Skip to the beginning of the images gallery

PERMCO CAP SCREW/HEX

Description & Features

A genuine Permco replacement fastener, this hex cap screw is a direct-fit component designed for use in Permco hydraulic gear pump and motor assemblies. Hex cap screws of this type secure pump housings, end plates, and related components, making them a routine service and rebuild part for hydraulic systems using Permco equipment.

Sourced directly from Permco, this fastener maintains OEM fit and thread specification, which is important when servicing assemblies where dimensional consistency affects sealing and structural integrity.

SKU: W1-58

Supplier Part Number (MPN): W1-58

Alternate Part Numbers: C1DS65

Specifications

Alternate Part Numbers Alternate Part Number C1DS65	Brand Permco Inc.	Brand Permco	Pack Size 1.00	UOM EA	Supplier Part Number W1-58	Product Weight 0.43 lbs

Product Questions & Answers (1)

Question by: Rod M on Feb 19, 2026, 12:55 PM

Is this the actual OEM fastener or one of them aftermarket knockoffs that never quite fits right?

Answer by: Customer Support on Feb 21, 2026, 9:45 AM

Genuine Permco part, sourced directly from Permco. The SKU W1-58 matches their OEM specification, so thread pitch and dimensions are going to be exactly what the original assembly calls for. That matters on gear pump and motor housings where a slightly off fastener can mess with sealing and clamping force.