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:Pan Phillips Screw
Materials:Carbon Steel
Surface treatment:Black Zinc Plated
Head Type:Pan Head
Drive:Phillips
Thread:Self Tapping
Point:Gimlet Point
Forming:Single Die Heading
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M14
Number:658
We make pan phillips screws in black zinc plated carbon steel with a cross recess, a coarse self tapping thread and a gimlet point, quoted from M1 to M14. Point, thread, head and plating come from your drawing, and the first article is driven into a sample of your own material.
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.
A pan phillips screw is a pan head screw with a cross recess and a self tapping thread, the most common fixing on a production line and the one most often bought to a standard rather than drawn from scratch. The recorded item on this page is black zinc plated carbon steel with a pan head and a gimlet point, quoted from M1 to M14 with Number 658.
Pan head. A low dome on a flat bearing face, sized to the standard head form. It covers the hole, bears on the panel and stays inside its own diameter.
Phillips cross. Four tapered wings around a pointed centre. The bit centres itself and cams out before the head is destroyed, which on a high-volume line is the failure mode that saves the part.
Gimlet point. A sharp, tapered point with a short run of thread behind it, made to bite into the material and start its own hole. It is not a drill point: it starts in soft material, it does not cut through steel sheet.
Black zinc. Electroplated zinc with a dark passivation. It is sacrificial like any zinc, and the dark tone is what lets the fixing disappear into a black panel.
On a pan phillips screw the pan head and the cross recess are formed in one heading stroke, so the recess is concentric and the bearing face flat. On a pan phillips screw the head form is the standard one, which means the customer’s counterbore and their driver were drawn around it: the value of the part is that it does not change from batch to batch.
The thread is rolled over the full length and the point is formed after rolling. A gimlet point is a cone of about the same angle as the thread flank, with the last few threads running down onto it; that short threaded lead is what pulls the screw into soft material once the point has started, and it is the feature that a blunt point does not have.
The point is also where a counterfeit or a cheap part shows itself. A gimlet point that has been ground after rolling leaves a lead with no thread on it, and the screw then needs pressure to start instead of pulling itself in. On a line that drives thousands a day, that difference is felt immediately.
The head and the point fail in opposite ways. A head that is too shallow cams out and marks the panel; a point that is not sharp skates, spins and tears the surface of the board. Both look like operator error from the other side of the bench, and both are decided by the tooling.
Black zinc goes on after the thread is rolled. It follows the thread, so the crest is coated, and it is thin enough that the screw still forms its own thread in the material. What the coating does not do is protect the material the screw cuts into — the hole is burned or drilled bare, and the cut edge of a coated sheet stays bare steel whatever the screw is finished with.
The family is quoted from M1 to M14, with M1, M2, M3, M4, M5, M6, M7, M8, M9, M10 and M14 in the recorded range. Custom lengths up to 2,000 mm are subject to DFM review after drawing submission; a pan phillips screw is normally short, because the thread works in a panel rather than through a stack.
| Item | How it is defined | What we control |
|---|---|---|
| Head | Pan head, standard form | Diameter, height and face flatness |
| Recess | Phillips cross | Depth and width, bit tried after plating |
| Thread | Coarse self-tapping, full length | Gauged per batch after plating |
| Point | Gimlet, sharp tip | Point angle and thread lead |
| Plating | Black zinc, dark passivation | Thickness range and salt-spray sample |
| Length | From under the head to the point | Measured on the shop plate |
Point length is quoted with the length, because on a thin material the lead is what determines whether the screw starts or spins. A point that is long relative to the thread gives a better start in soft wood and a worse grip in a thin sheet; the drawing states the lead so the part is not left to a toolmaker’s preference.
Length is measured from under the head to the point. On a screw bought to a standard the length is the whole specification once the thread and point are fixed, and a batch that is a tenth long will look identical in the box and stand out on a cured assembly.
Three features define a pan phillips screw of this form: the pan head, the cross recess and the gimlet point. The first two are commodity; the third is the one that decides which materials the screw can go into.
| Point | How it starts | Where it fits | Where it does not |
|---|---|---|---|
| Gimlet | Bites and pulls itself in | Wood, board, plastics, soft materials | Hard or thin sheet without a pilot |
| Flat | Starts in a prepared hole | Sheet metal, cored holes, moulded bosses | Soft material it cannot grip |
| Self-drilling | Drills its own hole | Sheet and light section steel | Soft materials, where it tears out |
A gimlet point is a start, not a drill. In pine or MDF it bites and pulls the screw in without a pilot, and in a moulded plastic boss it will usually start if the boss has a dimple or a short lead hole. In thin steel sheet it skates, polishes the surface and then either tears a slot or spins, and in a hard filled plastic it can split the boss.
The distinction matters when a part is quoted. A customer who asks for a pan phillips screw to a standard may mean any of the three points, and the ones that fail in service are almost always the wrong point for the material rather than a defective screw. That is why the first article is driven into a sample of the customer’s own material.
Pan phillips screws carry a black zinc finish with a dark passivation, applied after the thread is rolled. It is a sacrificial coating on a part whose job is to abrade itself into the material, which makes the finish the least durable feature of the screw.
| Finish | How it protects | Effect on point and thread | Typical use |
|---|---|---|---|
| Black zinc | Sacrificial zinc, dark passivation | A few microns; recess re-checked | Dark visible panels |
| White zinc | Sacrificial zinc | A few microns; recess re-checked | General indoor work |
| Black oxide | Thin conversion film, oiled | Almost no change | Unseen dark joints |
| Nickel plate | Hard barrier deposit | Thicker; recess re-checked | Visible decorative fixings |
| Dacromet | Zinc-aluminium flake layer, cured | Thin film; thread re-checked | Outdoor and wet assemblies |
The wear pattern is predictable. The crest of the thread is what forms the thread in the material, so it rubs through the coating within the first few millimetres of driving; the recess wears as the bit turns; the point wears where it bites. A black zinc screw that has been driven once is no longer coated where it matters, and the coating that remains is on the head and the upper thread.
