Tubular Passage Door Knob Lock for Interior Hall & Closet
- Product Information
Standard Specs & US Door Prep Dimensions
Door Thickness
Standard US residential doors are either 1 3/8 inches (interior) or 1 3/4 inches (exterior) thick. Standard hardware prep requires a 2 1/8-inch cross-bore hole through the door face, a 1-inch latch hole in the door edge, and a latch backset of either 2 3/8 or 2 3/4 inches.
Bore Hole
A 2 1/8-inch diameter hole is drilled through the face of the door where the handle or lockset sits.
Edge Hole
Cross-bore: A 1-inch hole drilled through the edge of the door into the borehole, designed to hold the latch bolt.
Faceplate
Latch Faceplate: The rectangular plate on the door edge comes in either square corner or round corner (usually 1/4-inch radius) styles
Backset
Backset: The distance from the edge of the door to the center of the 2 1/8-inch borehole. Common measurements are 2 3/8 inches (standard for interior) and 2 3/4 inches (standard for exterior).
Installation Reference Drawings
Download Full Installation Template PDF
Finishes & Color Options
Brush Stainless Steel
Soft brushed stainless steel matte surface, fingerprint resistant, scratch resistant, matches modern minimalist interior door hardware, stable electroplated layer for long service life.
Matt Black
Uniform matte black coating, non-reflective, industrial & modern farmhouse style, anti-fade and easy daily cleaning without visible fingerprints.
PVD Polished Brass
Bright high-gloss PVD polished brass finish, ultra wear-resistant, corrosion resistant, luxury bright golden tone for high-end residential decoration.
Antique Bronze
Vintage dark antique bronze texture, hand-worn retro effect, perfect match for traditional, farmhouse and vintage wooden interior doors.
Antique Copper
Reddish vintage antique copper textured plating, rustic industrial aesthetic, warm retro tone fits cottage and antique style door sets.
Function Options
Entry
Entrance lock for exterior doors, lock/unlock from outside with key, internal turn button for locking, suitable front entry doors with security demand.
Privacy
Bathroom & bedroom lock, internal locking button, external emergency slot release for accidental lockout, no exterior key cylinder.
Passage
Non-locking hall/closer door set, free access both sides all time, no lock mechanism for traffic passage doors.
Dummy
Fixed decorative knob without internal lock/latch, only for matching double door inactive side or cabinet decoration.
Latch & Strike Plate Options
G3LS01 Square corner Latch
Width 1"× Length 2-1/4" ( W25.4×L57mm) ,Plate Thickness:1.2mm Adjustable 60/70 mm Backset 75 Open Degree.
G3LR01 Radius corner Latch
Width 1"× Length 2-1/4" ( W25.4×L57mm) ,Plate Thickness:1.2mm Adjustable 60/70 mm Backset 75 Open Degree.
G3LD01 Drive In Latch
Outside Dia 26mm Adjustable 60/70 mm Backset 75 Open Degree.
D01 D shape Strike
Size Width 1-1/2"× Length 2-1/4" (39.5×57mm) Thickness 1.2 mm .
T01 T shape Strike
1-1/2"×2-3/4" (38×70mm) Thickness 1.2 mm optional.
C01 Circular Strike
Circular shape strike plate for matching round edge door frame installation.
Complete Components List
Dust Box
Plastic Dust Box: It is inserted directly into the hole bored into the wooden door frame, right behind the metal strike plate. It prevents wood shavings, dust, or insulation from entering the latch cavity.
Mounting Screws
Tightening these screws clamps the inside and outside knobs tightly against both faces of the door, keeping the lock assembly rigid and stable so it doesn't wobble when turned.
Wood Screws
Two of these screws are used on the edge of the door to securely fasten the faceplate of the spring latch mechanism into the recessed wood cutout.The remaining two screws are used on the door frame (jamb) to firmly anchor the metal strike plate (and the plastic dust box behind it) into the wood, ensuring the door catches and locks securely.
- Packaging Solutions
White Inner Box
Standard white kraft inner box for single set packing, clean neutral appearance, widely used for general wholesale orders.
Brown Inner Box
Eco-friendly brown kraft box without printing, cost-saving bulk packing solution for large quantity shipments.
Color Inner Box
Custom full-color printed box with brand logo, premium retail packing for supermarket and offline store sales.
Blister Inner Pack
Transparent PVC blister tray with paper card, clearly display lock set, ideal for hardware retail shelf display.
Export Carton
5-layer heavy duty export carton, holds multiple inner boxes, shockproof and moisture resistant for sea freight transport.
Color Outer Carton
Full-color printed sales export carton with real product photo, brand name WingsTec, complete carton specs, weight & dimension data. Attractive advertising design for overseas wholesale & retail market display.
- B2B Cooperation
Full US Standard Compliance: Meets ANSI/BHMA Grade 3 residential standards, fully compatible with standard American interior door prep requirements.
Universal Reversible Design: Reversible left/right-hand installation without extra parts, suitable for all standard interior wooden doors.
Multiple Finish Options: Available in 8 popular finishes to match modern, farmhouse, vintage and luxury interior styles.
Mixed Bulk Order Support: Flexible MOQ allows mixed colors and functions for small and medium wholesale orders.
Stable Production Capacity: Mature production line ensures stable output, on-time delivery and consistent quality for long-term project orders.
Laser Logo Engraving: Custom brand logo available on door knobs, face plates and packaging boxes.
Packaging Customization: Custom color printed boxes, brand printing, OEM neutral packages, and PVC blister retail packs.
Hardware Matching: Free selection of multiple latches and strike plates (square corner, radius corner, drive-in, D-shape, T-shape and circular strike).
Sample Order: 1–5 sets for quality evaluation; sample lead time: 3–7 working days.
Bulk MOQ: 50 sets for mixed colors and mixed functions; tiered discount for orders over 500 sets.
Production Lead Time: 7–10 working days for small bulk orders; 12–18 working days for full container orders; rush orders are acceptable.
Trade Terms: EXW, FOB, CFR, CIF available.
Complete Export Documents: Commercial invoice, packing list, CO certificate, and official ANSI/BHMA test reports for customs clearance.
5-Year Factory Warranty: Free replacement parts for manufacturing defects within the warranty period for bulk orders.
Full Marketing & Technical Support: Provide high-resolution product images, official installation manuals, and product spec datasheets to support Amazon, Home Depot and offline retail store listings.
- FAQ
Yes, it fully meets ANSI/BHMA Grade 3 standard and fits standard US interior door prep sizes.
Universal reversible design, no extra parts needed for left or right handed installation.
Fits 1-3/8" / 1-3/4" doors; adjustable 60mm(2-3/8") & 70mm(2-3/4") backset.
Brush Nickel, Brush Chrome, Oil Rubbed Bronze, Antique Brass, Antique Copper, Antique Nickel, PVD Polished Brass.
MOQ 50 sets mixed finish/function; samples 1–5 sets, lead time 3–7 working days.
Support laser engraving logo on knobs, custom color boxes, neutral OEM packs and blister retail packaging.
5-year factory warranty. Free replacement spare parts for manufacturing defects on bulk orders.
30% T/T deposit before production, balance against B/L copy. EXW / FOB / CFR / CIF supported, full export documents supplied.