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:Tiny Screws for Sale: Stainless Pan Head Screws
Materials:Stainless Steel
Surface treatment:Plain
Head Type:Pan Head
Drive:Phillips (cross)
Thread:Machine thread, full thread
Point:Blunt
Forming:Single Die Heading
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M14
Number:756
We make small stainless pan head screws in passivated A2, with a domed head, a bearing ring and a full machine thread, quoting them from M1 to M14. Thread size, under-head length, head dimensions, recess and grade come from your drawing or size list.
Watch the factory video·Email sst@szsst88.com
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.
These are small stainless pan head machine screws with a Phillips recess, made from A2 stainless with a plain passivated finish and quoted from M1 to M14 with Number 756. They are the general-purpose miniature screw of the catalogue: a domed head with a real bearing ring, a full machine thread and a cross recess.
Pan head. A low dome with a slightly wider diameter than a cheese head, so the bearing face is a ring under the head rather than a narrow edge.
Phillips cross recess. A PH000 to PH0 recess depending on size, driven with the matching bit.
Full machine thread. The thread runs to the underside of the head, so the screw grips along its whole engaged length.
Passivated stainless. A2 grade, uncoated, so the recess and the thread are as made and the alloy is the protection.
Stainless pan head screws are the part most small assemblies start with: they sit flat enough not to be in the way, they spread the clamp load over a ring, and there is nothing on them that a normal hand tool cannot drive.
A pan head is held by the ring underneath it. The dome above is mostly shape and clearance; the flat annulus between the head edge and the shank is where the clamp load passes into the part. That ring is why stainless pan head screws are used on thin sheet, composite and plastic panels where a countersunk or narrow head would cut in.
The width of the ring follows the head diameter, and the head diameter is fixed by the standard for each thread. Two suppliers can both supply an M2 pan head and differ in head height and in the radius where the head meets the shank; the head height changes how much recess is left in a shallow pocket, and the radius changes how the load enters a brittle part.
The thread running to the head is the other half of the design. On a screw that is used in a tapped hole or a nut, full thread means every engaged turn carries load; on a screw used in a thin sheet with a nut behind it, full thread means the nut can come all the way up. A partial thread on the same part would leave a plain shank under the head and stop the nut short.
The recess is cut into a head that is already low, so its depth is limited by the head height. On M1.2 the head is about 0.8 mm tall and the cross is cut to a fraction of that; the bit engagement is short, the driver has to be in good condition, and the torque is set for the recess rather than for the thread.
What the form does not do is locate. A pan head sits on a flat face and finds its own position, so a joint that needs centring uses a shoulder or a countersink instead. Where stainless pan head screws are used, the hole tolerance does the locating and the head only clamps.
The recorded range is M1 to M14, with M1, M1.2, M1.4, M1.6, M2, M2.5 and M3 covering most small assemblies. Custom lengths up to 2,000 mm are subject to DFM review after drawing submission. For stainless pan head screws the size code is read before anything else, because most order errors are a length read the wrong way.
| Item | How it is defined | What we control |
|---|---|---|
| Thread size | M1.2 means 1.2 mm major diameter | Major and pitch diameters, gauged |
| Length | Under the head, not overall | Length tolerance and end chamfer |
| Head | Pan, domed, per standard | Head diameter and head height |
| Recess | Phillips cross | Recess size and depth |
| Thread | Machine thread to the head | Pitch, thread length and gauging |
| Material | A2 stainless | Grade and heat number on the certificate |
| Finish | Passivated | Surface condition and film |
Length on a pan head is measured under the head. A 3 mm M1.2 screw is 3 mm from the underside of the head to the end of the thread, so the assembled height is the head height plus 3 mm plus whatever it passes through; a drawing that gives overall length will produce a screw one head height short.
Thread size and head size are linked: the standard gives the head diameter for each thread, and the head grows with the screw. A customer who wants a wider head for a soft panel is asking for a different head form, not a different pan head, and that is worth settling before the order.
Three features define the part: the pan head and its ring, the cross recess and the full machine thread. The first clamps without cutting into the panel, the second is the drive available on a low head, and the third uses every engaged turn.
| Feature | What it gives | What it costs |
|---|---|---|
| Pan head ring | Spreads clamp load on thin parts | Head sits above the surface |
| Domed top | Smooth, nothing to catch | Head height limited by the dome |
| Cross recess | Common tool, quick drive | Cam-out with a worn bit |
| Full thread | Every engaged turn carries load | No plain shank to locate |
| Passivated A2 | No plating build in the recess | Softer than steel; galls dry |
The ring is the practical advantage of stainless pan head screws over a cheese head or a low profile head on thin material. A narrow bearing face dimples a plastic panel long before the joint is tight, and a wider pan head spreads the same load over more area without adding a washer.
The cost is height. A pan head stands above the surface by its full height, which matters where a cover has to sit flush; in that case the answer is a countersunk or low profile head, not a pan head with the dome removed.