That is why black zinc is chosen for looks rather than for corrosion. On a dark panel it makes the fixing disappear; in a wet or outdoor joint it is the wrong finish, and the answer is a flake coating or a different base metal rather than a heavier coat of the same.
Three assemblies where a black pan phillips screw with a gimlet point is the right fixing:
| Where it sits | The screw joins a bracket, a hinge or a fitting into particleboard or MDF where the point has to start without a pilot and the head shows. |
| When it goes wrong | A flat point will not start in board, and a coarse thread with the wrong point strips the fixing on the second fitting. |
| Why it happens | The material is soft, the fixing is visible, and the joint is made on a line. |
| What we control | Point angle and lead checked, thread driven into a sample of the board. |
| Where it sits | The screw fixes a component into a moulded boss where the thread forms in the plastic and the head sits on a dark face. |
| When it goes wrong | A point with no lead needs force to start and splits the boss; an over-tightened screw stress-cracks the plastic. |
| Why it happens | The material is a moulded polymer, the boss is thin, and the fixing repeats. |
| What we control | Point and thread checked, driving torque read in the customer’s part. |
| Where it sits | The screw closes a panel or fixes a trim where the head must not read as a bright dot on a black face. |
| When it goes wrong | A white zinc head shows from across the room, and a head that cams out leaves a bright scar. |
| Why it happens | The panel is dark, the fixing is visible, and the joint is serviced. |
| What we control | Plating tone held to the sample, recess driven with the production bit. |
Four reasons that matter on a self tapping screw with a gimlet point, each tied to what the drawing has to prove:
|
Point and material reviewed together
The point type, the thread and the material it goes into are reviewed as one set, so a screw that would skate on sheet or split a boss is raised before the batch is made. Basis: Point type and material reviewed as one set. |
Heading, rolling and pointing in one route
The pan head and the cross are formed in one stroke, the thread is rolled and the gimlet point is formed in the same route, so the lead keeps its thread. Basis: Gimlet point formed with the thread, not after it. |
|
Recess and point checked on the part
The recess is driven with the production bit after plating, and the point angle and lead are checked on the first article. Basis: First article driven into the customer material. |
First article fixes the setting
The first article fixes the wire heat, die set, roll and plating barrel; repeat orders are compared against that record. Basis: First article signed off before the batch is released. |
Shi Shi Tong heads these pan phillips screws from carbon steel wire on single-die headers that form the pan head and the cross recess in one stroke, rolls the coarse thread and forms the gimlet point so the lead keeps its thread, then black zinc plates the parts. The first part of every run is measured on the head, driven with the production bit and started in a sample of the customer’s material before the batch continues.
|
|
Forming the point after the thread rather than before is what keeps the lead threaded. A trimmer that cuts the point leaves a short plain cone at the tip, and the screw then needs pressure to start; a screw with a threaded lead pulls itself in. The difference is only visible under magnification and is decisive in soft material.
What decides whether pan phillips screws pass is the head, the recess, the thread, the point and the plating. The inspection agreement covers those, and the criteria come from the drawing.
Point angle and thread lead on the projector |
Thread gauged after plating |
Hardness testing against the property class |
Salt-spray testing of the black zinc plate |
The point is checked on the projector for angle, straightness and the length of the threaded lead. A point that is off centre starts the screw at an angle, and in soft material the hole does not straighten it: the board tears along the line the screw took.
The recess on a pan phillips screw is driven with the production bit after plating, and the head is checked for diameter, height and face flatness. On a black head a cam-out shows as a bright cross, which is also the earliest sign that the driver is worn.
The thread is gauged after plating and driven into a sample of the customer’s material. Driving torque and strip torque are read together, because the failure that matters in soft material is the one where the screw turns freely and holds nothing.
Every shipment of pan phillips screws is traceable to the wire it was made from and to the plating 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 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. On pan phillips screws the first article is also driven into the customer’s material, so the point and the thread are proved against the part rather than on a test plate. Buyers visit during the process to review samples and to see how the parts 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 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 |
The gimlet point on a pan phillips screw bites and starts its own hole in wood, board and soft plastics, and the short threaded lead then pulls the screw in. It is not a drill and it does not pierce steel sheet.
Only with a pilot hole. Without one the point skates, polishes the surface and tears or spins.
The crest and the point are what form the thread, so they rub through the coating in the first few millimetres. Black zinc is for looks; it is not the corrosion answer for a wet joint.
No. The coating is on the screw. The cut or drilled surface in the material stays bare, which is why the joint, not the screw, decides whether it rusts.
The standard pan head the drawing names. A JIS pan head and a DIN pan head differ by tenths at small sizes, which matters in a shallow counterbore.
Head form and standard, recess size, thread and point type with the point lead, length and datum, material and plating thickness.
How a pan phillips screw project runs from drawing to repeat delivery:
|
1
Send the drawing or a sample of the material
|
→ |
2
Point, thread and head review
|
→ |
3
First article driven into your material
|
→ |
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 with the head form and standard, the recess size, the thread and point type with the point lead, the length and datum, and the material and plating.
|
Head form
|
Recess size
|
Thread and point
|
|
Point lead
|
Length
|
Material and plating
|
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
