Stair tread bolt Set 1A, T=35 mm, for screwing into wood

Stair tread bolt Set 1A – groove fixing

LamiFIX stair tread bolt Set 1A allows grooved treads to be fitted to a wooden stringer or directly into a wooden wall without a stringer. The connector sits in the tread groove, leaving the fixing largely hidden.

Application and design

Set 1A is designed for screwing into wood. The version offered has an embedment depth of T = 35 mm with an 18 mm gap; the same bolt can be screwed in to T = 53 mm for flush installation. According to the catalogue, T = 35 mm is suitable for D30 hardwood to EN 338 in the illustrated grain directions. Glued laminated timber and softwood require greater embedment depths; refer to the table in the product gallery. Version A is designed for installation with a groove in the tread.

Installation

Holes in the wooden stringer or wall must be drilled accurately in position and angle.

For stairs without stringers, we lend drill bushes free of charge for up to three months. They make accurate on-site drilling straightforward.

Technical details

• Set: 1A and Set 3624A (flush, T = 53 mm)
• Embedment depth: T = 35 mm or T = 53 mm flush
• Bolt installation: screw into wood
• Tread machining: groove, installation version A

Required quantity per Set

• 1 stair tread bolt INOX A2, LF 3623.035.1
• 1 tread fixing screw LF 1541.002
• Waxilit lubricant LF 3625.001, required quantity: 1/50 tube per Set

Article number: LF 3623.135.4

Matching installation accessories

Driving tool LF 2150.036.3 and Ø25 mm HSS wood twist drill bit LF 2001.250.3 are available separately. Detailed information on the drilling aid is provided on catalogue page 26.