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Technical Data Sheet
PartsTable / COMPONENT / 852508
852508 ✓ 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: 89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM, hole_diameter: 0.441 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN, recess_diameter: 0.543 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN, outside_diameter: 0.771 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-595-7079, 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
852508
NSN: 5310-00-595-7079
FSC: 5310
CAGE: 09786 — ORDNANCE SUPPLY OFFICE (USA)
SPECIFICATIONS
materialSTEEL COMP 1330 OR STEEL COMP 4130 OVERALL
recess_angle89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM
hole_diameter0.441 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN
recess_diameter0.543 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
outside_diameter0.771 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
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
NSN5310-00-595-7079
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 852508 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL: STEEL COMP 1330 OR STEEL COMP 4130 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL THICKNESS: 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.543 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.441 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORRECESSED
MATERIALSTEEL COMP 1330 OR STEEL COMP 4130 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIAL THICKNESS0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
RECESS DIAMETER0.543 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
HOLE DIAMETER0.441 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
RECESS ANGLE89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM
OUTSIDE DIAMETER0.771 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
TCR505Interchangeable
interchangeable cross-reference
interchangeable
32.705Interchangeable
interchangeable cross-reference
interchangeable
6-12-R-MInterchangeable
interchangeable cross-reference
interchangeable
158562Interchangeable
Same NIIN cross-reference
interchangeable
938.75.11.104Interchangeable
Same NIIN cross-reference
interchangeable
5310PL1809515Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 852508?
852508 is a WASHER,RECESSED.
What parts can replace 852508?
There are 10 known substitutes for 852508: TCR505, 32.705, 6-12-R-M and 7 more. Substitute compatibility should be verified for your specific system.
Is 852508 still available?
852508 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