Tel：
+86 13143444311
Email：sst@szsst88.com
Fax：+0086-755-27322278
Address：Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Type:Carbon steel male-female round standoff, blue zinc
Materials:Carbon steel
Surface treatment:Blue zinc plated
Head Type:Round body
Thread:Male thread one end, female thread the other
Forming:CNC turning (bar stock)
Number:1825
We manufacture carbon steel male-female round standoffs, blue zinc plated, with a threaded stud on one end and a tapped hole in the other, turned from bar with both threads on one axis and both gauged after plating. Body length, thread depths, which end is male and the plating thickness are made to your drawing.
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ISO 9001:2015 · Manufacturing since 1998 · 8,678+ customers · 89 countries and regions
Made to order – there is no stock catalogue. Each part is produced to your drawing, and production starts after drawing review and first-article approval.
A male-female round standoff is a cylindrical spacer with a threaded stud on one end and a tapped hole in the other. It holds two surfaces a fixed distance apart, ties them together, and lets a second screw enter from the far side, so a board or a panel can be stacked and fixed without a nut behind it.
On a male-female round standoff the two ends do different jobs. The male stud passes through a hole and engages a nut or a tapped insert; the female hole in the other end accepts a screw from the outside face. The length between them sets the gap, and both thread depths have to leave enough material in the middle of the body.
Round body, no drive recess. The body is turned round and the ends are threaded; there is no slot or socket on the cap. The part is run down by hand and finished with a clamp, a stud driver, or by tightening the screw at the female end, depending on how the assembly is built.
Blue zinc on carbon steel. The zinc layer protects the carbon steel body and threads, but it also adds thickness to both threads. On a male-female round standoff the coating has to be thin enough that the male thread still fits the nut and the female thread still takes the mating screw, so the plating thickness is part of the thread specification.
Together these decide how the part behaves on site: it sets and holds the gap, it takes a screw from the outside, and both threads remain usable after plating.
A male-female round standoff is turned from carbon steel bar. The bar is cut to length, the body is turned to diameter, both ends are faced and chamfered, the male thread is cut or rolled, and the female hole is drilled and tapped from the opposite face. Length, body diameter and the two thread axes come off the same set-up.
The female end is the harder of the two. The hole has to be drilled deep enough for the specified thread depth but not so deep that it breaks into the body wall or meets the male stud from the other side. On a short male-female round standoff the wall between the two threads is only a few millimetres, so the drawing states both thread depths and the minimum solid section between them.
Threads are produced after turning, and the part is deburred before plating. A burr at the mouth of the female hole will stop the mating screw starting, and a burr at the male thread end will damage the nut on assembly, so both are removed before the zinc goes on.
Male-female round standoffs are quoted from M2 to M12 thread sizes and in body lengths from a few millimetres to 200 mm, with length usually held to +/-0.1 mm on the drawing. Where a longer version is required, custom lengths up to 2,000 mm are subject to DFM review after drawing submission.
| Item | How it is defined | What we control |
|---|---|---|
| Overall length | From the face of the male thread end to the face of the female end | Length measured over the body, not over the thread |
| Body diameter | The round body between the two threaded ends | Body turned to the drawing diameter |
| Male thread length | How far the stud stands out of the body | Thread length and run-out checked on the first article |
| Female thread depth | How deep the tapped hole runs from the far face | Depth and minimum solid section between the threads |
| Alignment | The two threads on one axis | Male thread and female hole produced in one set-up |
Each thread size and body length is checked against the drawing before a quotation is issued. A male-female round standoff with a short body has less material between the male stud and the female hole, so the check confirms that both thread depths fit without leaving a thin wall.
Length is measured over the body faces, not over the thread, and the female depth is read from the same face. Body diameter, thread length and the alignment of the two threads are gauged on the first article before a batch is released.
