ROOFING NAILS
Umbrella Head Roofing Nails
Umbrella head · Washer options
Umbrella-head nails for roofing enquiries, with shank and washer requirements confirmed to your order. Send your drawing or required dimensions, finish and packaging.
Format
Loose umbrella-head roofing nails
Source size references
8G–13G; use the measured shank diameter in the table
Head diameters
14, 18 or 20 mm, according to the listed size
Materials
Q195 / Q235
Shank options
Smooth, ring or twisted / spiral
Finish
Galvanized; coating type agreed for the order
Availability, material grade, finish and tool compatibility will be checked for the requested configuration and stated in your quotation.
Sizes and specifications
Umbrella-head nail sizes
Source size references are retained individually. Gauge labels and metric values are not a newly standardized conversion.
On smaller screens, swipe the table to see all columns.
Source gauge
Shank diameter (mm)
Head diameter (mm)
Nominal length (inches)
Source length (mm)
8G
4.19
20
2"
51.2
8G
4.19
20
2-1/2"
64.0
8G
4.19
20
3"
76.2
9G
3.85
20
1-1/2"
38.4
9G
3.85
20
2"
51.2
9G
3.85
20
2-1/2"
64.0
9G
3.85
20
3"
76.2
10G
3.4
20
1-3/4"
44.5
10G
3.4
20
2"
51.2
10G
3.4
20
2-1/2"
64.0
10G
3.4
20
3"
76.2
11G
3.15
18
1-1/2"
38.4
11G
3.15
18
1-3/4"
44.5
11G
3.15
18
2"
51.2
11G
3.15
18
2-1/2"
64.0
12G
2.80
18
1-1/2"
38.4
12G
2.80
18
1-3/4"
44.5
12G
2.80
18
2"
51.2
12G
2.80
18
2-1/2"
64.0
13G
2.38
14
1-1/2"
38.4
13G
2.38
14
1-3/4"
44.5
13G
2.38
14
2"
51.2
The source pairs include 1-1/2" / 38.4 mm and 2" / 51.2 mm. Inch sizes are nominal labels, not exact metric conversions; agree the controlling dimension and tolerance on the order.
Specification notes for ordering
The source’s BWG summary does not agree with its 8G–13G table. Select by the stated shank/head dimensions and confirm the controlling gauge standard and length tolerance.
DEFINE THE ORDER, NOT JUST THE FASTENER
Packing, samples and order documentation.
Materials, shanks and packing
Parameter
Reference
Steel material references
Q195 / Q235
Shank options
smooth; ring; twisted
Finish
Galvanized; coating type and thickness specified for the order
Small-box packing
8 small boxes or 16 small boxes in one big carton
Bulk packing
20 or 25kg bulk in carton
Washer
Specify with or without washer; washer material and dimensions are selected separately
Customization
OEM enquiries
Packing and washer options are agreed for the chosen size. These loose nails are distinct from wire-collated roofing nails.
APPLICATION EXAMPLES
Where it's used
Explore the materials, joints and workshop tasks below. Match the fastener size and tool to your own workpiece before ordering.
Specified sheet-to-timber fixings
Evaluate umbrella-head nails only where the sheet system permits the complete fixing assembly.
Head and washer matching
Compare the nail head and any separate washer against the approved roofing-sheet detail.
Replacement specification checks
Match a replacement nail to the approved sample, sheet profile and timber support.
AI-generated application illustrations, not customer project photographs.
START WITH THE ROOF SYSTEM
Confirm the head and washer assembly.
Head
Nail length
Shank diameter
Point
Measurement guide · schematic, not to scale. Refer to the listed dimensions and an approved order drawing.
Covering → fastener → substrate → exposure
An umbrella head and any cap or washer must be specified as an assembly. Confirm what is included, how it seats on the roofing material and which installation method the system requires.
- Identify the exact roof covering and substrate.
- Follow the roof-system manufacturer’s installation requirements.
- Specify the head or washer, required penetration and corrosion environment.
- Confirm local project requirements and product documentation.
Choose for your workpiece and equipment
01
Quote explicit metric dimensions
Provide shank diameter and length in millimetres. Use a confirmed drawing rather than relying on gauge or inch labels alone.
02
Define the sealing components
State whether washers are required, their material and dimensions, and how the roof system controls sealing. The metal head shape alone does not establish a watertight installation.
03
Check roof and support compatibility
Confirm whether the system calls for nails or screws and whether the support is timber or metal. Assess the proposed sample with the prescribed sheet and fixing detail.
Questions before you order
Does an umbrella head make the nail waterproof?
No. Weather sealing depends on the complete fixing assembly and the roof-system installation detail.
Can these replace the nails supplied with branded corrugated sheets?
Only with the roof-system manufacturer’s acceptance of the exact replacement. Appearance or a similar head diameter is insufficient.
Application limits to check
- Do not treat umbrella-head loose nails as shingle coil nails.
- Do not substitute for a proprietary roofing-system fastener or a specified metal-support screw.
FROM THE BLOG
