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Captive Nuts

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Captive nuts (or as they are more correctly named, 'tee nuts') have a range of uses but are more commonly used in
the RC hobby field for engine fixing (securing engine mounts to the firewall), wing fixings, and undercarriage fixing.
Also widely used in many general woodworking projects where a hard thread is required that will not pull out.

We stock a range of Metric, UNC and UNF sizes (scroll down for UNC and UNF)

All our Tee nuts are Bright Zinc Plated

To order, click on the 'Add to Order' button alongside the item of your choice. You can select the quantity on the order form (default is 1). To continue ordering other items, use the 'Back' button on your browser or the 'continue shopping' button on the order page - the order form will retain the information until you are ready to submit your order.
You can review and edit your order, or submit your order at any time by using the button at the bottom of each list.

All prices include 20% VAT  Click here for details

Captive (Tee) Nuts 

Metric Threads 

Thread No of Prongs Flange Dia (mm) O/All Length (mm) Barrel

MF Ref

Pack Qty Pack Price You can enter/change the number of items on the order form
M3 4 13 5 4 MF-CN01/10 10 £1.80

MF-CN01/100 100 £16.20

M4 4 15 6 5.5 MF-CN02/10 10 £1.60

MF-CN02/100 100 £14.40

M5 4 17 8 6.2 MF-CN03/10 10 £1.60

MF-CN03/100 100 £14.40

M6 4 19 9 7.7 MF-CN04/10 10 £1.70

MF-CN04/100 100 £15.30

M8 4 22 11 9.4 MF-CN05/10 10 £1.95

MF-CN05/100 100 £17.55

Dimensions are approximate and may vary due to manufacturing tolerances


Looking for M2 tee nuts ? - 2UNC (listed below) make a great miniature alternative when used with matching 2 unc (2-56) screws.
We stock 2 UNC nylon binder head screws as well as 2UNC steel and stainless steel cap head screws, button heads, and countersunks.

Captive (Tee) Nuts 

UNC and UNF Threads

For thread data click here

Thread No of Prongs Flange Dia (mm) O/All Length (mm) Barrel

MF Ref

Pack Qty Pack Price You can enter/change the number of items on the order form
2-56 (UNC) 3 6.8 3.8 3 MF-CN20/10 5 £1.95

4-40 (UNC) 3 9 3.8 3.5 MF-CN22/10 5 £1.60

6-32 (UNC) 4 12.7 5.4 4.2 MF-CN24/10 5 £1.35

8-32 (UNC) 3 12.7 7.2 5.6 MF-CN26/10 5 £1.50

10-24 (UNC) 3 18 9.1 6.2 MF-CN28/10 5 £1.50

  Sorry - this item is temporarily out of stock  
10-32 (UNF) 3 18 9.1 6.2 MF-CN30/10 5 £1.50

1/4-20 (UNC) 3 19 9.1 7.6 MF-CN32/5 5 £1.50



  Links to matching UNC Steel and Stainless Steel screws:


Steel UNC Cap Screws

Stainless Steel UNC Cap Screws
  Steel UNC Button Head Screws Stainless Steel UNC Button Head Screws
  Steel UNC Countersunk Screws Stainless Steel UNC Counterunks Screws

Links to various styles in Nylon with UNC thread:


  Binder Head
Hex Heads
Socket Cap


  Other related items (click on pictures)
  Cap Screws Flat Washers Spring Washers
    Nylon Screws Steel Screws  
  Lost the captive nut in the fus again ? - Our magnetic tipped extendable 'pen' is great for fishing out small steel fasteners from hard-to-reach places.

This page was last modified on : March 14, 2024

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