ASTM F436 Washer
Specification
CHEMICAL & MECHANICAL COMPOSITION
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Detailed Information
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ASTM F436 Hardened Washers are used to give tightness to the joint, to prevent leakage and to distribute pressure under the head of nut or bolt. These are designed for general purpose like with bolts, nuts, studs and other threaded fasteners. ASTM F436 square washers are available in various sizes, forms. They cover pressure temperature ratings, materials, dimensions, tolerances etc.
ASTM F436 Lock washers prevents nuts and bolts from turning, slipping because of vibration and torque. This works by adding tension to a fastener assembly. These are thus used in various other industries. ASTM F436 Flat washers can be found in various sizes and it also has various dimensions and specifications. For smooth bearing surface, it is placed under the head of a bolt or nut. ASTM Bevel washers comes under square or rectangular shape in nominal sizes like ½ to 1 ½ inches with a beveled 1 to 6 ratios surface for use with American Standard.
Let’s understand what is F436, this is the material grade which is a flat washer that has a value ranging from 38 to 45 HRC. The ASTM F436 washers is used under bolt nuts and moves forward to increase the bearing area. This is used to protect the surfaces which was equally distributed while tightening bolt or screw and also prevent corrosion between steel screw and aluminium surface. Weathering steel ASTM F436 Type 3 washers are intended for structural use like bolts, nuts, studs and other threaded fasteners.
Specifications chart of ASTM F436 Flat Washer:
ASTM Standards |
F436 |
Additional Requirements |
NACE MR0103 / MR0175 / ISO 15156 Compliance |
Threads Configuration |
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
Dimensions |
ASME B18.2.1, B18.3 |
Additional Certifications |
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Coatings |
Cadmium, Galvanized, Black Oxide, Zinc, Xylan, Teflon. |
ASTM F436 Lock Washer Size Chart:
Size |
USS |
SAE |
||||
Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
|
#2 |
– |
– |
– |
3/32″ |
1/4″ |
0.020″ |
#4 |
– |
– |
– |
1/8″ |
5/16″ |
0.032″ |
#6 |
– |
– |
– |
5/32″ |
3/8″ |
0.049″ |
#8 |
– |
– |
– |
3/16″ |
7/16″ |
0.049″ |
#10 |
– |
– |
– |
7/32″ |
1/2″ |
0.049″ |
#12 |
– |
– |
– |
1/4″ |
9/16″ |
0.065″ |
1/4″ |
5/16″ |
0.734″ |
0.065″ |
9/32″ |
5/8″ |
0.065″ |
5/16″ |
