reference
interchangeable
9746821-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is E2551?
E2551 is a STRAPPING,ELECTRICAL.
What parts can replace E2551?
There are 3 known substitutes for E2551: AV5, E25-51, 9746821-2. Substitute compatibility should be verified for your specific system.
What is the NSN for E2551?
E2551 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-639-1588. 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