mcmaster.com
McMaster-Carr
Last scanned Jul 25, 2026, 10:25 AM · 3 views
Overall score
Great
Summary
McMaster-Carr is the complete source for your plant with over 700,000 products. This website is hosted on AKAMAI-AS - Akamai Technologies, Inc., US. SEO is good (85/100) and accessibility is good (85/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
McMaster-Carr is the complete source for your plant with over 700,000 products. 98% of products ordered ship from stock and deliver same or next day.
- United States
- Hosted on AKAMAI-AS - Akamai Technologies, Inc., US
Top issues to fix
6 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
More than 20% of images are missing alt text
AccessibilityAdd alt attributes to the remaining images (use alt="" for purely decorative ones).
SEO
2 issue(s) found
Performance
922 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
McMaster-Carr is the complete source for your plant with over 700,000 products. 98% of products ordered ship from stock and deliver same or next day.
Contact
Email, phone, and address published on this site's own pages.
- sales@mcmaster.com
- Phone
- +13309955500
Meta tags
- Title
- McMaster-Carr
- Description
- McMaster-Carr is the complete source for your plant with over 700,000 products. 98% of products ordered ship from stock and deliver same or next day.
- Canonical
- https://www.mcmaster.com/
- Language
- en
- Charset
- utf-8
- Viewport
- width=1024
- Robots meta
- nofollow, index, max-snippet:-1, max-image-preview:large, max-video-preview:-1
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- AKAMAI-AS - Akamai Technologies, Inc., US
- CDN provider
- —
- IP address
- 23.47.227.249
- ASN
- AS16625 (AKAMAI-AS - Akamai Technologies, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- DigiCert Inc
- Subject
- www.mcmaster.com
- Valid from
- Feb 16, 2026
- Valid to
- Feb 18, 2027
- Days until expiry
- 208
- SAN domains
- www.mcmaster.com, eprocurement.mcmaster.com, eprocurementqual.mcmaster.com, images1.mcmaster.com, images1qual.mcmaster.com, images2.mcmaster.com, images2qual.mcmaster.com, mcmaster.com, www2.mcmaster.com, www2qual.mcmaster.com, www3.mcmaster.com, www3qual.mcmaster.com, www4.mcmaster.com, www4qual.mcmaster.com, www5.mcmaster.com, www5qual.mcmaster.com, wwwqual.mcmaster.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyEnabled
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 27 · H2 61 · H3 5
Links
619 internal · 1 external · 0 broken
Images
36 total · 8 missing alt
Scripts / Styles
0 scripts · 0 stylesheets
JS / CSS size
0 B · 95.5 KB
Page size
189 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 30
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Multiple H1 headings found
- No structured data (JSON-LD) found
Accessibility issues
- More than 20% of images are missing alt text
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://mcmaster.com
- Final URL
- https://www.mcmaster.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 919 ms
- HTML size
- 189 KB
- Redirect chain
- https://mcmaster.com → https://www.mcmaster.com/
See something wrong on this report? Request a correction
Related websites
Same hosting provider
applecard.apple
Apple Card - Apple
credit-suisse.com
UBS financial services in your location | UBS India
itunes.apple.com
iTunes - Apple
exxonmobil.com
Exxon Mobil Corporation | ExxonMobil
ubs.com
UBS financial services in your location | UBS India
xactlycorp.com
Sales Performance Management Software Solutions | Xactly
Frequently asked questions
- What technology does mcmaster.com use?
- We did not detect any specific technologies for mcmaster.com in the latest scan.
- Is mcmaster.com secure (HTTPS)?
- Yes. mcmaster.com uses TLS 1.2 with a certificate issued by DigiCert Inc, valid until Feb 18, 2027.
- Who hosts mcmaster.com?
- mcmaster.com is hosted on AKAMAI-AS - Akamai Technologies, Inc., US.
- What is mcmaster.com's SEO score?
- mcmaster.com scored 85/100 for SEO in the latest analysis (great).
- What is mcmaster.com's overall website score?
- mcmaster.com has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.
- Is mcmaster.com hiring?
- mcmaster.com has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card