TOOTHED LOCK WASHER

TOOTHED LOCK WASHER
(KS B 1325, JIS B 1255)

toothed lock washer
Size No. Applicable serew∮ d D t No. of Tooth
Internal External Miter Inch Ctiteria figure Allowable error Ctiteria figure Allowable error Ctiteria figure Allowable error Internal External
AW – 2 BW – 2 2 – 2.2 +0.20 4.8 0-0.3 0.3 ±0.025 7 8
2.3 2.3 2.3 – 2.5 5.3 0.3 7 8
2.5 2.5 2.5(2.6) – 2.7 5.7 0.3 7 8
3 3 3 – 3.2 6.5 0-0.4 0.45 ±0.035 7 8
3.5 3.5 3.5 – 3.7 7.5 0.45 8 8
4 4 4 – 4.3 8.5 0.45 8 8
4.5 4.5 4.5 – 4.8 9.5 0.5 8 8
5 5 5 – 5.3 10 0.6 ±0.04 8 10
6 6 6 – 6.4 +0.30 11 0-0.5 0.6 9 12
7 – 7 – 7.4 13 0.8 ±0.05 10 –
8 8 8 – 8.4 15 0.9 9 12
3/8 3/8 – 3/8 9.8 17.5 0.9 9 12
10 10 10 – 10.5 +0.40 18 0.9 9 12
7/16 7/16 – 7/16 11.4 19.5 0-0.6 0.9 10 12
12 12 12 – 12.5 21 1 ±0.055 10 12
1/2 1/2 – 1/2 13 22.5 1 10 12
14 14 14 – 14.5 23 1 10 12
16 16 16 5/8 16.5 26 1.2 ±0.065 12 14
18 18 18 – 19 +0.50 29 1.2 12 14
3/4 3/4 – 3/4 19.6 32 0-0.8 1.2 12 14
20 20 20 – 21 32 1.4 ±0.07 12 14
22 22 22 7/8 23 35 1.4 14 16
24 24 24 – 25 38 1.6 ±0.08 14 16
1″ 1″ – 1″ 26 41 1.6 14 16

SERRATED LOCK WASHER

SERRATED LOCK WASHER
Size No. Application Serew∮ d D t No. of Tooth
internal External Miter Inch Criteria figure Allowable error Criteria figure Allowable error Criteria figure Allowable error internal External
JZ – 3 AZ – 3 3 3.05 +0.30 6 ±0.24 0.4 ±0.03 8 10
4 4 4 5/32 4.1 8 ±0.29 0.5 8 12
5 5 5 5.1 9.2 0.6 8 12
6 6 6 6.1 +0.360 11 ±0.35 0.7 10 12
8 8 8 5/16 8.2 14 0.8 12 14
10 10 10 10.2 +0.430 18 0.9 12 16
12 12 12 12.3 20 ±0.42 1 ±0.04 14 18
14 14 14 14.3 24 1.1 16 20
16 16 16 5/8 16.3 26 1.2 16 20
18 18 18 18.5 +0.520 30 1.4 16 20
20 20 20 20.5 32.5 ±0.5 1.4 16 22
22 22 22 7/8 22.5 35 1.5 ±0.05 18 22
24 24 24 24.5 38 1.5 20 24

COUNTERSUNK EXTERNAL TOOTH LOCK WASHER
(JIS B 1255)

COUNTERSUNK EXTERNAL TOOTH LOCK WASHER
Size No. applicable serew∮ d D e t No. of Tooth
Criteria figure Allowable error Criteria figure Allowable error Criteria figure Allowable error
CW – 3 3 3.2 +0.20 6 1.8 0.4 ±0.03 8
3.5 3.5 3.7 7 2.1 0.4 8
4 4 4.3 8 2.5 0.4 8
4.5 4.5 4.8 9 1.7 0.5 ±0.035 9
5 5 5.3 10 3.1 0.5 9
6 6 6.4 +0.30 12 3.8 0.5 10
8 8 8.4 16 5.1 0.6 ±0.04 12

