Adjustable solar tile roof hook

Specifications

Product Specification Sheet
Product Name	Adjustable Solar Tile Roof Hook Stainless Steel Mounting Bracket
Part No.	SRH-A01
Category	Solar mounting brackets
Overview	Adjustable stainless steel tile roof hook for pitched-roof PV mounting systems. Multi-hole rectangular base plate （round + slotted holes）fixes onto timber rafters/battens, while an S/Z multi-bend hook arm with a serrated top slot connects the aluminium rail and allows on-site height adjustment; two structural variants are available （welded vertical post + bolted hook arm, or a two-piece bolted design）.
Version	V1.0 \| 2026-09-15
Material
Main material	SUS304 stainless steel, matte pickled/passivated finish （SUS316L optional for coastal or high-chloride environments）
Material grade & standard	ASTM A240 / A666 Type 304 （EN 1.4301, GB/T 3280 06Cr19Ni10）, plate & strip
Alternative material	SUS316L （EN 1.4404） for C5 coastal / saline exposure; hot-dip galvanized or Zn-Al-Mg coated carbon steel Q235B/S350GD for cost-driven inland projects
Raw material form & thickness	Flat plate / flat bar, 4.0-5.0 mm （0.157-0.197 in）nominal; base plate and hook arm 5.0 mm （0.197 in), vertical post 5.0 mm（0.197 in）
Fastener material & grade	M10 （and M8 option） stainless steel hex socket cap screw, A2-70 / A4-80 per ISO 4762, with matching flange nut, plain washer and spring washer
Material certificate	EN 10204 3.1 mill certificate with heat number traceable to each production lot, retained 10 years
Design life context	Corrosion-resistant construction intended for 25-year outdoor PV service life （Context of a 25-year design life） with no sacrificial coating depletion on stainless steel
Process
Cutting	Laser cutting / high-precision CNC punching of base plate, vertical post and hook-arm blank from 5.0 mm （0.197 in） plate; deburred edges, no shear cracks
Forming (bending)	CNC press-brake air bending, 90-degree and multi-step S/Z bends on hook arm and （variant B） 90-degree upstand bend on base plate; bend radius R >= 1.0 t, sharp inner / rounded outer corner
Welding (vertical post fillet weld)	Variant A only: continuous 3-4 mm （0.118-0.157 in） fillet weld at the junction where the vertical mounting post meets the top surface of the base plate; TIG/MIG, full penetration at root, weld dressed and passivated
Bolt assembly & adjustment mechanism	Hook arm bolted to base/vertical post through a long slot giving approx. 25-40 mm （0.98-1.57 in） vertical （height） adjustment travel; top rail slot approx. 35-55 mm（1.38-2.17 in） long; interlocking serrated faces lock the joint after tightening
Secondary operations (drilling, tapping, serration stamping)	Punched round holes and oblong （slotted） holes on base plate; anti-slip serrations（transverse teeth） stamped on the mating face of the vertical post and the hook arm; M10 clearance holes 11.0 mm （0.433 in）, tapped holes as required
Surface pre-treatment	Degreasing, weld spatter and oxide/heat-tint removal, then pickling and passivation of all cut edges and welds before final cleaning
Key process control points	Hole position on base plate, bend angles of the S/Z hook, slot length and alignment of the serrated faces, fillet weld quality for variant A, and bolt clamping torque control
Assembly & accessory matching	Hook arm, base, bolt/nut/washers pre-assembled and lightly torqued for shipment; serration engagement verified before packing
Surface treatment
Treatment method	Pickling and passivation （ASTM A967 / ASTM A380） for stainless steel; optional light shot blasting for uniform matte appearance
Coating / layer thickness	No applied coating; passive chromium-oxide film, natural, typically 2-5 nm; if galvanized carbon steel variant is chosen, hot-dip zinc layer >= 65-85 um （0.0026-0.0033 in）
Color & appearance	Natural stainless steel silver-grey, uniform matte, no rust spots, no heat-tint, no oil residue or scratches
Standard & salt-spray requirement	Stainless steel: neutral salt spray （NSS, ASTM B117 / ISO 9227） >= 720 h without red rust （SUS304）, >= 1000 h for SUS316L; galvanized variant >= 480 h
Surface roughness	Ra <= 3.2 um （126 uin） on visible faces; weld and heat-affected zones cleaned to match adjacent surface
Pre-treatment	Alkaline degreasing, water rinse, acid descaling, DI-water rinse, drying before passivation; no iron contamination from carbon-steel tooling
Tolerance
Overall profile tolerance	Base plate length/width +/- 0.5 mm （+/- 0.020 in）; hook arm overall developed length +/- 1.0 mm (+/- 0.039 in）
