M4 x 90mm Slotted Door Handle Screws BRASS with Bolt Connecting Sleeve Male to Female for Handle, Knobs Escutcheons and Others (Pack of 4)

M4 × 90mm SLOTTED DOOR HANDLE THROUGH-BOLT SET Components: M4 threaded bolt with slotted head + matching connecting sleeve (male-to-female pair). Function: passes through thick doors to attach door handles, knobs, escutcheons, and rosettes on both sides. Construction: solid metal with finish plating. Thread: M4 standard metric. Drive type: slotted head (single straight slot, requires flat-blade screwdriver). M4 × 90mm DIMENSIONS Thread: M4 (standard metric coarse thread). Bolt length: 90mm — long variant for thick doors. Suits doors: up to approximately 75-78mm thick (depending on handle/escutcheon/rosette depth on both sides). Configuration: male bolt threads INTO female sleeve through the door. Drive: slotted head — requires flat-blade screwdriver. Compared to standard 60mm bolts: 30mm extra reach for thick door applications. PACK OF 4 — FOUR COMPLETE SETS Pack contents: 4 matched brass slotted bolt + sleeve sets (enough for two thick-door installations). Each set: 1 male M4 × 90mm slotted bolt + 1 female connecting sleeve. Finish: Brass — warm polished brass tone. Variation options: this product is available in Chrome and Brass finishes in Pack of 2 or Pack of 4. APPLICATIONS — THICK DOOR HANDLE ATTACHMENT Use cases: fire doors (FD30 and FD60), external doors, solid hardwood doors, oversized internal doors, period property doors, restored Victorian doors with original-thickness panels. Sectors: residential entrance doors, hotel and office fire doors, commercial fit-out, period restoration. Compatible with: standard M4-thread door handle/knob assemblies. Fire door note: for FD30/FD60 fire doors, verify the bolt/sleeve set is compatible with intumescent fixings if specified in your fire door certification. INSTALLATION GUIDANCE 1. Position the handle/escutcheon on the front face of the door. 2. Insert the female sleeve through the spindle hole from the back of the door. 3. From the front, insert the male slotted bolt into the sleeve through the front handle/escutcheon. 4. Use a flat-blade screwdriver to tighten — do NOT over-torque (slotted heads strip easier than Phillips). 5. Spindle and latch supplied separately. Browse our store for matching spindles, escutcheons, and complete door handle sets.