NBI Na Bob Precision Metal Industry Limited
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As a manufacturer of precision stamped metal parts, we also specialise in the manufacture of metal snap dome contacts for use with electric circuitboards, most commonly used today in mobile telephone handsets. With over 17 years experience in this field we have built a large catalogue of over 200 readily available domes which require no need for any tooling, and are available at very short notice.

Our domes are currently being used all over the world, in many applications ranging from mobile phones, personal electronic apparatus to disposable cameras.

Circle type
Triangle type
Cross type
Square type
Oblong type

Legged

Custom order

P/N key
letters after
prefix : -

T : triangular
S : square
C : circular
B : oblong
L : legged

example.

5A-T
diameter 5mm - triangular

NEW P/N

HEIGHT
TENSION
THICKNESS
LEG DIAMETER
6F-F
0.32+0.02
140+25g
0.06mm
6K-F
0.52+0.03
225+30g
0.06mm
7R-F
0.53+0.03
320+30g
0.08mm
7U-F
0.53+0.03
175+25g
0.08mm
7V-F 0.31+0.03 85+30g 0.06mm  
7W-F 0.35+0.03 110+25g 0.06mm  
7.9A-F
0.51+0.02
160+25g
0.06mm
7.9B-F 0.50+0.03 230+30g 0.07mm  
8.5A-F
0.53+0.02
250+30g
0.08mm
8.5B-F
0.71+0.02
260+25g
0.06mm
8.5C-F
0.80+0.02
370+30g
0.08mm
8.5D-F
0.50+0.02
180+30g
0.08mm
8.5E-F
0.54+0.02
260+30g
0.08mm
8.5G-F
0.55+0.03
180+30g
0.06mm
9.2B-F
0.54+0.02
210+25g
0.06mm
9.2C-F
0.50+0.02
290+25g
0.08mm
10M-F
0.75+0.02
350+30g
0.10mm
10N-F
0.75+0.02
260+30g
0.08mm
10O-F
0.68+0.03
180+30g
0.08mm
10Q-F
0.80+0.03
350+30g
0.08mm
11.5B-F
0.80+0.02
410+30g
0.10mm
11.5C-F
0.75+0.02
340+30g
0.10mm
12A-F
0.80+0.02
375+25g
0.10mm
12F-F
0.65+0.02
175+25g
0.08mm
12J-F
0.73+0.03
270+25g
0.10mm
12K-F
0.80+0.02
280+30g
0.10mm
12M-F
0.98+0.03
600+30g
0.12mm
12N-F
0.80+0.03
330+30g
0.10mm
12P-F
0.65+0.03
280+30g
0.10mm
12Q-F
0.80+0.03
350+30g
0.10mm
12S-F 0.72+0.03 310+30g 0.10mm  
12.1A-F 0.60+0.03 300+30g 0.10mm  
12.25A-F
0.75+0.02
225+25g
0.08mm
12.25B-F
0.80+0.03
200+25g
0.08mm
12.25C-F
0.75+0.03
120+20g
0.08mm
12.3A-F
0.80+0.03
340+30g
0.10mm
14.5A-F
0.74+0.02
320+30g
0.10mm
14.5B-F
0.78+0.03
400+30g
0.10mm
14.5C-F
0.88+0.03
490+30g
0.10mm
18.75A-F
0.73+0.03
290+30g
0.10mm
18.75B-F
0.94+0.03
500+30g
0.10mm
18.75C-F
0.87+0.03
400+30g
0.10mm
18.75D-F
0.86+0.03
340+30g
0.10mm
20A-F
1.30+0.02
525+25g
0.12mm
20B-F
1.32+0.02
500+25g
0.12mm
 
20C-F 1.63+0.05 2200+20g 0.20mm
All our metal domes are produced using high quality Japanese stainless steel JIS spec SUS 301/ SUS 304.
Na Bob is an ISO 9001:2000 registered company