Hole diameter & position tolerance	Round hole dia. 11.0 mm （0.433 in） for M10, +0.2/0 mm; hole-to-hole centre distance +/- 0.3 mm （+/- 0.012 in）; oblong slot width 11.0 mm （0.433 in） +0.2/0 mm
Bend angle & radius tolerance	90-degree bends +/- 1.0 degree; other bend angles +/- 1.5 degrees; inner bend radius R = 1.0-1.5 t （approx. 5.0-7.5 mm / 0.197-0.295 in）
Weld position tolerance	Vertical post perpendicularity to base plate <= 1.0 mm per 100 mm （<= 0.039 in per 3.94 in）; post position offset +/- 1.0 mm (+/- 0.039 in); leg size 3-4 mm （0.118-0.157 in）
Flatness & straightness	Base plate flatness <= 0.5 mm （0.020 in） per 100 mm; hook arm straightness <= 1.0 mm （0.039 in）over full length
Adjustment travel & fit tolerance	Vertical height adjustment approx. 25-40 mm （0.98-1.57 in） travel; top rail slot 35-55 mm （1.38-2.17 in) long; slot-to-bolt clearance 0.5-1.0 mm （0.020-0.039 in） for free sliding
Thread & fastener fit	M10 x 1.5 （or M8 x 1.25） ISO metric coarse thread, class 6g/6H; assembly torque approx. 35-45 N*m for M10 A2-70, washer-faced joints
Dimension basis	Inspection per customer-approved drawing / technical agreement; where unspecified, GB/T 1804-m and GB/T 1184 general tolerances apply
Packaging
Surface protection	Each part wrapped in VCI anti-corrosion paper or PE film to prevent scratches and iron contamination during transport
Inner packaging (with fasteners)	Pre-assembled hook arm + base + M10 （or M8） bolt, nut, washers packed as one set in a PE bag, 1 set per bag
Outer packaging	5-layer corrugated carton, or wooden pallet / plywood case with strapping for bulk export orders
Qty per carton & carton size / gross weight	Standard: 50 sets per carton, carton approx. 400 x 300 x 200 mm （15.75 x 11.81 x 7.87 in）, gross weight approx. 25-28 kg （55-62 lb）
Marking & shipping marks	Carton labeled with product name, part no. SRH-A01, quantity, net/gross weight, batch/heat number and customer shipping marks; no certification numbers printed
Container loading & stacking	Palletized and stretch-wrapped; max stacking 5 cartons high for carton packing, 2 pallets high for export pallets; loading plan issued before shipment
Storage & transport	Store in dry, ventilated indoor area away from acids/salts; keep packaging intact; handle without dragging to avoid surface damage
Quality control
Incoming inspection	100% verification of material grade （PMI / XRF spot check）, thickness 5.0 mm （0.197 in） +/- 0.15 mm, surface condition and mill certificate against purchase order
First-article approval	First article （FAI） inspection of hole pattern, bend angles, slot travel, serration engagement and weld position before mass production; FAI report signed and retained
In-process inspection frequency	Patrol inspection every 2 hours per machine/station; key characteristics（holes, bends, slots, serrations） checked on 5 pcs per batch sampling
Final & pre-shipment inspection	AQL 2.5 / ISO 2859-1 sampling for appearance, dimensions, assembly function （slot sliding and serration lock） and fastener completeness; pre-shipment report before loading
Inspection equipment	CMM / video measuring system, digital calipers and micrometers, bend-angle gauge, weld gauge, torque wrench, surface roughness tester, salt-spray test chamber
Inspection records & reports	Dimensional report, material certificate, weld inspection record and salt-spray report issued per lot; records retained 10 years and traceable by batch/heat number
Non-conforming product control	Non-conforming parts segregated and tagged in a locked area; disposition by rework, repair, concession or scrap per 8D / CAPA; root cause analysis within 48 hours
Quality system & certification	Manufactured under ISO 9001:2015 quality management system（Shandong, China）; system certificate available on request; product-specific certifications only when explicitly agreed in contract
Notes	The parameters listed in the table are standard values based on product photographs and our factory's standard manufacturing processes. For items marked as "Recommended Values," as well as all dimensions, materials, and tolerances, the final specifications shall be determined by the customer's drawings (2D/3D), technical agreements, and the results of the first-article inspection.
Drawing Format	3D: .step / .stp / .igs 2D: .dxf / .dwg / .pdf
For Quotation	Drawing + material + surface treatment + quantity + tolerance requirement