The part number 523-D4 is a tab.

Smart block pins can offer an alternative very close to 523-D4 : SBP-RT.

The difference between 523-D4 and SBP-RT is the hole diameters.

You can also have the tab already installed with the lanyards.

Please see below some examples:

With the ball lock pins, you can also add a lanyards or a flags.

The lanyards can be custom made with your length and tabs.

Smart Block Pin can also suggest alternatives from other manufacturer.

If you search the part number LBA-E1D3L250 or E1D3L250, the alternative is SBPL250ETET.

SBPL250ETET is a lanyard with 2 eyelets tabs and a length of 250mm.

Question from a customer:

Do you have a more detailed drawing of lock pins, because I am not so sure how we can integrate it in our project.

Lock pins operate in this way:

1) Ball lock pin in locking position that locks two plates A and B:

Yes. Smart block pin can supply an alternative to the old 903DC parts, these parts are made with stainless steel and are double acting L handles.

You can also find all the 903DC parts here.
A few examples of the old part numbers and the newer SBP part number:

Yes, we have an alternative for the 903D Quick Release Pins.

These pins are Double Acting L Handles, they are made out of steel, we have standardized stainless steel.

Our alternatives primarily use Stainless Steel 1.4542 also known as 17/4 PH or 630.

You can find our full list here.

A few examples:

Answer:

MIL-P-45952 is the classification of heavy duty Detent Pins.

This is the timeline of the detent pins Military Specification:

Answer:

29 June 2000 – QPL-23460-19 was cancelled by Notice 1.

On the same day MIL-P-23460E (the spec that required the QPL) was cancelled and superseded by NASM 23460.

• Because the spec moved from the DoD to the Aerospace Industries Association (AIA), the U.S. military no longer keeps an active QPL for these pins; any legacy QPL data were archived and the qualification function migrated to:

MIL-P-23460 covers positive-locking, self-retaining pins that use spring-loaded balls to hold the shank in double shear.
It divides the family into two functional types:

Answer:

Before NASM certification the MS certification was used, in the table below you can find all the new classifications:

The difference in these ball lock pins has everything to do with the standard that they have too meet.

1. Who owns the standard — and why that matters