National Stock number : 5310-00-083-9303
Concave Washer
| Available Quantity | 15,107 |
| Available Conditions | NS NE SV |
| Classification | Nuts and Washers - FSC 5310 |
| Schedule B | 7318220000 |
| Stock Check Date | 11/17/2025 |
Part-Number.info Quality System
- ISO 9001:2015 + AS9120B Certifed
- Audited supply chain
- Counterfeit Parts Prevention
- 100% Product Inspections
- 7 Year Record Retention
- HAZMAT Certified
- ITAR and DDTC Registered
Product Properties
Description
Concave Washer
Hole Diameter
0.252in. and 0.258in. ⁓17/64"
Radius
0.235in. and 0.240in.
Outside Diameter
0.375in. and 0.385in.
Recess Depth
0.040in. and 0.050in.
Material Thickness
0.078in. and 0.088in.
Hardness Rating
38.0 rockwell c and 44.0 rockwell c
Surface Finish
63.0 microinches counterbore wall
Heat Treatment
as fabricated
Material
steel comp 8740 or steel comp 8630 or steel comp 4130 or steel comp 4027
Material Document And Classification
MIL-S-6049 mil spec 1st material response or MIL-S-6050 mil spec 2nd material response or MIL-S-6758 mil spec 3rd material response or MIL-S-18729 mil spec 3rd material response or astm A322 assn std 4th material response
Surface Treatment
cadmium and chromate
Surface Treatment Document And Classification
QQ-P-416, ty 2, cl 3 fed spec single treatment response
Style Designator
concave
Specification/standard Data
81205-BACW10Au manufacturers standard
