GN 653.2 Flat Knurled Thumb Screws Steel, with Recessed Stud for Loss Protection


GN 653.2 Steel Flat Knurled Thumb Screws, with Recessed Stud for Loss Protection

Product description


GN 653.2 thumb screws can be used to prevent loss of the thumb screw, due to the d4 recessed portion of the stud.

When using, instead of a typical tapped and bored hole, it is necessary to provide tapped bores with a thread d1 on each of the two elements to be assembled. Additionally, a clearance bore of d5 on one or both sides must be cut.

Depending on the design and required clamping length a1 - a3 of the component being attached, there are a number of assembly options as shown below.


Knurled thumb screw body
  • SteelST
  • Tensile strength class 5 (500 N/mm²)
  • visible face fine turned
  • black oxide finish

RoHS compliant

Technical drawing

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GN 653.2 Steel Flat Knurled Thumb Screws, with Recessed Stud for Loss Protection sketch

Part Options / Table

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Dimensions in: Inch | Metric
l1a1a2a3d2d3d4 -0.008d5hkl2l3
M 4.592-44-88-
M 4.674-66-1010-
M 4.756-88-1212-
M 4.838-1010-1414-
M 5.712,5-44-10,510,5-
M 5.794-66-1212-
M 5.876-88-1414-
M 51.028-1212-1616-
M 6.943-66-1313-
M 61.026-88-1616-
M 61.188-1212-1818-
M 61.3412-1616-2222-
M 81.184-88-1616-
M 81.348-1212-2020-
M 81.5012-1616-2424-
M 81.6516-2020-2828-321.

Build & Price

Thread d1

Selected Part

Total USD (net)
In stock: 0
Call / Email for Delivery Time
Please note our quantity discounts (USD).
≥ 500$1.44
Weight: 0.153 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
RoHS compliant: -
This part is new in our product range, no details are available at this time. For more recent details on the RoHS compatibility, please contact our Sales Department!
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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