Genuine Bosch hex-socket cap screw — part no. 1619P05408. This original Bosch fastener is a hex (Allen) socket-head cap screw used inside reciprocating saw assemblies; it replaces the specific cap/hex-socket bolt that secures internal brackets and housings on the GSA 1100 E series.

Key details:

- Type: hex (Allen) socket-head cap screw (low-profile cap head for confined spaces).

- Construction: hard steel fastener manufactured to Bosch specification for correct thread form and head geometry (designed to resist vibration loosening when torqued to spec).

- Pack/quantity: sold as a single replacement screw (match against the part number on your parts list).

- Alternate formatting: the same part is sometimes listed as 1 619 P05 408 or 1.619.P05.408.

Example fitment:

- Bosch GSA 1100 E reciprocating saw (GSA1100E / product order numbers shown on Bosch professional pages).

If your parts diagram or the ten‑digit number on the tool matches 1619P05408, this genuine Bosch screw is a direct like‑for‑like replacement to restore correct fit and fastening integrity during reassembly.