16 catalogued sizes, dimensioned to BS 4518. Pick any row and the technical drawing redraws to it.
Bonded Sealing Washers to BS 4518 are catalogued in sizes M4 to M36, with id 4.1-36.5 mm, od 8-46 mm, thick 1-2.5 mm. 16 sizes are held in the table below, and the technical drawing redraws to whichever row you select.
Standard
BS 4518
Size range
M4-M36
ID
4.1-36.5 mm
OD
8-46 mm
Catalogued sizes
16
Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.
AISI 420SUS420J1 · SUS420J2 · EN 1.4021 · EN 1.4028 · 20Cr13 · 30Cr13
AISI 431SUS431 · EN 1.4057 · X17CrNi16-2
C1
C3
C4
AISI 440A
AISI 440B
AISI 440CSUS440C · EN 1.4125
Ferritic Stainless Steel
AISI 430SUS430 · EN 1.4016 · X6Cr17 · 10Cr17
F1
AISI 434
AISI 444
Precipitation-Hardening Stainless Steel
17-4 PHAISI 630 · UNS S17400 · SUS630 · EN 1.4542 · X5CrNiCuNb16-4
15-5 PHUNS S15500
17-7 PHUNS S17700
Duplex and Super Duplex Stainless Steel
Duplex 2205UNS S31803 · UNS S32205 · EN 1.4462
Super Duplex 2507UNS S32750 · EN 1.4410
D2
D4
D6
D8
Lean Duplex 2101UNS S32101
Super Duplex S32760UNS S32760 · EN 1.4501
Carbon Steel
Low-Carbon Steel
SAE 1006
SAE 1008
SAE 1010
SAE 1018
SAE 1020
Q195
Q235
SAE 1012
SAE 1015
Q215
ML08
ML08Al
ML10
ML15
ML20
SWRCH6A
SWRCH8A
SWRCH10A
SWRCH12A
SWRCH15A
SWRCH18A
Medium-Carbon Steel
SAE 1035
SAE 1045
S45C
C45
SAE 1030
SAE 1040
SAE 1050
30
35
40
45
50
S35C
S40C
S50C
C35
C40
High-Carbon Steel
SAE 1060
SAE 1070
65Mn
SAE 1065
SAE 1075
SAE 1080
SAE 1085
SAE 1090
SAE 1095
60
65
70
75
80
85
Cold-Heading Steel
SWRCH22A
10B21
SWRCH22K
SWRCH25K
SWRCH30K
SWRCH35K
SWRCH40K
ML20Mn
ML25
ML30
ML35
ML40
15B25
Alloy Steel
Chromium Steel
40Cr
45Cr
AISI 5140
SAE 5140
AISI 5120
SAE 5120
SCr420
SCr440
Chromium-Molybdenum Steel
35CrMo
42CrMo
AISI 4140
SCM435
SCM440
42CrMo4
30CrMo
AISI 4130
SAE 4130
SAE 4140
AISI 4142
AISI 4145
SCM415
SCM420
SCM445
EN 1.7220
EN 1.7225
25CrMo4
34CrMo4
Nickel-Chromium-Molybdenum Steel
AISI 4340
SAE 4340
40CrNiMo
SNCM439
EN 1.6511
36CrNiMo4
Boron Alloy Steel
10B22
10B21
15B21
15B25
20MnTiB
20Mn2B
35VB
40MnB
Bearing Steel
Bearing Steel
GCr15
AISI 52100SAE 52100 · UNS G52986
SUJ2
100Cr6EN 1.3505
GCr15SiMn
Spring Steel
Carbon Spring Steel
SAE 1065
SAE 1070
SAE 1075
SAE 1080
SAE 1095
65
70
75
80
65Mn
Silicon-Manganese Spring Steel
60Si2Mn
60Si2MnA
SUP6
SUP7
Chromium-Vanadium Spring Steel
50CrVA
SAE 6150
AISI 6150
SUP10
Stainless Spring Steel
AISI 301
SUS301
EN 1.4310
AISI 302
AISI 304
AISI 316
17-7 PH
Aluminum and Aluminum Alloys
Commercially Pure Aluminum
1050
1060
1070
1100
2xxx Series Aluminum
2024
2011
2014
2017
5xxx Series Aluminum
5052
5083
5754
6xxx Series Aluminum
6061
6061-T6
6063
6082
6082-T6
7xxx Series Aluminum
7075
7075-T6
7005
7050
7075-T73
Brass
Free-Cutting Brass
C36000
H62
HPb59-1
C3601
C3602
C3604
CuZn36Pb3
CuZn39Pb3
EN CW614N
EN CW617N
H65
Lead-Free Brass
C69300
C27450
CW510L
CW511L
Naval Brass
C46400
CuZn39Sn1
Bronze
Silicon Bronze
C65500
C65100
C65600
Phosphor Bronze
C51000
C52100
CuSn6
CuSn8
Aluminum Bronze
C95400
C95500
C63000
CuAl10Ni5Fe4
Copper
Copper
C11000
T2
C10100
C10200
C12200
T1
TU1
TU2
