F436 Flat Washer, Galvanized

ASTM F436 thru hardened structural flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. They are designed for general purpose and structural use with bolts, nuts, studs, and other internally and externally threaded fasteners. Dimensional specifications are governed by ASTM F436. Dimensionally comparable to the low carbon SAE Washer, but manufactured from a higher grade of steel and heat treated. F436 washers are suitable for use with many fastener grades including B7, B16, L7, and A325 and A490 structural bolts. Also used with fasteners covered in A354 and A449. Available in hot dip galvanized finish, which provides a corrosion resistant zinc coating.

Technical Data

Governing StandardsF436

ASTM F436/F436M

Covers the chemical, mechanical, and dimensional requirements for hardened steel washers for use with fasteners having nominal thread diameters of 1⁄4 through 4 in. and M12 through M100.

Mechanical PropertiesF436

Thru Hardened Steel	Per ASTM F436/F436M-16
Rockwell Hardness
Plain Finish	Hot Dip Galvanized
38-45 HRC	26-45 HRC

Chemical PropertiesF436

Per ASTM F436/F436M-16
Grade	Material	Phosphorus	Sulfur
Grade	Material	% by weight	% by weight
F325 Type 1	Carbon Steel	0.040	0.050

Dimensional SpecificationsF436

F436 thru hardened flat washer dimensions

Per ASTM F436/F436M-16
Size	Nominal	A	B	C
		Inside Diameter	Outside Diameter	Thickness	Thickness
		Inside Diameter	Outside Diameter	Min	Max
1/2	0.5000	0.5310	1.0630	0.0970	0.1770
5/8	0.6250	0.6880	1.3130	0.1220	0.1770
3/4	0.7500	0.8130	1.4680	0.1220	0.1770
7/8	0.8750	0.9380	1.7500	0.1360	0.1770
1	1.0000	1.0630	2.0000	0.1360	0.1770
1 1/8	1.1250	1.1880	2.2500	0.1360	0.1770
1 1/4	1.2500	1.3750	2.5000	0.1360	0.1770
1 3/8	1.3750	1.5000	2.7500	0.1360	0.1770
1 1/2	1.5000	1.6250	3.0000	0.1360	0.1770
1 5/8	1.6250	1.7700	3.2500	0.1780	0.2800
1 3/4	1.7500	1.8750	3.3750	0.1780	0.2800
1 7/8	1.8750	2.0000	3.5000	0.1780	0.2800
2	2.0000	2.1250	3.7500	0.1780	0.2800
2 1/4	2.2500	2.3750	4.0000	0.2400	0.3400
2 1/2	2.5000	2.6250	4.5000	0.2400	0.3400
2 3/4	2.7500	2.8750	5.0000	0.2400	0.3400
3	3.0000	3.1250	5.5000	0.2400	0.3400

All dimensions are in inches.

F436 Flat Washer, Galvanized

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Diameter	Inside Diameter	Outside Diameter	Thickness	Item #	Availability	Price	Quantity
1/2	0.5310	1.0630	0.1770	W436050G-I	In Stock	$0.10267/EA	EA	EA
5/8	0.6880	1.3130	0.1770	W436062G-I	In Stock	$0.20979/EA	EA	EA
3/4	0.8130	1.4680	0.1770	W436075G-I	In Stock	$0.24295/EA	EA	EA
7/8	0.9380	1.75	0.1770	W436087G-I	In Stock	$0.34821/EA	EA	EA
1	1.0630	2.0	0.1770	W436100G-I	In Stock	$0.47947/EA	EA	EA
1 1/8	1.1880	2.25	0.1770	W436112G-I	In Stock	$0.53468/EA	EA	EA
1 1/4	1.3750	2.5	0.1770	W436125G-I	In Stock	$0.66532/EA	EA	EA
1 3/8	1.5	2.75	0.1770	W436137G-I	In Stock	$0.73529/EA	EA	EA
1 1/2	1.6250	3.0	0.1770	W436150G-I	In Stock	$0.88745/EA	EA	EA
1 5/8	1.77	3.25	0.28	W436162G-I	In Stock	$1.00488/EA	EA	EA
1 3/4	1.8750	3.3750	0.28	W436175G-I	In Stock	$1.71347/EA	EA	EA
2	2.1250	3.75	0.28	W436200G-I	In Stock	$2.31875/EA	EA	EA
2 1/2	2.6250	4.5	0.34	W436250G-I	In Stock	$4.14097/EA	EA	EA
2 3/4	2.8750	5.0	0.34	W436275G-I	In Stock	$4.67987/EA	EA	EA
3	3.1250	5.5	0.34	W436300G-I	In Stock	$5.90052/EA	EA	EA

F436 Flat Washer, Galvanized

Technical Data

Tab 1

Governing StandardsF436

Tab 2

Mechanical PropertiesF436

Tab 3

Chemical PropertiesF436

Tab 4

Dimensional SpecificationsF436

Product Specification

Diameter

Thickness

Use

Outside Diameter

Inside Diameter