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9A7009 — Technical Data Sheet

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— · 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,SPLIT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 2.281 INCHES NOMINAL IN, hardness_rating: 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM, outside_diameter: 2.906 INCHES NOMINAL IN, style_designator: SPLIT, material_thickness: 0.034 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-521-4481, 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
9A7009
NSN: 5310-00-521-4481
FSC: 5310
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter2.281 INCHES NOMINAL IN
hardness_rating70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
outside_diameter2.906 INCHES NOMINAL IN
style_designatorSPLIT
material_thickness0.034 INCHES NOMINAL IN
distance_across_split_opening0.062 INCHES NOMINAL IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-521-4481
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9A7009 · 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: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: SPLIT
•
MATERIAL: STEEL COMP 1010 OVERALL
•
MATERIAL THICKNESS: 0.034 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
•
OUTSIDE DIAMETER: 2.906 INCHES NOMINAL IN
•
HOLE DIAMETER: 2.281 INCHES NOMINAL IN
•
DISTANCE ACROSS SPLIT OPENING: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORSPLIT
MATERIALSTEEL COMP 1010 OVERALL
MATERIAL THICKNESS0.034 INCHES NOMINAL IN
HARDNESS RATING70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
OUTSIDE DIAMETER2.906 INCHES NOMINAL IN
HOLE DIAMETER2.281 INCHES NOMINAL IN
DISTANCE ACROSS SPLIT OPENING0.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
8EJW4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
15096GInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
598231InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2105125InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
BB7030InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
365547InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9A7009?
9A7009 is a WASHER,SPLIT.
What parts can replace 9A7009?
There are 6 known substitutes for 9A7009: 8EJW4, 15096G, 598231 and 3 more. Substitute compatibility should be verified for your specific system.
Is 9A7009 still available?
9A7009 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: September 2026