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PartsTable / COMPONENT / 21835 FIND 51
21835 FIND 51 ✓ 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,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1330 OR STEEL COMP 4130 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.504 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN, recess_diameter: 0.604 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN, outside_diameter: 0.875 INCHES NOMINAL IN, style_designator: RECESSED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-149-9116, 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
21835 FIND 51
NSN: 5310-00-149-9116
FSC: 5310
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 1330 OR STEEL COMP 4130 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.504 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
recess_diameter0.604 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
outside_diameter0.875 INCHES NOMINAL IN
style_designatorRECESSED
surface_treatmentCADMIUM OVERALL
material_thickness0.078 INCHES NOMINAL IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
minimum_tensile_strength125000 POUNDS PER SQUARE INCH LBS
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-149-9116
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21835 FIND 51 · 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: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL COMP 1330 OR STEEL COMP 4130 OVERALL
•
STYLE DESIGNATOR: RECESSED
•
SURFACE TREATMENT: CADMIUM OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
RECESS ANGLE: 90.0 DEGREES NOMINAL
•
MINIMUM TENSILE STRENGTH: 125000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 1330 OR STEEL COMP 4130 OVERALL
STYLE DESIGNATORRECESSED
SURFACE TREATMENTCADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
RECESS ANGLE90.0 DEGREES NOMINAL
MINIMUM TENSILE STRENGTH125000 POUNDS PER SQUARE INCH LBS
OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
MATERIAL THICKNESS0.078 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
MS20002C5Interchangeable
interchangeable cross-reference
interchangeable
938.75.11.102Interchangeable
interchangeable cross-reference
interchangeable
21140-33Interchangeable
interchangeable cross-reference
interchangeable
5678-5Interchangeable
interchangeable cross-reference
interchangeable
MS20002C8Interchangeable
interchangeable cross-reference
interchangeable
10121636Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21835 FIND 51?
21835 FIND 51 is a WASHER,RECESSED.
What parts can replace 21835 FIND 51?
There are 12 known substitutes for 21835 FIND 51: MS20002C5, 938.75.11.102, 21140-33 and 9 more. Substitute compatibility should be verified for your specific system.
Is 21835 FIND 51 still available?
21835 FIND 51 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