ASTM F436/F436M Washers Specification

Metric and Imperial(Inch) Series Hardened Steel Washers for structural use

ASTM F436/F436M Circular, Beveled, Clipped, Extra Thick Washers, Taper Washers

ASTM F436/F436M Chemical Requirements

Element	Analysis	Composition, %
		Type 1	Type 3B
P, max	Heat analysis	0.040	0.040
	Product analysis	0.050	0.045
S, max	Heat analysis	0.050	0.050
	Product analysis	0.060	0.055
Si	Heat analysis	. . .	0.15-0.35
	Product analysis	. . .	0.13-0.37
Cr	Heat analysis	. . .	0.45-0.65
	Product analysis	. . .	0.42-0.68
Ni	Heat analysis	. . .	0.25-0.45
	Product analysis	. . .	0.22-0.48
Cu	Heat analysis	. . .	0.25-0.45
	Product analysis	. . .	0.22-0.48
(A) When providing Weathering Steels to a calculated corrosion index use the Legault-Leckie formula from Guide G101.   I = 26.01 (% Cu) + 3.88( % Ni) + 1.20 (% Cr) + 1.49 (% Si) + 17.28 (% P) - 7.29 (% Cu) - 9.10( % Ni) (% P)- 33.39 (%Cu)2 (B) Weathering steel washers may also be manufactured from any of the steels listed in Table 2 of Specification A588/A588M and F3125.

ASTM F436/F436M Mechanical Requirements

ASTM F436 Hardened Circular, Clipped Circular, and Extra (Inch Washers)

Nominal WasherD Size Inch	Clipped Circular				Circular and Extra Thick
	Inside Diameter (I.D)Inch		Outside Diameter (O.D.) Inch		Thickness Standard (T) Inch		Thickness Extra Thick (T) Inch		Clipped
	min	max	min	max	min	max	min	max	Minimum Edge Distance (E)A
1/4										0.281	0.313	0.593	0.657	0.051	0.080	. . .	. . .	0.219
5/16	0.344	0.376	0.656	0.720	0.051	0.080	. . .	. . .	0.281
3/8	0.406	0.438	0.781	0.845	0.051	0.080	. . .	. . .	0.344
7/16	0.469	0.501	0.890	0.954	0.051	0.080	. . .	. . .	0.406
1/2	0.531	0.563	1.031	1.095	0.097	0.177	0.305	0.375	0.438
9/16	0.625	0.657	1.156	1.220	0.110	0.177	0.305	0.375	0.500
5/8	0.688	0.720	1.281	1.345	0.122	0.177	0.305	0.375	0.563
3/4	0.813	0.845	1.436	1.500	0.122	0.177	0.305	0.375	0.656
7/8	0.938	0.970	1.718	1.782	0.136	0.177	0.305	0.375	0.781
1	1.063	1.126	1.937	2.063	0.136	0.177	0.305	0.375	0.875
11/8	1.188	1.251	2.187	2.313	0.136	0.177	0.305	0.375	1.000
11/4	1.375	1.438	2.437	2.563	0.136	0.177	0.305	0.375	1.094
13/8	1.500	1.563	2.687	2.813	0.136	0.177	0.305	0.375	1.219
11/2	1.625	1.688	2.937	3.063	0.136	0.177	0.305	0.375	1.313
13/4	1.875	1.938	3.312	3.438	0.178B	0.28B	0.305	0.375	1.531
2	2.125	2.188	3.687	3.813	0.178B	0.28B	0.305	0.375	1.750
21/4	2.375	2.438	3.937	4.063	0.24C	0.34C	0.305	0.375	2.000
21/2	2.625	2.688	4.437	4.563	0.24C	0.34C	0.313	0.375	2.188
23/4	2.875	2.938	4.937	5.063	0.24C	0.34C	0.313	0.375	2.406
3	3.125	3.188	5.437	5.563	0.24C	0.34C	0.313	0.375	2.625
31/4	3.375	3.500	5.875	6.125	0.24C	0.34C	0.313	0.375	2.875
31/2	3.625	3.750	6.375	6.625	0.24C	0.34C	0.313	0.375	3.063
33/4	3.875	4.000	6.875	7.125	0.24C	0.34C	0.313	0.375	3.313
4	4.125	4.250	7.375	7.625	0.24C	0.34C	0.313	0.375	3.500
(A) Clipped edge E shall be not closer than 7/8 of the bolt diameter from the center of the washer. (B) 3/16 in. nominal. (C) 1/4 in. nominal. (D) Nominal washer sizes are intended for use with fasteners of the same nominal thread size.

