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BACW10CA3CCS — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

BACW10CA3CCS: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, material: STEEL COMP H11 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL, hole_diameter: 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES TOP, hardness_rating: 52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM, recess_diameter: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-230-7066, 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
BACW10CA3CCS
NSN: 5310-00-230-7066
FSC: 5310 — Nuts and Washers
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)
SPECIFICATIONS
radius0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
materialSTEEL COMP H11 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL
hole_diameter0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES TOP
hardness_rating52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM
recess_diameter0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
outside_diameter0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
special_featuresCOLOR BLACK
style_designatorCONCAVE
surface_treatmentNICKEL AND CADMIUM OVERALL
material_thickness0.065 INCHES NOMINAL IN
specification/standard_data81205-BACW10CA MANUFACTURERS STANDARD
NSN5310-00-230-7066
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BACW10CA3CCS · 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
•
SURFACE FINISH: 32.0 MICROINCHES TOP
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2416 ASSN STD 1ST TREATMENT RESPONSE AND AMS 2416 ASSN STD 2ND TREATMENT RESPONSE OVERALL
•
RADIUS: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
•
HARDNESS RATING: 52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6487 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.065 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2416 ASSN STD 1ST TREATMENT RESPONSE AND AMS 2416 ASSN STD 2ND TREATMENT RESPONSE OVERALL
RADIUS0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
HARDNESS RATING52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORCONCAVE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6487 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
MATERIAL THICKNESS0.065 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81205-BACW10CA MANUFACTURERS STANDARD
RECESS DIAMETER0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
70189-3SReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACW10CA3CCS?
BACW10CA3CCS is a WASHER,CONCAVE.
What parts can replace BACW10CA3CCS?
There is 1 known substitute for BACW10CA3CCS: 70189-3S. Substitute compatibility should be verified for your specific system.
What is the NSN for BACW10CA3CCS?
BACW10CA3CCS is cataloged in the U.S. Government catalog under NSN 5310-00-230-7066. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.