Quarter Turn Stud Selection

1) Which Series Do You Require? 400 series (4mm shaft), 600 Series (6mm shaft) or 1000 series (10mm shaft)

2) Calculate The Grip Length. This is the distance from the underside of the head to the bottom of the Circlip groove (Top Face of the Clip). This is found by adding together the thickness of the Moveable Panel (dim X), the thickness of the Fixed Framework (dim Z) and the gap between the two (dim Y). If the resultant figure is not a whole number you must round up to the nearest mm IE: 12.6mm Becomes 13mm and 22.3mm Becomes 23mm.

Grip length

There are a number of factors which may also be needed to be taken into account when calculating your grip length as follows:

  1. How Do You Wish To Retain The Stud In The Panel? Neoprene Washer, Circlip or Circlip and Bowed Washer for Compression.

  2. Which Type Of Receptacle Do You Wish To Use? Clip in Clip, Tolerance Clip, Rivet Clip, Angle Bracket, Weld Plate: for more details on clips click here.

  3. There Are A Number of Additional Components which can be used in conjunction with the Oddie Stud and Clip. These must also be added to the Final Grip Length calculation. Dimensions for all these items can be found in the table below.

  400 Series 600 Series 1000 Series
Cup Washer 0.80mm 0.80mm 0.80mm
Bowed Washer 0.45mm 0.30mm 0.25mm
Angle Bracket 1.50mm 1.50mm 1.50mm
Weld Plate 1.20mm 0.90mm 0.90mm
Clearance Hole Diameter in Removable Panel 10.30mm 6.30mm 4.30mm
Clearance Hole Diameter in Framework Rivet On Clips and Weld Plate 18.00mm 12.00mm 8.50mm
  1. If a Clip in Clip Is To Be Used, An Additional Dimension Must Be Added To The Grip Length. This is the gap between the panels which is caused by the retaining legs of the Clip in Clip. However if the gap required is greater than the following sizes then no additional dimension will need to be added.

  2. 400 Series = 1.10mm
    600 Series = 2.00mm
    1000 Series = 1.8mm

Clip in grip length
  1. This Gap (dimension Q) is calculated by subtracting the thickness of the panel into which the clip fits (dimension Z) from the constant (dimension R) given in the table below.

  2. NB: the gap dimension is the minimum that is possible. If the gap between the two panels is greater than the minimum dimension you do not need to factor it into the calculation.

  3. This Gap (dimension Q) is calculated by subtracting the thickness of the panel into which the clip fits (dimension Z) from the constant (dimension R) given in the table below.

Type Panel Thickness Range (dim. z) Part No. Dimension R (Constant)
400 Series 0.5 - 0.99mm 430101 1.5mm
1.0 - 1.69mm 430102 2.0mm
1.7 - 2.4mm 430103 2.8mm
600 series 0.6 - 1.29mm 430105 1.9mm
1.3 - 2.19mm 430106 2.6mm
2.2 - 3.7mm 430107 4.2mm
1000 Series 1.2 - 1.69mm 430109 2.6mm
1.7 - 2.89mm 430110 3.5mm
2.9 - 3.7mm 430111 4.6mm
  1. Neoprene Calculation. To enable a Neoprene Washer to be correctly selected a simple calculation needs to be done.

    • Having calculated the Grip Length of the Stud you must then subtract the Moveable or Top Panel thickness from the figure. You must also subtract any Cup Washer or Bowed Washer sizes from the Grip Length.

    • Having arrived at the above figure you must then add 30% for compression.

    • If the final figure is not a whole number then round up to the nearest mm.

  2. Clip in Clip Panel Preparation. In order to fit a Clip in Clip a rectangular hole is required in the panel the clip is to be fitted to. The dimensions for this are listed below:

Clip in panel preparation
Type J K Tool Part No
400 Series 8.7 ± .01 9 ± .01 470011
600 Series 13 ± .01 12 ± .01 470012
1000 Series 20 ± .01 16.5 ± .01 470013

3) Which Head Style Do You Require? Slotted Dome, Socket Recess, Wing Head or Low Profile

Slotted Dome Head
Wing Head
Socket Recess Head
Low Profile Wing
Slotted Dome Head
(Part No - 0)
Wing Head
(Part No - 1)
Socket Recess Head
(Part No - 2)
Low Profile Wing
(Part No - 3)

4) Finally You Need To Decide Upon The Required Finish. We offer the following: Zinc & Clear, Delta Black, Chrome, Stainless Steel, and Bright Nickel.

Part Number Key

The Part Number for the Oddie Studs contains all the information you require to identify stud series, head style, grip length and finish; it is broken down as follows:

Part Number


Mulraney Components Limited
Unit 10,
Wallows Road Industrial Estate,
Brierley Hill,
West Midlands

Tel: +44 (0) 1384 881487
[email protected]

Company Reg: 13835820
VAT Reg: GB 404875293

About Oddie Quarter Turn Fasteners

"Oddie®" is the registered trade mark of Oddie Quarter Turn Fasteners and they are supplied and marketed in the UK by Mulraney Components Limited.

"An open & shut case for a specialised fastener"

The oddie fastener is a quick release, quarter turn, 1/4 turn,  fastening for securing panels or components that have to be speedily and easily removed for servicing or replacement - whether once a day, or once a year.

In its simplest form it consist of a stud, held in a removable panel by a retainer, and a spring steel clip permanently mounted to the framework of the equipment.

A quarter turn of the stud opens the fastener, and to lock it again the stud is pushed home into the clip.

Company Website

Mulraney Components Limited