3/8″ |
7/8″ |
0.083″ |
11/32″ |
11/16″ |
0.065″ |
3/8″ |
7/16″ |
1″ |
0.083″ |
13/32″ |
13/16″ |
0.065″ |
7/16″ |
1/2″ |
1-1/4″ |
0.083″ |
15/32″ |
15/16″ |
0.065″ |
1/2″ |
9/16″ |
1-3/8″ |
0.109″ |
17/32″ |
1-1/16″ |
0.095″ |
9/16″ |
5/8″ |
1-15/32″ |
0.109″ |
19/32″ |
1-5/32″ |
0.095″ |
5/8″ |
11/16″ |
1-3/4″ |
0.134″ |
21/32″ |
1-5/16″ |
0.095″ |
3/4″ |
13/16″ |
2″ |
0.148″ |
13/16″ |
1-15/32″ |
0.134″ |
7/8″ |
15/16″ |
2-1/4″ |
0.165″ |
15/16″ |
1-3/4″ |
0.134″ |
1-1/8″ |
1-1/4″ |
2-3/4″ |
0.165″ |
– |
– |
– |
1-1/4″ |
1-3/8″ |
3″ |
0.165″ |
– |
– |
– |
1-1/2″ |
1-5/8″ |
3-1/2″ |
0.180″ |
– |
– |
– |
1-5/8″ |
1-3/4″ |
3-3/4″ |
0.180″ |
– |
– |
– |
2″ |
2-1/8″ |
4-1/2″ |
0.213″ |
– |
– |
– |
Dimensions of ASTM F436 Spring Washers:
NOM SIZE |
Inner Dia (d) Basic Tol (+) |
Outer Dia (d1) Max |
WIDTH (b) Basic Tol (+ or -) |
THICKNESS (S) Basic Tol (+ or -) |
Weight per 1000 in Kgs |
|||
3 |
3.1 |
0.3 |
6.2 |
1.3 |
0.1 |
0.8 |
0.1 |
0.11 |
4 |
4.1 |
0.3 |
7.6 |
1.5 |
0.1 |
0.9 |
0.1 |
0.18 |
5 |
5.1 |
0.3 |
9.2 |
1.8 |
0.1 |
1.2 |
0.1 |
0.36 |
6 |
6.1 |
0.4 |
11.8 |
2.5 |
0.15 |
1.6 |
0.1 |
0.83 |
8 |
8.1 |
0.4 |
14.8 |
3 |
0.15 |
2 |
0.1 |
1.60 |
10 |
10.2 |
0.5 |
18.1 |
3.5 |
0.2 |
2.2 |
0.15 |
2.53 |
12 |
12.2 |
0.5 |
21.1 |
4 |
0.2 |
2.5 |
0.15 |
3.82 |
16 |
16.2 |
0.8 |
27.4 |
5 |
0.2 |
3.5 |
0.2 |
8.91 |
18 |
18.2 |
0.8 |
29.4 |
5 |
0.2 |
3.5 |
0.2 |
9.73 |
22 |
22.5 |
1 |
35.9 |
6 |
0.2 |
4 |
0.2 |
16.50 |
24 |
24.5 |
1 |
40 |
7 |
0.25 |
5 |
0.2 |
26.20 |
30 |
30.5 |
1.2 |
48.2 |
8 |
0.25 |
6 |
0.2 |
44.30 |
33 |
33.5 |
1.2 |
55.2 |
10 |
0.25 |
6 |
0.2 |
63.00 |
36 |
36.5 |
1.2 |
58.2 |
10 |
0.25 |
6 |
0.2 |
67.30 |
42 |
42.5 |
1.2 |
68.2 |
12 |
0.25 |
7 |
0.25 |
111.00 |
45 |
45.5 |
1.2 |
71.2 |
12 |
0.25 |
7 |
0.25 |
117.00 |
48 |
49 |
1.5 |
75 |
12 |
0.25 |
7 |
0.25 |
123.00 |
F436 Structural Washers Chemical Compatibility:
Element |
Type 1 |
Type 3 |
Phosphorous, max |
0.040% |
0.040% |
Sulfur, max |
0.050% |
0.050% |
Silicon |
– |
0.15 – 0.35% |
Chromium |
– |
0.45 – 0.65% |
Nickel |
– |
0.25 – 0.45% |
Copper |
– |
0.25 – 0.45% |
Mechanical Analysis of ASTM F436 Square Washers:
Plain Finish |
Hot Dip Galvanized |
Rockwell Hardness 38 to 45 HRC |
Rockwell Hardness 26 to 45 HRC |
ASTM F436 Flat Washers Standard Dimensions:
Bolt Size |
USS |
SAE |
||||
OD (in.) |
ID (in.) |
Thickness |
OD (in.) |
ID (in.) |
Thickness |
|
1/8 (#6) |
0.375 |
0.156 |
.036/.065 |
|||
5/32 (#8) |
0.438 |
0.188 |
.036/.065 |
|||
3/16 (#10) |
