Assembly Screws & SEMS Screws

---

SEMS combines two normally seperate parts-typically a screw and a washer- into one permanently pre-assembled cost saving component. Washers are hel in place under the screw head by the rolled threads; they will not fall off and are free to rotate. Assembly screws were specially designed for assembly and installation of cabinets or other types of box construction. These unique fasteners act like steel dowels to form strong, stiff butt joints. The screws feature a large shoulder under the head to lock the screw into the wood and prevent pulling through into softer materials. These screws can be removed and reinstalled several times without loss of holding power.

---

Chamfered Hex Washer Head

SA009-150505-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing and assembly All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector Screw Measurement Points: Across the flat and corner, Washer diameter, Washer height, Length, Head height, Major diameter, Minor diameter, Thread angle, Pitch, Drilling tapping diameter, Drilling tapping length EPDM Measurement Points: Outside diameter, Height, Rec diameter

---

Custom Chamfered Hex Washer Head

SE003-150813-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing and assembly All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector Screw Measurement Points: Across the flat and corner, Washer diameter, Washer height, Length, Major diameter, Minor diameter, Thread angle, Pitch, Length of the pointed tail EPDM Measurement Points: Outside diameter, Height, Rec diameter

---

Pan Head Plus Washer

SF002-150305-1

---

Process: Screw head shaping, thread rolling and washer molding before heat treating All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector, 3 Wire gage, Inspection gage Measurement Points: Head diameter, Head height, Rec penetration gaging depth, Length, Value C and D, Thread angle, Pitch Flat Washer Measurement Points: Outside diameter, Height, Rec diameter

---

Pan Head Screw

SF008-150522-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector, Recess Penetration Gage, Ring gage Screw Measurement Points: Head diameter, Head height, Rec penetration depth, Major diameter, Thread angle, Pitch Washer Measurement Points: Outside diameter, Height, Rec diameter

---

Directly Cut Chamfered Hex Washer Head

SG005-140902-1

---

Process: Screw head shaping, thread rolling and washer molding before heat treating All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector, Recess Penetration Gage, M5 Ring gage Screw Measurement Points: Across the flat and corner, Washer diameter, Washer height, Thread cutting width, Thread cutting depth, Length, Head height, Major diameter, Minor diameter, Thread angle, Pitch, Drilling tapping length, Drilling tapping diameter EPDM Measurement Points: Outside diameter, Height, Rec depth

---

Chamfered Hex Head

SM006-121122-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector, Recess Penetration Gage, M5 Ring gage Measurement Points: Across the flat, Across the corner, Head height, Length, Major diameter, Thread angle, Pitch A2 Washer Measurement Points: Outside diameter, Height, Rec diameter

---

Chamfered Hex Screw

SM006-150610-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector, Recess Penetration Gage Screw Measurement Points: Across the flat and corner, Head height, Rec penetration, Length, Major diameter, Thread angle, Pitch, Minor diamete A2 Washer Measurement Points: Outside diameter, Height, Rec diameter

---

Chamfered Hex Washer Screw

SP002-150611-1

---

Process: Screw head shaping, thread rolling and washer molding before acid washing and assembly All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector Screw Measurement Points: Across the flat and corner, Head height, Length, Major diameter, Thread angle, Pitch, Minor diameter, Angle of the pointed tail A2 Washer Measurement Points: Outside diameter, Height, Rec diameter

---

Button Head Internal Hex Rec

CM006-150412-2

---

Process: Using multi blow header to make the head and then threading before passivation, then assembling the screw and washer. At last surface coating All the items are inspected during the process and before shipping, complying with ISO Working Instruction Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector Measurement Points: Head diameter, Head height, Hex depth, Hex plug gauge, Washer diameter, Washer height, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Ring gage GO /NO GO Nylok Inspection Nylok Coating Reports Offered

---