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| Categories | Flat Spring Washers | 
|---|---|
| Brand Name: | PM | 
| Model Number: | M6-M100, 1/4"-4" | 
| Certification: | ISO | 
| Place of Origin: | CHINA | 
| MOQ: | 20PCS | 
| Price: | USD 0.001-2 PER PCS | 
| Payment Terms: | L/C, T/T | 
| Supply Ability: | 500tons per month | 
| Delivery Time: | 15-25DAYS PER CONTAINER | 
| Packaging Details: | 25kgs/carton and 36 cartons on standard export wooden pallets | 
| Standard: | ASTM F436 | 
| Size: | 7/8" | 
| Surface: | zinc plated | 
| Mark: | Manufacturer's ID and F436 | 
| Sample: | 5pcs sample free | 
| Hardness: | 26-45HRC | 
| Type: | Round | 
| Product name: | Zinc plated surface applied with structural bolts A490 7/8" F436 Flat washer | 
Zinc plated surface applied with structural bolts A490 7/8" F436 Flat washer
F436 Material Grade are hardened flat washers which have a Rockwell Hardness value ranging between 38 to 45 HRC. These washers can either have a plain finish or can be hot dipped galvanized. The hardened flat ASTM F436 Washer is used under bolt nuts and head in order to increase the bearing area.

SIZE: 1/4" - 4", M6 -M100 .
STANDARD: ASTM F436/F436M
FINISHED: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G.
Packaging Details: a. bulk in cartons (<=25kg )+ 36CTN/wood solid Pallet
b. bulk in cartons 9"x9"x5" (<=18kg )+ 48CTN/wood solid Pallet
Supply Ability:1000 tons per month
MinimumOrder:200kgs for each specification
Trade Term:FOB/CIF/CFR/CNF/EXW/DDU/DDP
Payment :T/T, L/C , D/A , D/P , Western Union,etc
Market:South&north Amrica/Europe/ etc.
| F436 STYLES | ||
| Style | Description | Sizes | 
| Circular | Round SAE pattern | 1/4" - 4" | 
| Beveled | Square or rectangular with a beveled 1 to 6 ratio surface. For use with American standard beams and channels. | 1/2" - 1-1/2" | 
| Clipped | Circular or beveled | 1/2" - 1-1/2" beveled | 
| 1/4" - 4" circular | ||
| Extra Thick | Circular washers with a thickness of 5/16" | 1/2" - 1-1/2" circular | 
| F436 MECHANICAL PROPERTIES | |
| Plain Finish | Hot Dip Galvanized | 
| Rockwell Hardness 38 to 45 HRC | Rockwell Hardness 26 to 45 HRC | 
| F436 CHEMICAL PROPERTIES | ||
| Element | Type 1 | Type 3 | 
| Phosphorous, max | 0.04% | 0.04% | 
| Sulfur, max | 0.05% | 0.05% | 
| Silicon | - | 0.15% - 0.35% | 
| Chromium | - | 0.45% - 0.65% | 
| Nickel | - | 0.25% - 0.45% | 
| Copper | - | 0.25% - 0.45% | 
Flat Washer Sizes  | Inner Diameter (ID)  | Outer Diameter (OD)  | Washer Thickness  | 
1/2"  | 0.531"  | 1.063"  | 0.177"  | 
5/8"  | 0.688"  | 1.313"  | 0.177"  | 
3/4"  | 0.813"  | 1.468"  | 0.177"  | 
7/8"  | 0.938"  | 1.750"  | 0.177"  | 
1"  | 1.063"  | 2.000"  | 0.136" - 0.177"  | 
1-1/8"  | 1.188"  | 2.250"  | 0.136" - 0.177"  | 
1-1/4"  | 1.375"  | 2.500"  | 0.136" - 0.177"  | 
1-3/8"  | 1.500"  | 2.750"  | 0.136" - 0.177"  | 
1-1/2"  | 1.625"  | 3.000"  | 0.136" - 0.177"  | 
1-3/4"  | 1.875"  | 3.375"  | 0.280"  | 
3"  | 3.125"  | 5.500"  | 0.340"  | 
                                 
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