INTERNAL/EXTERNAL LOCK WASHER

INTERNAL/EXTERNAL LOCK WASHER
Size No. Applicable serew∮ d D t No.of Tooth
Miter Inch Criteria figure Allowable error Criteria figure Allowable error Criteria figure Allowable error Internal External
ABW – 4 4 – 4.3 +0.20 15 0-0.5 0.6 ±0.04 8 12
4.5 4.5 – 4.8 15 0.6 8 12
5 5 – 5.3 15 0.6 8 12
5.5 5.5 – 5.8 17.5 0.8 ±0.05 9 12
6 6 – 6.4 +0.30 17.5 0.8 9 12
8 8 – 8.4 22.5 0-0.6 0.9 9 12
3/8 – 3/8 9.8 26 1 ±0.055 9 14
10 10 – 10.5 +0.40 26 1 9 14
7/16 – 7/16 11.4 29 1 10 14
12 12 – 12.5 29 1 10 14
1/2 – 1/2 13 32 0-0.8 1.2 ±0.065 10 14
14 14 – 14.5 32 1.2 10 14
16 16 5/8 16.5 35 1.4 ±0.07 12 16
Chemical Requirements
SpecificationGrade C Si Mn PMax SMax Ni Cr Mo Vanadium
ASTM A193 Gr B7 0.37-0.49 0.15-0.35 0.65-1.10 0.035 0.04 0.75-1.20 0.15-0.25
ASTM A193 Gr B7M 0.37-0.49 0.15-0.35 0.65-1.10 0.035 0.04 0.75-1.20 0.15-0.25
ASTM A193 Gr B16 0.36-0.47 0.15-0.35 0.45-0.70 0.035 0.04 0.80-1.15 0.50-0.65 0.25-0.35
ASTM A193 Gr B8 Max 0.08 Max 1.00 Max 2.00 0.045 0.03 8.00-10.5 18.0-20.0
ASTM A193 Gr B8M Max 0.08 Max 1.00 Max 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.0-3.0
ASTM A193 Gr B6 Max 0215 Max 1.00 Max 1.00 0.045 0.03 11.5-13.5
ASTM A320 Gr L7 0.38-0.48 0.15-0.35 0.75-1.00 0.035 0.04 0.80-1.10 0.15-0.25
ASTM A320 Gr L7M 0.38-0.48 0.15-0.35 1.75-1.00 0.035 0.04 0.80-1.10 0.15-0.25
ASTM A320 Gr B8 Max 0.08 Max 1.00 Max 2.00 0.045 0.03 8.00-10.5 18.0-20.0
ASTM A320 Gr B8M Max 0.08 Max 1.00 Max 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.0-3.0
ASTM A325 TYPE 1 0.28-0.55 Min 0.60 0.040 0.05 Boron Min 0.0005
ASTM A325 TYPE 2 0.15-0.34 Min 0.70 0.040 0.05
ASTM A354 Gr BC 0.30-0.53 0.035 0.04
ASTM A354 Gr BD 0.30-0.53 0.035 0.04
ASTM A449 TYPE1 0.28-0.55 Min 0.60 0.040 0.05 Boron Min 0.0005
ASTM A449 TYPE 2 0.15-0.38 Min 0.70 0.040 0.05
ASTM A490 TYPE1 0.30-0.48 0.040 0.04
JIS G4303 SUS310S Max 0.08 Max 1.50 Max 2.00 0.045 0.03 19.0-22.0 24.0-26.0
JIS G4105 SCM 435 0.33-0.38 0.15-0.35 0.60-0.85 0.030 0.03 0.90-1.20 0.15-0.30
JIS G4105 SCM 440 0.38-0.43 0.15-0.35 0.60-0.85 0.030 0.03 0.90-1.20 0.15-0.30
JIS G4107 SNB 5 Min 0.10 Max 1.00 Max 1.00 0.040 0.03 4.00-6.00 0.40-0.65
JIS G4107 SNB 7 0.38-0.48 0.20-0.35 0.75-1.00 0.040 0.04 0.80-1.10 0.15-0.25
JIS G4107 SNB 16 0.36-0.44 0.15-0.35 0.45-0.70 0.040 0.04 0.80-1.15 0.50-0.65
JIS G4051 S45C 0.42-0.48 Max 0.40 0.60-0.90 0.040 0.035
ASTM A194 Gr 2H Min 0.40 Max 0.40 Max 1.00 0.040 0.05
ASTM A194 Gr 2HM Min 0.40 0.15-0.35 Max 1.00 0.040 0.05
ASTM A194 Gr 7M 0.37-0.49 0.15-0.35 0.65-1.10 0.040 0.04 0.75-1.20 0.15-0.25
ASTM A194 Gr 4 0.40-0.50 0.15-0.35 0.70-0.90 0.035 0.04 0.20-0.30
ASTM A194 Gr 7 0.37-0.49 0.15-035 0.65-1.10 0.040 0.04 0.75-1.20 0.15-0.25
