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T-Nuts and Screws for 25 mm, 50 mm, & 75 mm Rails


  • T-Nuts Fasten Rails to Other Mechanical Components
  • Hammerhead Screws Provide Quick-Release Mounting Stud
  • Low-Profile Screws Provide Added Clearance

SH25LP38

Low-Profile
Channel Screws

Quick-Release T-Nut
8-32 (M4 x 0.7)

Drop-In T-Nut
8-32 (M4 x 0.7)

Low-Profile T-Nut
1/4"-20 (M6 x 1.0)

Drop-In T-Nut
1/4"-20 (M6 x 1.0)

Four T-Nuts
Available

Application Idea

T-Nuts Securely Attach
Optomechanics
Using Rail Channels

LPCEF

Fastener Kit: Quick-Release T-Nuts, Setscrews, and Thumbscrews

XE25H025

Hammerhead
Screws

Related Items


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Compatible Optical Rails
25 mm Rails
50 mm Rails
75 mm Rails

Features

  • T-Nuts Fasten Rails to Other Optomechanics
  • Four T-Nut Choices (See Image Above)
  • Hammerhead Screws Provide Studs for Direct Mounting
  • Low-Profile Channel Screws with Smaller Footprint than Standard Cap Screws

Thorlabs' T-nuts, hammerhead screws, and low-profile channel screws are designed to link 25 mm, 50 mm, and 75 mm rails to other optomechanical components.

T-Nuts
T-nuts effectively add 8-32 (M4 x 0.7) or 1/4"-20 (M6 x 1.0) tapped holes to the rail sides, permitting a wide range of standard optomechanics to be fastened to the rails. Our T-nuts are available in three styles—Quick-Release, Drop-In, and Low-Profile—which are detailed in the text below.

Low-Profile Channel Screws

Low-Profile Channel Screws in 25 mm Corner Cube

Hammerhead Screws
These screws add 1/4"-20 (M6 x 1.0) studs to optical rails and incorporate a quick-release T-head for direct insertion into a rail slot.

Low-Profile Channel Screws
Low-profile channel screws feature a shortened cap height and conserve space within a setup by allowing the optomechanical components that they attach to be more compact. For example, in our construction cubes, they allow several screws to be in close proximity, as shown to the left.


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Drop-In T-Nuts for XE Series Rails

Drop-In T-Nut Insertion and Removal
XE25T2 in Rail Channel
Click for Details

Drop-In T-Nut in Rail Channel
  • Can Be Dropped into Any Exposed Portion of a Rail Channel Without Accessing the Ends
  • Removal Requires Access to the Rail Ends
  • 8-32 (M4 x 0.7) Tapped Hole or 1/4"-20 (M6 x 1.0) Tapped Hole for Mounting

Drop-in T-nuts can be dropped in along any point of an exposed rail channel, making them easy to install even if the rail ends are blocked. They are available with either an 8-32 (M4 x 0.7) tapped hole [Item # XE25T2(/M)] or 1/4"-20 (M6 x 1.0) tapped hole [Item # XE25T1(/M)].

Although these T-nuts can be easily inserted anywhere along the rail, access to the end of the rail is necessary for removal. This procedure is shown in the animation to the right. In contrast, our quick-release T-nuts, shown above, offer the added flexibility of being able to be removed when the rail ends are obstructed.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XE25T2 Support Documentation
XE25T2Drop-In T-Nut, 8-32 Tapped Hole, 10 Pack
$31.12
Today
XE25T1 Support Documentation
XE25T1Drop-In T-Nut, 1/4"-20 Tapped Hole, 10 Pack
$31.12
Today
+1 Qty Docs Part Number - Metric Price Available
XE25T2/M Support Documentation
XE25T2/MDrop-In T-Nut, M4 x 0.7 Tapped Hole, 10 Pack
$31.12
Today
XE25T1/M Support Documentation
XE25T1/MDrop-In T-Nut, M6 x 1.0 Tapped Hole, 10 Pack
$31.12
5-8 Days

Quick-Release T-Nuts for XE Series Rails

Quick-Release T-Nut Insertion and Removal
XE25T4 in Rail Channel
Click for Details

