Würth #8 x 1-5/8" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Black, 3670000357961 3500 - 3500/Box

Wurth Assembly Screw #8 x 1-5/8 For Wood

Wurth #8 x 1-5/8 flat head assembly screw gives you a case hardened fastener sized for common woodworking and cabinet assembly tasks, so joints can be drawn tight using a familiar #8 screw format. The flat head design seats flush in a countersunk hole, which helps parts pull together cleanly where a smooth surface is needed. A square drive recess pairs with #2 Square Drive bits, giving positive bit engagement that helps power tools maintain control during fastening. The coarse thread specified for this screw is suited to bite aggressively into typical wood substrates, so the screw advances quickly and holds firmly. This screw is identified as an assembly screw, signaling its role in bringing together component parts in shop or installation work. The manufacturer part number 3670000357961 3500 ties this specific length, drive style, and finish directly to Wurth supply lines.

Key Fastener Details That Support Assembly

• The #8 diameter stated in the description provides a familiar shank size many woodworkers already drill and drive for cabinets and fixtures, so hole sizing and driving torque usually stay within standard shop practice.
• The 1-5/8 inch length gives reach beyond common 3/4 inch material thicknesses, so the point and threads can fully engage a second layer for stronger pull-through resistance in stacked construction.
• The flat head style is designed to sit down in a countersunk recess, so once driven into a prepared seat the head can finish close to flush, helping parts align without a proud fastener in the way.
• The square drive recess is specified to use #2 Square Drive bits, so bit selection is straightforward and drivers can maintain stable engagement with reduced cam-out during repeated runs.
• The coarse thread noted in the description is intended to advance rapidly through compatible material, so fewer rotations are needed to tighten joints, which helps speed repetitive assembly work.

Threading, Point Style, And Driving Fit Details

The note that 3/4 inch and 1 inch lengths are threaded fully while other sizes are threaded two-thirds from the bottom explains how shorter and longer screws share the same assembly approach. On screws longer than 1 inch, the two-thirds bottom threading allows the unthreaded shank to pull upper pieces snug as the coarse thread bites into the base material. The Type 17 auger point specified in the name is designed to start into material with a drilling action, helping the point cut in as the coarse thread follows. The match with #2 Square Drive bits gives a clear driving interface, so installers can prepare drivers and bits around that standard. Having the fastening role described as an assembly screw highlights that these features are selected around bringing parts together rather than decorative fastening.

Using This Screw In Woodworking And Assembly

Where This Wurth Assembly Screw Performs Best

The classification under Fasteners and Screws, along with the web description listing it for general use with other lengths, places this #8 x 1-5/8 flat head assembly screw in typical woodworking and cabinet shop environments. The coarse thread format works with wood-based materials where a strong bite from fewer threads per inch is valuable for holding power. Its identification as case hardened ties the screw to applications where a hardened outer layer matters for resisting drive wear and shear at the head during powered installation. The black finish referenced in the name defines the visual appearance of the fastener once seated, which can matter when the head remains exposed in darker surfaces or shadowed cabinet interiors.

Why Threading, Case Hardening, And Drive Matter

The note that all sizes in 3/4 inch and 1 inch lengths are threaded fully means those shorter screws present continuous threads along the shank, which can help grip more of thinner stock in compact joints. For lengths beyond those, having two-thirds of the shank threaded from the bottom supports clamping action as the unthreaded section allows upper materials to pull tight against the lower piece. Case hardened construction, stated in the description, creates a hardened exterior that helps the head and drive recess tolerate tool engagement during repetitive driving. The specified #2 Square Drive bit match works with that hardened head by providing deep bit engagement, which supports steady torque transfer. Identifying the screw as #8 x 1-5/8 keeps sizing clear for planning drill diameters and material thickness combinations in ongoing production work.

Common Questions About This Wurth Assembly Screw

Selecting This Screw For Wood Assembly Tasks

This Wurth #8 x 1-5/8 flat head assembly screw combines a square drive sized for #2 bits, coarse thread, and a Type 17 auger point to support wood-based assembly work. The case hardened construction and defined threading pattern across lengths create a consistent fastener line to work with. For projects needing a black flat head appearance with familiar #8 sizing, this screw offers a clearly specified option within the Wurth Baer Supply fastener range.