The recorded finish is passivation with no coating on A2 stainless. For stainless pan head screws that is the sensible default: the recess and the thread stay at the size the drawing gives, the part does not need a coating to survive ordinary indoor and outdoor service, and there is no plating thickness to re-check after the fact.
| Option | How it protects | Effect on recess and thread | Typical use |
|---|---|---|---|
| A2 stainless, passivated | Passive chromium oxide film | None; as made | General assemblies |
| A4 stainless, passivated | Passive film with molybdenum | None; as made | Marine and chemical |
| Steel, zinc plated | Sacrificial zinc | Build re-checked at the recess | Indoor low-cost work |
| Steel, black oxide | Conversion film, oiled | No measurable build | Internal mechanisms |
| Brass, plain | No coating needed | Softer head; recess wears | Electrical and decorative |
The A2 and A4 choice follows the environment. A2 handles ordinary exposure; A4 is the grade where chlorides are present, which for a small screw usually means a marine fitting or a washdown assembly rather than a coastal structure.
Where the joint is tightened many times, a plated steel screw loses its recess first; stainless keeps the cross sharper because there is no soft deposit to rub away, but it galls against stainless if the thread is driven dry.
Three assemblies where stainless pan head screws are the fixing:
| Where it sits | The screw closes a housing or a bracket where the panel is thin and the load has to be spread without a washer. |
| When it goes wrong | A narrow head dimples the panel, and a worn bit rounds the cross before the joint is tight. |
| Why it happens | The joint is thin, it is assembled in volume, and the head is visible. |
| What we control | Head diameter and recess depth checked; first article driven at the assembly torque. |
| Where it sits | The screw fixes a faceplate or a printed board stand-off where the head must sit flat and stainless is required. |
| When it goes wrong | The screw backs out, or a coarse head height leaves the plate standing proud. |
| Why it happens | The joint is machined, it is inspected, and the material must be stainless. |
| What we control | Head height held to tolerance, thread gauged per batch. |
| Where it sits | The screw retains a cover or a linkage part where the joint is opened for service and the thread has to survive repeated use. |
| When it goes wrong | Repeated driving wears the recess, and a dry stainless thread galls in the tapped hole. |
| Why it happens | The joint is serviced, it is small, and it is tightened by hand. |
| What we control | Recess checked after passivation, assembly lubricant specified where needed. |
Four reasons that matter on a catalogue screw, each tied to what the drawing has to prove:
|
Size code and head agreed
Thread size, under-head length, head diameter and head height are confirmed against the print, because those four numbers are what a pan head is ordered by. Basis: Size code and head confirmed. |
Headed, threaded, passivated in one route
The pan head and cross recess are formed in one stroke, the full thread is rolled and the parts are passivated in the same route. Basis: One route from wire to passivated screw. |
|
Recess and thread gauged
The recess is checked for size and depth and the thread gauged per batch, because the recess is what the customer drives and the thread is what holds. Basis: Recess and thread gauged. |
Same head height next time
The first article fixes head height and recess depth, and repeat orders are measured against that record rather than against a catalogue. Basis: First article fixes the head. |
Shi Shi Tong forms stainless pan head screws from A2 wire on single-die headers that form the domed head and cut the Phillips recess in one stroke, rolls the full machine thread to a blunt chamfered end and passivates the parts. The first part of every run is measured on head diameter, head height, recess depth and thread before the batch continues.
|
|
The head is the part of a pan head screw that shows a worn tool. The punch has to form a dome and a flat bearing ring in one hit, and a punch that has seen too many parts leaves the ring slightly rounded and the dome slightly high; the screw still measures inside its diameter, and it no longer sits flat on a machined face.
What decides whether stainless pan head screws pass is the head diameter and height, the bearing face, the recess and the thread. For stainless pan head screws the inspection agreement covers those four, and the criteria come from the drawing.
Head and recess on the projector |
Thread gauged per batch |
Hardness checked on the wire |
Salt-spray testing of the grade |
The head is checked for diameter and height on the projector, the bearing face for flatness, and the recess for size and depth. The thread is gauged per batch, and the grade is confirmed on the mill certificate rather than by appearance.
For orders that go into an assembly line, the first article is also driven with the customer’s bit at the production torque, because a cross recess that measures correctly can still cam out with a worn driver.
Every shipment of stainless pan head screws is traceable to the wire it was made from and to the passivation batch. The grade and heat number 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 grade or the passivation. The documents carry the drawing revision and the batch number, so a repeat order is made to the same head geometry that was approved.
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. On a standard screw the first article is the reference for head height and recess depth, and every repeat order is compared with it. Buyers visit during the process to review samples and to see how the heads are formed.
|
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 headers and the passivation 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 |
Under the head, not overall. An M1.2 × 3 screw is 3 mm from the underside of the head to the end of the thread.
The pan head spreads the load on a ring and cannot cut into the panel. A countersunk head sits flush, but it needs a matching seat.
Yes. The thread runs to the underside of the head, which is what allows a nut to come all the way up.
PH000, PH00 or PH0 depending on the size, in good condition. A worn bit rounds the cross before the thread is loaded.
A2 covers ordinary exposure. For chlorides, specify A4.
Thread size, under-head length, head diameter and height, recess size and depth, the standard, the grade and the torque the joint will use.
How a small screw project runs from drawing to repeat delivery:
|
1
Send the drawing or the size and quantity
|
→ |
2
Thread, under-head length and head agreed
|
→ |
3
First article approved against the print
|
→ |
4
Batch production and repeat orders
|
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 quotation, send the drawing or the size list with the thread size, under-head length, head diameter and height, the grade and the quantity.
|
Thread size
|
Under-head length
|
Head diameter
|
|
Head height
|
Grade
|
Quantity
|
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