Quick-Release T-Nut in Rail Channel
  • Can Be Inserted and Removed from Any Exposed Rail Channel Without Accessing the Ends (See Animation to the Right)
  • Drops into Position and Locks by Rotating
  • More Surface Engagement than Drop-In and Low-Profile T-Nuts
  • 8-32 (M4 x 0.7) Tapped Hole for Mounting

The XE25T4(/M) Quick-Release T-Nut is our most versatile option for mounting mechanics to rail channels. Its thin width profile allows it to be inserted into an exposed rail channel. After being inserted, a clockwise rotation by 90° prevents it from being removed again. Once rotated, screwing in a mechanical part draws the T-nut towards the part, eventually forcing the T-nut and rail channel to engage. The protruding edge of the 8-32 (M4 x 0.7) tapped hole centers the T-nut within the rail channel, ensuring even engagement on both sides.

To remove the quick-release T-nut, simply remove any attached mechanical parts and rotate the T-nut counterclockwise.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XE25T4 Support Documentation
XE25T4Self-Centering Quick-Release T-Nut, 8-32 Tapped Hole, 10 Pack
$25.43
Today
+1 Qty Docs Part Number - Metric Price Available
XE25T4/M Support Documentation
XE25T4/MSelf-Centering Quick-Release T-Nut, M4 x 0.7 Tapped Hole, 10 Pack
$25.43
Today

Low-Profile T-Nuts for XE and XT66 Series Rails

Low-Profile T-Nut Insertion and Removal
XE25T2 in Rail Channel
Click for Details

Low-Profile T-Nut in Rail Channel
  • Can Only Be Inserted and Removed from the End of a Rail
  • 1/4"-20 (M6 x 1.0) Tapped Hole for Mounting
  • Economical Alternative to Drop-In and Quick-Release T-Nuts

The XE25T3(/M) Low-Profile T-Nut can be used when there is access to an XE Series rail end, which allows the T-nut to slip into place. Since installation (and removal) requires the rail end to be unobstructed, as shown in the animation to the right, this T-nut usually needs to be positioned before a mechanical construction is completed. Our quick-release and drop-in T-nuts, shown above, can be inserted even if the rail ends are blocked; the former can also be removed without access to the ends.

This T-nut is also compatible with our XT66 Series rail system mounting platforms.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XE25T3 Support Documentation
XE25T3Low-Profile T-Nut, 1/4"-20 Tapped Hole, 10 Pack
$10.61
Today
+1 Qty Docs Part Number - Metric Price Available
XE25T3/M Support Documentation
XE25T3/MLow-Profile T-Nut, M6 x 1.0 Tapped Hole, 10 Pack
$10.61
Today

Hammerhead Screws for XE Series Rails

  • Can Be Inserted and Removed from Any Exposed Rail Channel Without Accessing the Ends
  • Drops into Position and Locks by Rotating
  • 1/2" (12.7 mm) Long, 1/4"-20 (M6 x 1.0) Threaded Stud for Mounting

These quick-release hammerhead screws are versatile options for mounting mechanics to rail channels. Their thin width profile allows them to be inserted into an exposed rail channel. After being inserted, rotating the screw clockwise by 90° prevents it from being removed again. Once rotated, screwing on a mechanical part draws the hammerhead screw towards the part, eventually forcing the screw and rail channel to engage.

To remove the hammerhead screw, simply remove any attached mechanical parts and rotate the screw counterclockwise.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
XE25H025 Support Documentation
XE25H0251/4"-20 Hammerhead Screw, 1/2" Long, 10 Pack
$17.19
Today
+1 Qty Docs Part Number - Metric Price Available
XE25HM6 Support Documentation
XE25HM6M6 x 1.0 Hammerhead Screw, 12.7 mm Long, 10 Pack
$17.19
Today

Low-Profile Channel Screws

Item # Threading Thread Length Hex Head Height Quantity Material
SH25LP38 1/4"-20 0.38" (9.7 mm) 1/8" 0.13" (3.2 mm) 100 Steel,
Black
Oxide
Finish
SH25LP63 0.63" (15.9 mm) 50
SH6M8LP M6 x 1.0 8 mm (0.31") 4 mm 4 mm (0.16") 50
SH6M10LP 10 mm (0.39") 100
SH6M16LP 16 mm (0.63") 50
Low-Profile Channel Screw
Click to Enlarge

Low-Profile Screw in RM1G Construction Cube
Standard Cap Screw
Click to Enlarge

Standard Cap Screw in RM1G Construction Cube

Our Low-Profile Channel Screws have a reduced cap head height relative to standard screws, permitting them to be used in tight spaces. In particular, they are recommended when neighboring screws are at a right angle and in close proximity, as in our XE25W3 Corner Cube or RM1G and RM1S Construction Cubes.

