Comments on: What Do Screw and Bolt Head Markings Mean? /what-do-screw-and-bolt-head-markings-mean/ Quality Bolts, Screws, & Studs Tue, 09 Jan 2024 02:42:44 +0000 hourly 1 https://wordpress.org/?v=7.0 By: Richard /what-do-screw-and-bolt-head-markings-mean/#comment-6665 Tue, 09 Jan 2024 02:42:44 +0000 /?p=359#comment-6665 I have a bolt with 3 radial lines. It is a manufacturer’s replacement for a shear bolt on a snowblower. Unfortunately, I’m not able to find the trademark in the pdf file. I tried to show what it looks like, but this editor deletes it. Is there anything special to indicate if a bolt is for shear purposes?
Can I use any 3 line radial bolt as a replacement? If not how do I tell if a bolt is capable of being used in a shear situation? Thanks for your help

]]> By: Mike /what-do-screw-and-bolt-head-markings-mean/#comment-5294 Wed, 27 Sep 2023 18:59:59 +0000 /?p=359#comment-5294 In reply to Gregorio Abellera.

I have a broken bolt originating on a 1972 Norton motorcycle with headstamp showing FCF on upper half of head and an S below. Can you tell me the grade of this bolt, anyone?

]]> By: Glenn Clifford Hall /what-do-screw-and-bolt-head-markings-mean/#comment-4073 Fri, 26 May 2023 22:52:22 +0000 /?p=359#comment-4073 What does DS1 mean on a bolt head??

]]> By: Ray /what-do-screw-and-bolt-head-markings-mean/#comment-1812 Tue, 08 Nov 2022 20:36:26 +0000 /?p=359#comment-1812 Why do some fasteners have a small groove machined around their hexagon head?

]]> By: Ryan /what-do-screw-and-bolt-head-markings-mean/#comment-1645 Sun, 23 Oct 2022 13:02:49 +0000 /?p=359#comment-1645 In reply to Scott Farrell.

“The” is manufacturer mark, “304” is the grade of stainless steel it’s made from

]]> By: Balasaravanan Ramasamy /what-do-screw-and-bolt-head-markings-mean/#comment-1187 Tue, 30 Aug 2022 04:51:34 +0000 /?p=359#comment-1187 What is the meaning of DF in printed on the head of the bolt.

]]> By: Gregorio Abellera /what-do-screw-and-bolt-head-markings-mean/#comment-1055 Wed, 10 Aug 2022 16:10:13 +0000 /?p=359#comment-1055 In reply to James Woeppel.

What does the letter “U” mean when stamped on the head of a Phillips head screw?

]]> By: Percy Richardson /what-do-screw-and-bolt-head-markings-mean/#comment-835 Tue, 21 Jun 2022 22:39:27 +0000 /?p=359#comment-835 Information on bolt 3/8 with a arm holding a hammer hitting an anvil. Any information appreciated

]]> By: Jason Holm /what-do-screw-and-bolt-head-markings-mean/#comment-818 Thu, 16 Jun 2022 17:02:25 +0000 /?p=359#comment-818 Is Cadmium Plating to QQ-P-416 Class 3 available?
We have an old drawing with these requirements in a 1 inch, Grade 8, 10p, 1/4-20 UNC-2A screw, which also needs a MIL-F-18240 Patch.

]]> By: Laura /what-do-screw-and-bolt-head-markings-mean/#comment-771 Sun, 05 Jun 2022 22:06:42 +0000 /?p=359#comment-771 In reply to Stephen West.

What are the YHC bolts in Chevy motor for?

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