PERMCO 1-5/8 X 12 STRAIGHT TAP 1-5/8-ST./TAP

Specifications

Brand Permco Inc.	Brand Permco	Pack Size 1.00	UOM EA	Supplier Part Number 1-5/8-ST./TAP	Product Weight 0.50 lbs

Product Questions & Answers 3

Product Questions & Answers

i keep seeing “1-5/8 x 12 straight tap” on the shop order, what exactly is that on this Permco part?

Question by: Terry B on Jun 6, 2025, 5:58 PM

Straight tap refers to a straight threaded tap, and the 1-5/8 x 12 callout is the thread size, 1-5/8 inch diameter with 12 threads per inch. In plain terms, it is a Permco tap made to cut that specific straight thread.

Answer by: Customer Support on Jun 8, 2025, 6:43 AM

So, this is just a tap, right? Not the whole shebang?

Question by: Dean K on Aug 15, 2025, 8:28 AM

Correct. This is just the PERMCO 1-5/8 X 12 STRAIGHT TAP.

Answer by: Customer Support on Aug 17, 2025, 6:54 AM

what exactly is a "straight tap" on a pump shaft, and is that what I need if I'm bolting up a PTO-driven setup?

Question by: Stan L on Jun 25, 2025, 7:43 PM

A straight tap shaft means the shaft end is machined with a straight (non-tapered) profile and has a tapped hole for a retaining bolt or coupling fastener, rather than using a keyed or splined connection on its own. For PTO-driven setups, straight tap configurations are pretty common when the mating coupler is bored straight and secured with a through-bolt or cap screw at the shaft end. The 1-5/8 inch diameter on this Permco shaft puts it in a range used frequently on mid-to-larger displacement gear pumps. Whether it fits your specific PTO coupler comes down to your coupler's bore size matching that 1-5/8 inch dimension and the bolt pattern or tap size lining up with your fastener.

Answer by: Customer Support on Jun 27, 2025, 6:25 AM