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Technical Data Sheet
PartsTable / COMPONENT / 7764909
7764909 ✓ 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: 0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN, hole_diameter: 2.297 INCHES MINIMUM AND 2.328 INCHES MAXIMUM IN, overall_diameter: 3.984 INCHES MINIMUM AND 4.016 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND, end_item_identification: MULTIPLE LAUNCH ROCKET SYSTEM (MLRS). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-776-4909, 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
7764909
NSN: 5310-00-776-4909
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1012 OR STEEL COMP 1017 OVERALL
thickness0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
hole_diameter2.297 INCHES MINIMUM AND 2.328 INCHES MAXIMUM IN
overall_diameter3.984 INCHES MINIMUM AND 4.016 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-776-4909
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7764909 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A108 ASSN STD 3RD MATERIAL RESPONSE OR ASTM A108 ASSN STD 4TH MATERIAL RESPONSE OR ASTM A108 ASSN STD 5TH MATERIAL RESPONSE OR ASTM A108 ASSN STD 6TH MATERIAL RESPONSE OR ASTM A576 ASSN STD 7TH MATERIAL RESPONSE OR ASTM A576 ASSN STD 8TH MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1012 OR STEEL COMP 1017 OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 3.984 INCHES MINIMUM AND 4.016 INCHES MAXIMUM IN
•
THICKNESS: 0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A108 ASSN STD 3RD MATERIAL RESPONSE OR ASTM A108 ASSN STD 4TH MATERIAL RESPONSE OR ASTM A108 ASSN STD 5TH MATERIAL RESPONSE OR ASTM A108 ASSN STD 6TH MATERIAL RESPONSE OR ASTM A576 ASSN STD 7TH MATERIAL RESPONSE OR ASTM A576 ASSN STD 8TH MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1012 OR STEEL COMP 1017 OVERALL
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER3.984 INCHES MINIMUM AND 4.016 INCHES MAXIMUM IN
THICKNESS0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
HOLE DIAMETER2.297 INCHES MINIMUM AND 2.328 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
9416649Interchangeable
interchangeable cross-reference
interchangeable
5553209Interchangeable
interchangeable cross-reference
interchangeable
FFB187/01-702Interchangeable
interchangeable cross-reference
interchangeable
52-C-49 1/2Interchangeable
interchangeable cross-reference
interchangeable
846-50Interchangeable
interchangeable cross-reference
interchangeable
782Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7764909?
7764909 is a WASHER,FLAT.
What parts can replace 7764909?
There are 24 known substitutes for 7764909: 9416649, 5553209, FFB187/01-702 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7764909?
7764909 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-776-4909. 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