Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

What does "HR screw HM20" mean?

November 1, 2012

Q. I have a requirement for the following HR screw HM20 length 80mm, zinc plated, can you tell me what the HR and HM stand for please?

Richie Gordon
- Singapore

March 1, 2013

A. I think you will find this refers to a British Standard for pre-stressed bolts "HR" and that the bolts are to be hot-manufactured and 20 mm dia.

Kent Backus
Fort Worth, Texas, USA

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: