AVW-AWTH Top hat Acoustic Washers-10a0 pages

AWTH Top Hat Acoustic Washers
Integrated acoustic washer and sleeve
AVW-AWTH Top Hat Acoustic Washers-10a
Why choose AWTH Acoustic Washers?
Farrat AWTH anti vibration top hat washers are the best way
to isolate bolt through connections by providing a complete
separation of the bolt and the isolated structure.

AWTH Top Hat Acoustic Washers

Features
• Used in conjunction with acoustic / anti vibration pads to
provide a high degree of vibration isolation by providing a
resilient connection where bolt through fixings are necessary
for stability and security.
• If an acoustic washer is omitted then the anti vibration
pad will be bypassed by the fixing bolt and will therefore
offer limited isolation and the vibration can be transmitted
through the fixing bolt.
• Manufactured for durability, performance and ease of on
site installation by vulcanising zinc plated washer to a
Chloroprene (Neoprene) acoustic washer and sleeve (bush).
• Good oil, chemical and fire resistance.
• Operating temperature range from –10 to +90 ºC.
• Fire rating / building material class: B2

Applications
Any bolt through connection which requires isolation such as:
• Steelwork Isolation in building structures
• Machine tool holding down bolts
Important Note
Holes in steelwork need to be oversized to accommodate
the isolation bush, see column J of the table below.
If oversized holes are not possible then we recommend using
AWR washers which do not have an isolation sleeve.
J
B
G
D
A

AWTH Washers
AWTH 08
AWTH 10
AWTH 12
AWTH 16
AWTH 20
AWTH 24

A
mm
26
30
40
50
61
65

B
mm
8.5
10.5
13.0
17.0
21.0
25.0

D
mm
5.6
6.0
6.5
8.0
9.0
10.0

G
mm
10
10
10
10
10
10

J
Min Hole
diameter
required in
steelwork
mm
12.5
14.5
16.5
22.5
27.0
31.0

Normal Applications
Number of
turns for
metric
Torque*
Standard
Static
Normal
threads
Deflection
Nm
mm
2.5
1/3
0.4
5.5
1/4
0.4
18
1/4
0.4
22
1/4
0.5
52
1/4
0.6
56
1/4
0.6

Maximum Loads
Number of
turns for
diameter
Torque*
Standard
Static
Max
threads
Deflection
Nm
mm
4
1/2
0.6
8
1/3
0.6
27
1/3
0.6
33
1/3
0.8
79
1/3
0.9
85
1/3
0.9

* Tightening torques relate to dry, unplated, metric coarse threads.

www.farrat.com

Farrat Isolevel Ltd. Balmoral Road, Altrincham,
Cheshire WA15 8HJ. England GB
Tel: +44 (0) 161 924 1600
Fax: +44 (0) 161 924 1616 email: sales@farrat.com