In plain English
FAR 52.247-4, Inspection of Shipping and Receiving Facilities, is a contract clause prescribed at FAR 47.207-1(c), most recently dated Apr 1984. The complete official text is reproduced below, verbatim, from GSA's published FAR source files.
Its text contains no sentence requiring insertion into subcontracts; see the flowdown section below for what that does and does not mean.
Does it flow down to subcontracts?
No flowdown mandate found in the clause text
We scanned the full clause text and found no sentence directing the contractor to insert this clause into subcontracts. That is a statement about the text, not legal advice: a prime contractor may still flow terms down contractually, an agency supplement (DFARS, VAAR, …) may add requirements, and clauses listed below (if any) may order this clause into subcontracts from the outside.
Where it's prescribed
As prescribed in 47.207-1(c), insert the following provision in solicitations for transportation or for transportation-related services when it is desired for offerors to inspect the shipping, receiving, or other sites to ensure realistic bids:
Prescribing reference: FAR 47.207-1(c).
The official text, verbatim
As prescribed in 47.207-1(c), insert the following provision in solicitations for transportation or for transportation-related services when it is desired for offerors to inspect the shipping, receiving, or other sites to ensure realistic bids:
Inspection of Shipping and Receiving Facilities (Apr 1984)
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(a) Offerors are urged to inspect the shipping and receiving facilities where services are to be performed and to satisfy themselves regarding all general and local conditions that may affect the cost of contract performance.
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(b) Site visits have been scheduled as follows:
__________________________________________________ (Locations)
__________________________________________________ (Dates)
__________________________________________________ (Times)
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(c) For further information offerors may contact:
__________________________________________________ (Name)
__________________________________________________ (Telephone)
(End of clause)