NP
Contact us You can contact us using any of the methods below. Unit 3 Durham Lane Armthorpe Doncaster South Yorkshire DN3 3FE England +44 (0)1302 836010 +44 (0)1302 836012 sales@npfasteners.com
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NORTHERN PRECISION LTD
Accreditations Northern Precision Ltd operate a quality management system in accordance with ISO 9001:2008. The ISO 9001:2008 standard is recognised worldwide and you can be assured of the benefits of working with a certified company knowing that our management systems are constantly assessed and improved.
Registered in England & Wales Company number 3275391
V.A.T Registration number GB 684 1384 17
NP
NORTHERN PRECISION LTD
Specialist Fasteners for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 836012
Tel:
Fax:
sales@npfasteners.com
Quality
Service
Reliability
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Installation Method
Punch or drill specified hole size. Ensure that you are using the correct gauge fastener for the panel thickness used. Place part in anvil and locate panel hole over spigot.
Using a profiled punch, ensuring panel is held perpendicular to the punch and anvil face, apply a parallel squeezing force to form the correct spigot profile.
Alternatively, a domed anvil or a ball bearing and hammer can be used to form the spigot profile, however this will not give optimum performance.
For optimum performance, installing with a profiled punch is highly recommended. A flat punch can also be used but will result in reduced push-out performance. 
Thread size
Torque to Turn (Nm)
Push-Out (N)
20swg
18swg
16swg
14swg
12swg
10swg
20swg
18swg
16swg
14swg
12swg
10swg
M2.5
M3
M3.5
M4
M5
M6
M8
1.0
1.0
2.2
2.2
4.7
6.2
7.6
1.3
1.3
2.6
2.6
5.1
6.5
8.2
1.6
1.6
3.3
3.3
5.4
6.9
8.6
2.0
2.0
3.7
3.7
5.7
7.5
9.1
2.3
2.3
4.2
4.2
6.0
7.9
9.8
2.5
2.5
4.5
4.5
6.5
8.5
10.7
900
900
1000
1000
1050
1150
1350
1050
1050
1150
1150
1300
1450
1800
1200
1200
1300
1300
1500
1700
2400
1300
1300
1450
1450
1700
2100
2700
1500
1500
1600
1600
1850
2400
2950
1600
1600
1700
1700
2000
2650
3200
Performance
All performance figures are averages obtained over a range of installations for steel parts in mild steel panels and should be used for guidance only. Fastener material, panel material, hole preparation, installation tooling and method can affect part performance. Actual in-use torque to turn resistance increases with clamping load. We always recommend that you carry out your own tests in the actual application. Please call our sales team and we will be happy to provide you with samples as well as offering technical assistance.
PROFILED PUNCH ANVIL PUNCH OR HAMMER ANVIL PUNCH OR HAMMER PROFILED PUNCH ANVIL ANVIL
Material & Finish
Unplated Steel (GX) Electro Zinc Plated Steel (GZ) 303 Stainless Steel (GS) 316 Stainless Steel (A4) Aluminium (GA) Brass (GB)
Part Number Examples
Part number is made up as follows: (Type)-(Thread code)-(Panel thickness)-(Material/Finish code) For example: BMHK-M4-18-GZ (Mini Rivet Bush Knurled Spigot-M4-18swg sheet thickness- electro zinc plated steel) BMHK-M5-20-GS (Mini Rivet Bush Knurled Spigot-M5-20swg sheet thickness- stainless steel)
RoHS REACH COMPLIANT
Dimensional
Panel thickness ranges shown are preferred range. Other sizes are subject to availability or special order.  Thread Size M2.5 x 0.45 M3 x 0.5 M3.5 x 0.6 M4 x 0.7 M5 x 0.8 M6 x 1.0 M8 x 1.25 M10 x 1.5 M12 x 1.75 To suit panel thickness 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) 20 - 10swg (1.0 - 3.0mm) Hole Size +0.05 -0.0 4.19 4.19 5.41 5.41 6.40 7.70 9.70 12.70 15.87 D 0.15 5.50 5.50 7.00 7.00 8.50 10.00 12.00 16.00 19.00 H 0.13 2.80 2.80 3.20 3.20 3.80 5.10 6.50 7.60 10.20 C +0.0 -0.13 4.19 4.19 5.41 5.41 6.40 7.70 9.70 12.70 15.87 M2 x 0.4 20 - 10swg (1.0 - 3.0mm) 3.50 5.00 2.30 3.50
Info
Mini Rivet Bushes provide strong reusable captivated threads in panels too thin to be conventionally tapped.   They can be installed into panels as thin as 0.5mm and do not suffer from the maximum hardness or centreline to edge limitations of self-clinching nuts so are suitable for installation into panels of any hardness such as hard stainless steels or in close to edge applications. Featuring a knurled spigot,this style of smaller rivet bush offers good torque to turn resistance while maintaining good spigot strength to resist push-out. Manufactured to suit a specific panel thickness, we can manufacture parts with custom dimensions to suit your particular application.   Available from stock in metric thread sizes in steel, electro zinc plated steel and stainless steel. We can also supply Unified, BA, BSW and BSP thread sizes subject to minimum order quantities. 316 stainless steel, aluminium and brass rivet bushes are available to order subject to minimum order quantities. Ideally Rivet Bushes should be installed using a press with a suitability profiled punch by applying a parallel squeezing force, however they can be installed using a hammer and ball bearing to form the spigot profile.
Mini Rivet Bushes Knurled Spigot
MINI RIVET BUSH KNURLED SPIGOT
mini rivet bush knurled spigot