0.560 |
0.250 |
.036/.065 |
0.500 |
0.220 |
.036/.065 |
7/32 (#12) |
0.562 |
0.250 |
.051/.080 |
|||
1/4 (#14) |
0.734 |
0.312 |
.051/.080 |
0.625 |
0.281 |
.051/.080 |
5/16 |
0.875 |
0.375 |
.064/.104 |
0.688 |
0.344 |
.051/.080 |
3/8 |
1.000 |
0.438 |
.064/.104 |
0.812 |
0.406 |
.051/.080 |
7/16 |
1.250 |
0.500 |
.064/.104 |
0.922 |
0.469 |
.051/.080 |
1/2 |
1.375 |
0.562 |
.086/.132 |
1.062 |
0.531 |
.074/.121 |
9/16 |
1.469 |
0.625 |
.086/.132 |
1.156 |
0.594 |
.074/.121 |
5/8 |
1.750 |
0.688 |
.108/.160 |
1.312 |
0.656 |
.074/.121 |
3/4 |
2.000 |
0.812 |
.122/.177 |
1.469 |
0.812 |
.108/.160 |
7/8 |
2.250 |
0.938 |
.136/.192 |
1.750 |
0.938 |
.108/.160 |
1 |
2.500 |
1.062 |
.136/.192 |
2.000 |
1.062 |
.108/.160 |
1 1/8 |
2.750 |
1.250 |
.136/.192 |
2.250 |
1.250 |
.108/.160 |
1 1/4 |
3.000 |
1.375 |
.136/.192 |
2.500 |
1.375 |
.136/.192 |
1 3/8 |
3.250 |
1.500 |
.153/.213 |
2.750 |
1.500 |
.136/.213 |
1 1/2 |
3.500 |
1.625 |
.153/.213 |
3.000 |
1.625 |
.153/.213 |
1 5/8 |
3.750 |
1.750 |
.153/.213 |
|||
1 3/4 |
4.000 |
1.875 |
.153/.213 |
|||
1 7/8 |
4.250 |
2.000 |
.153/.213 |
|||
2 |
4.500 |
2.125 |
.153/.213 |
|||
2 1/4 |
4.750 |
2.375 |
.320/.248 |
|||
2 1/2 |
5.000 |
2.625 |
.210/.280 |
|||
2 3/4 |
5.250 |
2.875 |
.228/.410S |
|||
3 |
5.500 |
3.125 |
.249/.327 |
Weight Table of ASTM F436 Bevel Washer:
Bolt Size |
B |
A |
C |
Weight (lbs.) Per 1000 Pieces |
Part Numbers |
||
Outside Diameter |
Inside Diameter |
Thickness |
Domestic |
||||
Min |
Max |
Plain |
Galvanized |
||||
1⁄2 |
11⁄16 |
17⁄32 |
0.097 |
0.177 |
18 |
16440 |
16441 |
3⁄4 |
115⁄32 |
13⁄16 |
0.122 |
0.177 |
41 |
16444 |
16445 |
7⁄8 |
13⁄4 |
15⁄16 |
0.136 |
0.177 |
64 |
16446 |
16447 |
11⁄8 |
21⁄4 |
13⁄16 |
0.136 |
0.177 |
105 |
16450 |
16451 |
11⁄4 |
21⁄2 |
13⁄8 |
0.136 |
0.177 |
133 |
16452 |
16453 |
11⁄2 |
3 |
15⁄8 |
0.136 |
0.177 |
200 |
16456 |
16457 |
15⁄8 |
31⁄4 |
13⁄4 |
0.178 |
0.28 |
320 |
19481* |
19482* |
17⁄8 |
31⁄2 |
2 |
0.178 |
0.28 |
360 |
16471* |
16472 |
2 |
33⁄4 |
21⁄8 |
0.178 |
0.28 |
380 |
16460 |
16461 |
21⁄4 |
4 |
23⁄8 |
0.24 |
0.34 |
560 |
16462 |
16463 |
23⁄4 |
5 |
27⁄8 |
0.24 |
0.34 |
920 |
16611 |
16612 |
3 |
51⁄2 |
31⁄8 |
0.24 |
0.34 |
1040 |
16613 |
16614 |
31⁄2 |
61⁄2 |
35⁄8 |
0.24 |
0.34 |
1633 |
18490 |
18460 |
33⁄4 |
7 |
37⁄8 |
0.24 |
0.34 |
1880 |
– |
– |
4 |
71⁄2 |
41⁄8 |
0.24 |
0.34 |
2200 |
18461 |
18462 |
ASTM F436 Washer Applications:
- Power Generation
- Petrochemicals
- Gas Processing
- Pharmaceuticals
- Sea Water Equipment