Shown to the right are a standard cap screw and a low-profile channel screw installed in an RM1G cube. The low-profile screw's shortened cap height prevents neighboring screws from interfering with each other.

The head of each screw also fits into XE rail channels for alternate construction methods, as outlined here.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SH25LP38 Support Documentation
SH25LP381/4"-20 Low-Profile Channel Screw, 3/8" Long, 100 Pack
$25.10
Today
SH25LP63 Support Documentation
SH25LP631/4"-20 Low-Profile Channel Screw, 5/8" Long, 50 Pack
$20.06
Lead Time
+1 Qty Docs Part Number - Metric Price Available
SH6M8LP Support Documentation
SH6M8LPM6 x 1.0 Low-Profile Channel Screw, 8 mm Long, 50 Pack
$16.77
Lead Time
SH6M10LP Support Documentation
SH6M10LPM6 x 1.0 Low-Profile Channel Screw, 10 mm Long, 100 Pack
$25.10
Today
SH6M16LP Support Documentation
SH6M16LPM6 x 1.0 Low-Profile Channel Screw, 16 mm Long, 50 Pack
$20.06
Today

Fasteners for Laser Safety Fabric Panels

Laser Safety Curtain Panel
Click to Enlarge
Click for Assembly Demonstration
View Imperial Product List
Item #QtyDescription
LPCE211Laser Safety Fabric Panel for 21" x 12" Enclosure Side
XE25C9121" x 15" x 12" (L x W x H) Enclosure with Black Hardboard Panels
MB18241Aluminum Breadboard, 18" x 24" x 1/2", 1/4"-20 Taps
LPCEF1Fastener Kit for Laser Safety Fabric Panels, 8-32 Threading
View Metric Product List
Item #QtyDescription
LPCE525/M1Laser Safety Fabric Panel for 525 x 300 mm Enclosure Side
XE25C9/M1525 mm x 375 mm x 300 mm (L x W x H) Enclosure with Black Hardboard Panels
MB4560/M1Aluminum Breadboard, 450 mm x 600 mm x 12.7 mm, M6 Taps
LPCEF/M1Fastener Kit for Laser Safety Fabric Panels, M4 Threading
LPCE21 Panel Attached to Optical Enclosure using LCPEF Fastener Kit. The thumbscrews can be easily removed in order to access the inside of the enclosure.
  • Attach Laser Safety Fabric Panels to 25 mm Rail Channels
  • Each LPCEF(/M) Kit Includes:
    • Seven 8-32 (M4 x 0.7) Thumbscrews
    • Seven 8-32 (M4 x 0.7) T-Nuts
    • Seven 8-32 (M4 x 0.7) Setscrews
  • Replacement 8-32 (M4 x 0.7) Thumbscrews Available [Item # LPCET(/M)]

The LPCEF(/M) fastener kit contains seven sets of thumbscrews, T-nuts, and setscrews. One fastener kit is enough to affix one laser safety fabric panel to the side of a compatible enclosure. Please see the manual for instructions.

The setscrews can be tightened using a 5/64" (2.0 mm) hex key or balldriver, while the thumbscrews do not have a hex socket.

Replacement thumbscrews for the fastener kit are also available in packs of 10.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
LPCEF Support Documentation
LPCEFFastener Kit for Laser Safety Fabric Panels, 8-32 Threading
$42.00
Lead Time
LPCET Support Documentation
LPCET8-32 Thumbscrews, Qty. 10
$14.60
Today
+1 Qty Docs Part Number - Metric Price Available
LPCEF/M Support Documentation
LPCEF/MFastener Kit for Laser Safety Fabric Panels, M4 Threading
$42.00
Today
LPCET/M Support Documentation
LPCET/MM4 Thumbscrews, Qty. 10
$14.60
Today
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