ASTM A194 Gr 8 Max 0.06 Max 1.00 Max 2.00 0.045 0.03 8.00-10.5 18.0-20.0
ASTM A194 Gr 8M Max 0.08 Max 1.00 Max 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.00-3.00
ASTM A563 Gr A.B.C Max 0.55 0.012 0.15
ASTM A563 Gr Gr D Max 0.55 Min 0.30 0.040 0.05
ASTM A563 gR Gr DH 0.20-0.55 Min 0.60 0.040 0.05
Mechanical Requirements
Specification Grade Diameter inch (mm) Tesile Strength Min Yiled Strength Min E.L % Min R.A % Min Haedness Tempering Temp”F (“c) Min
HB H.B H.C
A193 Gr B7 2½ and under 125,000psi 100,000psi 16 50 1,100(593)
Over 2½ to 4 115,000psi 95,000psi 16 50 1,100(593)
A193 Gr B7M 2½ and under 105,000psi 80,000psi 18 50 200-235 93-99 1,150(620)
A193 Gr B16 2½ and under 125,000psi 105,000psi 18 50 253-319 25-34 1,200(650)
Over 2½ to 4 110,000psi 95,000psi 17 45 353-319 25-34 1,200(650)
A193GrB8.B8M All diameters 75,000psi 30,000psi 30 50 Max 223 Max 96
A193 Gr B6 Up to 4 110,000psi 85,000psi 15 50 1,100(593)
A320 Gr L7 2½ and under 125,000psi 105,000psi 16 50
A320 Gr L7M 2½ and under 100,000psi 80,000psi 18 50 Max 235 Max 99 1,150(620)
A320GrB8.B8M All diameters 75,000psi 30,000psi 35 50 Max 223 Max 96
A325 ½ to 1 120,000psi 92,000psi 248-331 24-35 800(427)
1⅛ to 1½ 105,000psi 81,000psi 14 35 223-293 19-31 800(427)
A354 Gr BC ¼ to 2½ 125,000psi 109,000psi 16 50 255-331 26-36 800(427)
Over 1 to 1½ 115,000psi 99,000psi 16 45 235-311 22-33 800(427)
A354 Gr BD ¼ to 2½ 150,000psi 130,000psi 14 40 311-363 33-39 800(427)
Over 1 to 1½ 140,000psi 115,000psi 14 40 293-363 31-39 800(427)
A449 ¼ to 1 120,000psi 92,000psi 14 35 255-321 25-34 800(427)
Over 1 to1½ 105,000psi 81,000psi 14 35 223-285 19-30 800(427)
Over 1½ to 3 90,000psi 58,000psi 14 35 183-235 800(427)
A490 ½ to 1½ 150-170ksi 130,000ksi 14 40 311-352 33-38 800(427)
JIS SUS 310S 53 kgf/㎟ 21kgf/㎟ 40 50 Max 187 Max 90
JIS SCM 435 95kgf/㎟ 80kgf/㎟ 15 50 269-331 29-35 (530-630)
JIS SCM 440 100kgf/㎟ 85kgf/㎟ 12 45 285-352 29-39 (530-630)
JIS SNB 5 70kgf/㎟ 56kgf/㎟ 16 50 (595)
JIS SNB 7 Up to 63(mm) 88kgf/㎟ 74kgf/㎟ 16 50 (595)
Over(63) to (100) 82kgf/㎟ 67kgf/㎟ 16 50 (595)
JIS SNB 16 Up to 63(mm) 88kgf/㎟ 74kgf/㎟ 18 50 (650)
Over (63) to (100) 77kgf/㎟ 67kgf/㎟ 17 50 (650)
JIS S45C 70kgf/㎟ 50kgf/㎟ 17 45 201-269 14.5-27 (550-650)
A194 Gr 2 159-352 Min 84 1,000(538)
A194 Gr 2H To 1½ 248-352 24-38 850(455)
Over 1½ 212-352 Min 95 Max 38 850(455)
159-237 Max 22 1,150
228-271 20-28 1,100
159-237 Max 22 1,100
248-352 24-38 1,100
126-300 60-105
A563 Gr A ¼ to 4 116-302 Min 68 Max 32
A563 Gr B ¼ to 1½ 121-302 Min 69 Max 32
A563 Gr C ¼ to 4 143-352 Min 78 Max 38 800(427)
A563 Gr D ¼ to 4 159-352 Min 84 Max 38 800(427)
A563 Gr DH ¼ to 4 248-352 24-38 800(427)

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