For a male-female round standoff the drawing fixes six things: thread size and pitch at each end, male thread length, female thread depth, overall length, body diameter, and the material and finish. A seventh line matters where the two ends differ: which end carries the male thread and which carries the female.
| Parameter | Why it matters on a standoff | What we control |
|---|---|---|
| Male thread length | It sets how deep the stud enters the base | Length and run-out checked on the first article |
| Female thread depth | A shallow hole leaves too few threads for the mating screw | Depth checked with the mating screw and a depth gauge |
| Thread class | Zinc adds thickness; the class has to be read after plating | Thread gauged in the plated condition |
| End assignment | A standoff threaded on the wrong end will not assemble | End marked on the drawing and checked on the part |
Blue zinc is an electroplated zinc layer on carbon steel, applied after turning and threading. It protects the body and both threads, but it also builds up on the thread flanks. On a male-female round standoff the plating thickness is therefore specified with the thread class, and the threads are gauged after plating rather than before.
| Finish | How it protects | Effect on threads | Typical use |
|---|---|---|---|
| Blue zinc plated | Electroplated zinc layer | Build-up on both threads; gauged after plating | Indoor assemblies and general electronics |
| Clear zinc plated | Electroplated zinc, bright finish | Same build-up; gauged after plating | Parts where colour must stay neutral |
| Nickel plated | Hard, decorative layer | Thin build-up; threads checked after plating | Visible hardware and handling-contact parts |
| Black oxide | Conversion coating, minimal thickness | No measurable build-up | Parts that must stay dimensionally tight |
| Dacromet flake | Zinc-aluminium flake layer | Thin film; threads checked over the coating | Wet or outdoor carbon steel assemblies |
Salt-spray exposure is agreed per project and written on the drawing; the plated male-female round standoff is tested in the condition it ships in, not after a cleaning step that will not happen in service. Thickness readings are taken on the body, away from the thread, so the gauge does not mark the flank.
Packing protects the threads at both ends. Standoffs are packed in layers or in tubes so the male stud and the female mouth do not knock against each other, and the label carries the batch and the plating run.
Three assembly conditions where a male-female round standoff sets a gap and takes a screw from the outside, and what it has to do instead:
Electronics stacks and PCB mounting
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Electronics – standoffs setting the board gap |
Instrumentation panels and sub-assemblies
|
Instruments – standoffs setting cover height |
Self-service equipment and machine frames
|
Kiosks and machine frames – standoffs in sheet-metal |
Four reasons that matter specifically on a male-female round standoff, each tied to what the drawing has to prove:
|
Engineering review before the bar is cut
Thread sizes at both ends, body length and female depth are settled before turning starts, so the first sample is measured against the drawing instead of against a guess. Basis: Drawing or sample reviewed before turning starts. |
Turned one-piece, both threads on one axis
The body, male thread and female hole are produced in one set-up, so the two threads stay on the same axis and the standoff sits square between the surfaces. Basis: One-piece turning route, both ends threaded in one set-up. |
|
Threads gauged after plating
Both threads are checked with gauges in the plated condition the customer receives, so the zinc layer is inside the fit rather than outside the specification. Basis: Threads gauged after zinc plating. |
First article to repeat production
The first article fixes the drawing revision, material heat and turning set-up; repeat orders are compared against that record. Basis: First article signed off before the batch is released. |
These male-female round standoffs are turned from carbon steel bar. The bar is cut to length, the body is turned and faced, the male thread is produced at one end, the female hole is drilled and tapped from the other, and the part is deburred before zinc plating. The operator checks the first part of every run against the drawing before the batch continues.
Material checked before the bar is cut |
Threads gauged after plating |
Between runs the lathe is set to the drawing body diameter and thread sizes; the first part goes to the gauges before the run continues, and the setting is recorded. Plated parts are gauged again after the zinc line, so the record covers both the machined and the finished condition.