Titanium and Titanium Alloys
Commercially Pure Titanium
Grade 2
Grade 1
Grade 3
Grade 4
TA1
TA2
TA3
Alpha-Beta Titanium Alloys
Grade 5
Ti-6Al-4V
TC4
UNS R56400
Low-Interstitial Grade
Grade 23
Ti-6Al-4V ELI
UNS R56407
Other Titanium Fastener Alloys
Ti-6Al-6V-2Sn
Ti-6Al-2Sn-4Zr-2Mo
Beta-C titanium
Ti-10V-2Fe-3Al
Nickel and Nickel Alloys
Commercially Pure Nickel
Nickel 200
UNS N02200
Nickel 201
UNS N02201
Inconel Alloys
Inconel 625UNS N06625
Inconel 718UNS N07718
Inconel 600UNS N06600
Inconel 601UNS N06601
Inconel 686UNS N06686
Inconel X-750UNS N07750
Monel Alloys
Monel 400UNS N04400
Monel K-500UNS N05500
Hastelloy Alloys
Hastelloy C-276UNS N10276
Hastelloy C-22UNS N06022
Hastelloy B-2UNS N10665
Hastelloy B-3UNS N10675
Hastelloy XUNS N06002
Other Nickel Alloys
Alloy 20UNS N08020
Alloy 625
Alloy 718
Alloy 825UNS N08825
Alloy 925UNS N09925
Iron-Nickel and High-Temperature Alloys
A286
A-286
UNS S66286
EN 1.4980
Invar
Invar 36
Alloy 36
UNS K93600
FeNi36
Alloy 42
Alloy 42
UNS K94100
FeNi42
Tool Steel and Specialty Hardened Steel
Tool Steel and Specialty Hardened Steel
AISI D2
AISI H13
SKD11
Cr12MoV
AISI O1
AISI A2
AISI S7
SKD61
9CrSi
Structural and Construction Steel
Structural and Construction Steel
ASTM A36
Q235B
Q355B
S355JR
Q235C
Q355C
S235JR
S275JR
S355J2
Technical Drawing
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Request a Quotation for Bonded Sealing Washers
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (BS 4518)
Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.
Bonded Sealing Washers conform to BS 4518. As washers, they are specified by the dimensions in the table below; this page also covers materials, finishes and typical uses.
What Are Bonded Sealing Washers?
Bonded Sealing Washers are washers defined by BS 4518. They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.
Materials & Finishes
Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.
Bonded Sealing Washers are supplied to order. Pricing starts from approximately US$0.050 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
01
Cold heading
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
02
Thread rolling
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
03
Heat treatment
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
04
Surface treatment
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
Which standard governs Bonded Sealing Washers?
Bonded Sealing Washers are manufactured to BS 4518. The dimensional values on this page follow that standard.
What sizes are available for Bonded Sealing Washers?
The table on this page lists 16 sizes for Bonded Sealing Washers, ranging from M4 to M36. Sizes outside the table can be quoted on request.
In which materials are Bonded Sealing Washers supplied?
Bonded Sealing Washers are supplied in carbon steel (zinc plated / HDG) and stainless A2 / A4, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Bonded Sealing Washers.
How do I request a quotation?
Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.
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