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Distributor's Link Magazine Fall 2019 / Vol 42 No4

44 THE DISTRIBUTOR’S

44 THE DISTRIBUTOR’S LINK Larry Borowski President GREENSLADE & COMPANY INC. 2234 Wenneca Avenue, Fort Worth, TX 76102 TEL 817-870-8888 FAX 817-870-9199 EMAIL sales1@greensladeandcompany.com WEB www.greensladeandcompany.com SQUARE SOCKET RECESS WOBBLE INSPECTION A Brief History of the Square Recess The square socket recess was developed in the early part of the 1900’s by the P.L. Robertson Screw Company of Canada and for many years was the dominant recess design in Canada. Years later, the square recess was adopted heavily in the United States in the furniture and recreational vehicle industries. The square recess and its variations (combination with cruciform recesses and/or slots) has since been adopted in a variety of additional industries largely because the square socket recess provides a very stable fit between the driver bit and the screw recess. This stability between the driver bit and screw recess is a great benefit in driving screws which drill or pierce their own holes in mating parts. This is mostly due to the slight taper of the recess walls. Types of fasteners that benefit from this design include self drilling screws, self piercing screws, wood screws, and similar products. The successful performance of this fastener drive system is largely dependant on the tight fit between the driver bit and the screw recess. The benefits of this design are lost if excessive wobble is present at the system interface of the driver to the recess. The quality of this aspect of the recess can be effectively inspected by use of the wobble gaging system. The wobble gaging point is also slightly tapered to mimic the form of the recess to better evaluate its performance. TECHNICAL ARTICLE Square Recesses Are Covered By ASME Standards As Type III Recesses Due to the broadening use of the square socket recess in the United States, the American Society of Mechanical Engineers (ASME) gave it the designation of Type III recess. ASME first incorporated the recess design in its B18.6.5M, Metric Tapping Screw Standard, and B18.6.7M, Metric Machine Screw Standard. Unfortunately, these standards did not provide limits for acceptable wobble in these recesses. CONTINUED ON PAGE 122

3Q INC. CONTINUING TRADITIONS AT 3Q INC. THE DISTRIBUTOR’S LINK 45 1707 Quincy Avenue, Unit #159, Naperville, IL 60540 TEL 630-405-8492 FAX 630-839-0990 EMAIL sales@3q-inc.com WEB www.3q-inc.com 3Q, Inc. was started to support fastener distribution with programs to enhance inventory management during the financial crisis of 2008. The tradition continues over 10 years later with products and services unlike any other company in the fastener industry. Our goal is to provide a single part number solution with inventory programs to improve customer service and profitability. 3Q, Inc. provides products that require secondary processes as a complete single part number. It allows for our customers to reduce risk, loss and cost. We continue to expand our value added services. Our business has expanded with customized polybagging, kitting, and assembly solutions. Our ability to work closely with our customers at all levels of an organization provides the needed information to succeed in solving complicated business issues. As goals change from inventory reduction to cost cutting or combination of goals, we never give up in trying to help our customers to be the best they can for their end user customers. Our unique relationship with fastener manufacturers extends beyond the standard buy - sell purchasing agreements. 3Q, Inc. has invested ownership in our sources. We understand the structure and management of global fastener supply chain. 3Q, Inc. has the long term relationships that have earned the respect of our supply base and customers. Every 3Q, Inc. employee works with integrity, respect and quality along with continuous improvement of our ISO9001-2015 quality management system. Why not contact us today and see how we can help your company break out of the old and try something new. BUSINESS FOCUS ARTICLE 3Q INC

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