PANCHSHEEL FASTENERS PVT. LTD.
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Product Description
Our provided HSS Washer is sturdy in structure, compact in size and anti corrosive in nature. In order to fulfill the need customer�s choices, this washer is available in customer�s sizes, dimensions, finishes and other specifications. Also, it is highly reckoned among clients due to its uniform thickness, high endurance and dimensional accuracy. To ensure excellent strength and defect-free nature, our provided HSS Washer is fabricated using high-grade stainless steel, metal and other hard materials with the aid of latest techniques based molding machines.
Key features:
- Ideal for distributing the load of a threaded fastener
- Comes in round shape
- Fine finish
HSS Washer
Table 5 : Panchsheel Fasteners High Strength Structural Washers – Dimensions
|
Bolt Size |
M16 |
M20 |
(M22) |
M24 |
(M27) |
M30 |
M36 |
|
|
d |
Min. |
18.00 |
22.00 |
24.00 |
26.00 |
30.00 |
33.00 |
39.00 |
|
Max. |
18.43 |
22.52 |
24.52 |
26.52 |
30.52 |
33.62 |
39.62 |
|
|
D |
Max. |
34.00 |
42.00 |
44.00 |
50.00 |
56.00 |
60.00 |
72.00 |
|
H |
Min. |
32.40 |
40.40 |
42.40 |
48.40 |
54.10 |
58.10 |
70.10 |
|
Max. |
4.60 |
4.60 |
4.60 |
4.60 |
4.60 |
4.60 |
4.60 |
|
|
|
Min. |
3.10 |
3.10 |
3.40 |
3.40 |
3.40 |
3.40 |
3.40 |
|
Weight Kg/1000pcs |
20.3 |
31.3 |
33.2 |
44.7 |
54.8 |
61.4 |
89.7 |
|
Table 6 : Mechanical Properties of H.S.S. Bolts
|
Thread Size |
Stress Area |
Property Class 8.8 |
Property Class 10.9 |
||||
|
Ultimate Load (min) |
Proof Load (min) |
Hardness |
Ultimate Load (min) |
Proof Load (min) |
Hardness |
||
|
Mm2 |
Newtons |
Newtons |
HRC |
Newtons |
Newtons |
HRC |
|
|
M16 |
157 |
125600 |
91060 |
22 – 32 |
163280 |
130310 |
32 – 39 |
|
M20 |
245 |
203350 |
147000 |
23 – 34 |
254800 |
203350 |
|
|
(M22) |
303 |
251490 |
181800 |
315120 |
251490 |
||
|
M24 |
353 |
292990 |
211800 |
367120 |
262990 |
||
|
(M27) |
459 |
380970 |
275400 |
477360 |
380970 |
||
|
M30 |
561 |
465630 |
336600 |
583440 |
465630 |
||
|
M36 |
817 |
678110 |
490200 |
849680 |
678110 |
||
Table 7 : Mechanical Properties of H.S.S. Nuts
|
|
Property Class 8 |
Property Class 10 |
||
|
Thread Size |
Proof Load Newtons |
Hardness |
Proof Load Newtons |
Hardness |
|
M16 |
168900 |
HRB 89 to HRC 38 |
195500 |
HRC 26 to HRC 38 |
|
M20 |
263400 |
305000 |
||
|
(M22) |
325700 |
377200 |
||
|
M24 |
379500 |
439500 |
||
|
(M27) |
493400 |
571500 |
||
|
M30 |
603100 |
698400 |
||
|
M36 |
878300 |
1017200 |
||
Determining the Slip Factor:
The friction grip joint depends for its performance on tightening of bolts to high preload so that the adjoining members are brought into contact and the shear load transmitted by friction between them.
The resistance to Slip (P) is expressed by P=µ x T
Where µ is the experimentally determined Slip factor and T is the initial Bolt preload.
(Ref. Fig. 1) it is desirable that before designing a structural joint, a series of slip factor tests are carried out to determine the actual Slip factor, Creating contact surface conditions similar to be used at site.
Table 9 gives Slip factor values for various contact surfaces.
Table 9 : Slip factor Values for Various contact surfaces
|
Surface Condition |
Average Slip Factor |
|
Untreated tight mill scale |
0.45 |
|
Grit Blast Surface |
0.50 – 0.55 |
|
Hot Dip Galvanised |
0.21 – 0.35 |
|
Hot Dip Galvanised + Wire Brush |
0.35 |
|
Hot Dip Galvanised + Sand Blast |
0.40 – 0.45 |
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