What decides whether a male-female round standoff passes is not its appearance: it is the overall length over the body, the depth and fit of both threads, and the plating thickness in the condition it ships in. The inspection agreement covers those, and the criteria are the ones written on the drawing rather than a generic standard.
Thread gauging against GO/NO-GO gauges |
Length and body profile on the optical projector |
Hardness testing of the base material |
Salt-spray testing of the zinc coating |
Each batch is recorded against the drawing revision: length and body diameter from the first article, both threads gauged after plating, and the plating thickness taken on the body. If a gauge or the coating check fails, the parts back to the last good setting are held and re-checked before anything ships.
Where a third-party report is required for the material or the plating, it is listed on the drawing so the paperwork ships with the parts, and the batch number on the label matches the record used for the gauge.
Every male-female round standoff shipment is traceable to the bar it was made from. The grade, heat number and standard are recorded on the material certificate supplied with the parts, and the inspection records follow the criteria agreed on the drawing.
ISO 9001:2015 |
RoHS test report |
Registered trademark |
Patent: security screw and driver |
With each batch we supply the material certificate, the inspection record for the criteria on the drawing and, where it is listed, the third-party report for the material or the plating. The documents carry the drawing revision and the batch number, so the paperwork can be matched to the parts.
More than 8,678 customers in 89 countries and regions have ordered from Shi Shi Tong; 87% of orders come from repeat customers and 56% through referrals. Most projects follow the same route: drawing review, first-article approval, then batches checked against that sample. Buyers visit during the process to review samples and to see the turning, threading and plating steps their parts will go through.
|
8,678+
customers served
|
87%
of orders from repeat customers
|
56%
of orders through referrals
|
89
countries and regions shipped to
|
Buyers and quality engineers visit for sample review, process discussion and supplier audits; the visit is arranged around production so the turning cells, the thread production and the plating line can be seen on the day the parts run.
Customer group visit – sample review |
Customer group visit – process discussion |
Customer group visit – factory tour |
Customer visit – project kick-off |
Danish customer – drawing review |
Industry exhibition – meeting customers |
It is a cylindrical spacer with a threaded male stud on one end and a tapped female hole in the other. The male stud goes into a base or a bracket, the female end accepts a screw from the outside, and the body length sets the gap between the two surfaces.
There is no slot or socket on the round cap. The male-female round standoff is run down by hand and finished with a clamp or a stud driver, or it is tightened by the screw entering the female end, depending on how the assembly is built.
Thread sizes run from M2 to M12 and body lengths from a few millimetres to 200 mm, usually held to +/-0.1 mm. Where a longer version is required, custom lengths up to 2,000 mm are subject to DFM review after drawing submission.
Yes. Blue zinc adds thickness to both threads, so the thread class is specified with the plating and gauged after plating, in the condition the customer receives.
It depends on the thread sizes and the body length. The drawing states both thread depths and the minimum solid section between them, and the check confirms the wall before a batch is released.
Thread size and pitch at each end, male thread length, female depth, overall length and body diameter, which end is male, material grade, plating thickness and salt-spray requirement, and quantity.
How a male-female round standoff project runs from drawing to repeat delivery:
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1
Send the drawing or sample
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→ |
2
DFM review and quotation
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→ |
3
First article approval
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→ |
4
Batch production and repeat orders
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Each step is confirmed with you before the next one starts; the drawing revision from the first article is what repeat orders are checked against.
For a male-female round standoff quotation, send the drawing with thread sizes at both ends, male thread length, female depth, overall length and body diameter, which end is male, material grade and plating. Both threads and the wall between them are confirmed with you before production.
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Thread sizes at both ends
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Male thread length
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Female thread depth
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Overall length and body diameter
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Material grade
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Plating and quantity
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Sending a drawing? The form below does not take attachments. Email the PDF, DXF or STEP file to sst@szsst88.com with the part name and quantity in the subject line – the drawing is reviewed and a quotation follows.
+86 13143444311
sst@szsst88.com
