Anyone determine what the definition/properties of this bolt

  • Thread starter Thread starter bbrees
  • Start date Start date
  • Tags Tags
    Bolt
Click For Summary

Discussion Overview

The discussion revolves around the definition and properties of a specific bolt described as 3/4 x 4 CS-N-LW. Participants explore various interpretations of the specifications and potential applications of the bolt.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants note that a 3/4-4 specification indicates a coarse thread, but question whether it aligns with the UN series thread standards.
  • There is a query about the context in which the bolt is used, suggesting that its application might clarify its specifications.
  • Some participants propose that the "4" could imply a military specification or relate to rebar dimensions.
  • One participant suggests the possibility of it being an ACME thread, particularly in lead or ball screws, noting that 4 turns per inch are common.
  • Another participant questions whether the description could refer to a vacuum fitting instead of a traditional bolt.
  • Concerns are raised about the typical thread pitch for a 3/4" bolt, with one participant indicating that it usually starts at 5 TPI.

Areas of Agreement / Disagreement

Participants express multiple competing views regarding the specifications and potential applications of the bolt, indicating that the discussion remains unresolved.

Contextual Notes

There are limitations regarding the assumptions made about the thread types and applications, as well as the lack of specific context for the bolt's use.

bbrees
Messages
1
Reaction score
0
Anyone determine what the definition/properties of this bolt is?
3/4 x 4 CS-N-LW
 
Engineering news on Phys.org
a 3/4-4? That's one coarse thread. It's definitely not a UN series thread. Can you tell us what context you are seeing this callout? What is it used in, etc...
 
FredGarvin said:
a 3/4-4? That's one coarse thread.
Thats what I thought, is there an alternate way of specifying threads in the US? Does 4 on it's own imply MIL?

Or it could be rebar,thats about 3/4-4!
 


Could it be an ACME thread? Lead or ball screws with 4 turns per inch are pretty common. The CS-N-LW could just be the manufacturer's material & finish specifications.
 


Do you actually have one of these or just the description? If just the description, is there any possibility that this refers to a vacuum fitting?
 


jasc15 said:
Could it be an ACME thread? Lead or ball screws with 4 turns per inch are pretty common. The CS-N-LW could just be the manufacturer's material & finish specifications.
I too thought about that, but, from what I saw, 3/4" starts at 5 TPI.
 

Similar threads

Wood/Glass/Metal Stop these carriage bolts from spinning when I tighten nuts
  • · Replies 12 ·
Replies
12
Views
3K
Analytical verification of FEA involving preloaded bolt
  • · Replies 9 ·
Replies
9
Views
3K
Design of bolts - Influence of higher free length
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Understanding Bolted Joints: Shigley's Explanation & Real-Life Testing
  • · Replies 8 ·
Replies
8
Views
5K
Reusability of nuts and tapped holes + Choosing the right material
  • · Replies 3 ·
Replies
3
Views
2K
Determine how many bolts are needed to secure a block of steel
  • · Replies 1 ·
Replies
1
Views
2K
Engineering Maximizing Thread Strength: Stress Analysis on M10 Bolt with 100 kg Load
  • · Replies 3 ·
Replies
3
Views
3K
Experiment measuring the distance dependence of a suspended metal bolt from a magnet
  • · Replies 13 ·
Replies
13
Views
1K
Undergrad Is Transverse Strain Zero at the Bolts of a Clamped Circular Membrane?
  • · Replies 2 ·
Replies
2
Views
1K
Bolt Tightening - Torque versus Tension
  • · Replies 1 ·
Replies
1
Views
2K