Product Description 7/16 " crown. For Use With Bostitch: PC1000, PC2000, PC4000, PC5000, H30-8 and P6C-8 tackers. STCR50191/2-4M and STCR50191/2-1M do not fit H30-8 or P6C-8 tackers. STCR50191/2-1M also fits PC3000. From the Manufacturer Bostitch manufactures over 2000 types of fasteners. Each fastener is engineered for optimal performance in Bostitch tools and for exceeding the performance expectations of our customers. Our goal is to continually increase efficiency, productivity and quality and to ensure building code compliance through the ICC ESR 2020, ICC ESR 1539 and ICC ER 5426 reports. Our team of engineers leads the industry in innovation and design. Utilizing our advanced laboratory, our team of engineers conducts environmental testing to study the effects of storm forces and other weather conditions, withdrawal testing to evaluate new coatings, penetration testing to evaluate drive characteristics and development testing to optimize withdrawal, shear and pull-through performance. Bostitch stick nails are designed, engineered and manufactured in four different forms and are generally identified by what holds the nails together - plastic, wire, paper or adhesive. Adhesive collation is used on finish nails and brads for trim and fine woodwork. Finish nails and brads range in length from 3/8-Inch to 2-1/2-Inch with diameters ranging from 15 to 23 gauge. The plastic, wire and paper collated nails are used for general framing and crating applications. Stick nails range in length from 1-1/2-Inch to 6-1/4-Inch with diameters ranging from 0.113-Inch to 0.165-Inch.