Blind Bolts : MS Blind Bolts - A286 CRES : Technical Information : "U" Code, UNIMATIC® Single Action Installation

"U" Code, UNIMATIC® Single Action Installation

The UNIMATIC® blind bolt is a single action installation fastener that's installed with one continuous stroke of the installation tool. This method of installation offers the possibility of offset tools for installations in clearance areas.
UNIMATIC® Blind Bolts are identified with the code letter "U" in the Huck and Military part numbers.
UNIMATIC® Blind Bolts are avaliable in Alloy Steel & A286 CRES.
5/32 & 3/16 diameter UNIMATIC® Blind Bolts are also identified with a green dye on the spindle.

1. The fastener is inserted into a prepared hole of the proper thickness. The installation tool is placed over the exposed spindle and bears on the locking collar of the fastener. The tool is actuated to begin the pulling action.

2. Continued pull causes the head of the spindle to upset the sleeve and begin to form the blind side head.

3. As the blind side is formed the spindle is positioned so the nose assembly on the installation tool can drive the locking collar into the conical space between the recess in the sleeve and locking groove on the spindle. This locks the components firmly together.

4. When the lock collar is completely formed the spindle load build up to a predetermined spindle break that separates the pulling section from the installed fastener. There is no projecting spindle to be trimmed off and there is no FOD remaining in the work place.

Total installation cycle is less than 2 seconds

Viewing documents in PDF format requires Adobe Acrobat Reader, which is available as a free download from the Adobe Web site.

Related Documents
How to Order [28KB]

Process Manual [1179KB]

Specifications [859KB]

Related Information

Engineering Standards

Huck Blind Bolt Part Number Cross Reference

Mechanical Properties (A286 Material)

Contact Information
Americas & Asia/Pacific
Customer Support


Technical Support

Europe Customer / Technical Support
+49 8251 8757-0
+49 8251 1652