ASTM F436 Hardened Beveled Washers (Inch Washers)

Bolt Size, in.	Square				Square Clipped
	Square Beveled and Clipped Square BeveledA						Clipped
	Side Dimension (A), in.		Nominal Inside Diameter (I.D.), in.		Mean Thickness (T) , in.	Slope or Taper in Thickness	Nominal Edge Distance(E),B in.
	min	max	min	max	. . .	. . .	. . .
1/2	1.718	1.782	0.531	0.563	0.312	1:6	0.438
5/8	1.718	1.782	0.688	0.720	0.312	1:6	0.562
3/4	1.718	1.782	0.812	0.844	0.312	1:6	0.656
7/8	1.718	1.782	0.938	0.970	0.312	1:6	0.781
1	1.718	1.782	1.125	1.188	0.312	1:6	0.781
11/8	2.187	2.313	1.250	1.313	0.312	1:6	0.875
11/4	2.187	2.313	1.380	1.443	0.312	1:6	1.000
13/8	2.187	2.313	1.500	1.563	0.312	1:6	1.094
11/2	2.187	2.313	1.625	1.688	0.312	1:6	1.219
(A) Rectangular beveled washers shall conform to the dimensions shown above, except that one side may be longer than that shown for the A dimension. (B) Clipped edge E shall not be closer than 7/8 of the bolt diameter from the center of the washer.

ASTM F436 Washer Dimensional Tolerances (Inch washers)

Dimensional Characteristics	<1 in.  Nominal Size	1 through 11/2 in. Nominal Size	>11/2 through 3 in. Nominal Size	>3 in.  Nominal Size
Flatness: max deviation from straightedge placed on cut side shall not exceed (in.)	0.010	0.015	0.020	0.032
Concentricity, in.: center of hole to outside  diameter	0.030 FIRA	0.060 FIRA	0.090 FIRA	0.250 FIRA
Burr shall not project above immediately adjacent washer surface more than (in.)	0.010	0.015	0.020	0.025
(A) Full indicator reading.

ASTM F436M Dimensions of Circular Washers (Metric Washers)

Nominal Washer Size, mm A	Inside Diameter (A), mm		Outside Diameter (B), mm		Thickness (C), mm		Clipped Width (E), mm, min B
	min	max	min	max	min	max
12	14.0	14.4	25.7	27.0	3.1	4.6	10.5
14	16.0	16.4	28.7	30.0	3.1	4.6	12.2
16	18.0	18.4	32.4	34.0	3.1	4.6	14.0
20	22.0	22.5	40.4	42.0	3.1	4.6	17.5
22	24.0	24.5	42.4	44.0	3.4	4.6	19.2
24	26.0	26.5	48.4	50.0	3.4	4.6	21.0
27	30.0	30.5	54.1	56.0	3.4	4.6	23.6
30	33.0	33.6	58.1	60.0	3.4	4.6	26.2
36	39.0	39.6	70.1	72.0	3.4	4.6	31.5
42	45.0	45.6	81.8	84.0	4.6	7.2	36.7
48	52.0	52.7	92.8	95.0	4.6	7.2	42.0
56	62.0	62.7	104.8	107.0	6.1	8.7	49.0
64	70.0	70.7	115.8	118.0	6.1	8.7	56.0
72	78.0	78.7	127.5	130.0	6.1	8.7	63.0
80	86.0	86.9	139.5	142.0	6.1	8.7	70.0
90	96.0	96.9	156.5	159.0	6.1	8.7	78.7
100	107.0	107.9	173.5	176.0	6.1	8.7	87.5
(A) Nominal washer sizes are intended for use with fasteners of the same nominal thread diameter. (B) Washers may be clipped on one side not closer to the center of the washer than width E.

ASTM F436M Hardened Beveled Washers (Metric Washers)

Nominal Washer Size, mmA	Inside Diameter (I.D.), mm		Side Width (A), mm		Thickness (T), mm		Clipped Width (E)
	min	max	min	max	min	max	mm,B min
12	14.0	14.4	43.0	45.0	7.5	8.5	10.5
14	16.0	16.4	43.0	45.0	7.5	8.5	12.2
16	18.0	18.4	43.0	45.0	7.5	8.5	14.0
20	22.0	22.5	43.0	45.0	7.5	8.5	17.5
22	24.0	24.5	43.0	45.0	7.5	8.5	19.2
24	26.0	26.5	43.0	45.0	7.5	8.5	21.0
27	30.0	30.5	56.0	58.0	7.5	8.5	23.6
30	33.0	33.6	56.0	58.0	7.5	8.5	26.2
36	39.0	39.6	56.0	58.0	7.5	8.5	31.5
(A) Nominal washer sizes are intended for use with fasteners of the same nominal thread diameter. (B) Washers may be clipped on one side not closer to the center of the was than width E

ASTM F436M Washer Dimensional Tolerances (Metric Washers)

Dimensional Characteristics	12mm through 16 mm  Nominal Size	>16 mm  Nominal Size
Flatness: max deviation from straightedge placed on cut side shall not exceed	B	B
Concentricity, in.: center of hole to outside diameter	0.6 mm FIRA	0.9 mm FIRA
Burr shall not project above immediately adjacent washer surface more than (mm)	0.25 mm	0.25 mm
(A) Full indicator runout. (B) Flat within 0.01mm/mm of Outside Diameter

ASTM F436/F436M Bolting Surface Treatment Specifications

ASTM F436/F436M Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

Type	Marking
ASTM F436/F436M Type 1	TB F436 1
ASTM F436/F436M Type 3	TB F436 3

ASTM F436/F436M Supplementary Requirements