Steel Pan Head Screws
with Internal-Tooth Lock Washer, 6-32 Thread, 1/4" Long
Locking Type | Lock Washer |
Thread | |
Size | 6-32 |
Direction | Right Hand |
Spacing | Coarse |
Type | UNC |
Fit | Unified Standard Class 2A |
Tip Type | Flat |
Fastener Head Type | Rounded |
Head | |
Style | Pan |
Profile | Standard |
Height | 0.097" |
Diameter | 0.27" |
Drive | |
Style | Phillips |
Size | No. 2 |
Tooth Location | Internal |
Washer | |
Type | Tooth |
Material | Zinc-Plated Steel |
OD | 0.288" |
Thickness | 0.021" |
Material | Zinc-Plated Steel |
Length | 1/4" |
Threading | Fully Threaded |
Tensile Strength | 60,000 psi |
Specifications Met | ASME B18.13 |
Hardness | Rockwell B69 |
Performance | Vibration Resistant |
Screw Size Decimal Equivalent | 0.138" |
System of Measurement | Inch |
Country of Origin | United States |
DFARS Compliance | Specialty Metals COTS-Exempt |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (06/25/2025, 250 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 731815.9000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Sharp internal teeth hold screws in place despite frequent movement and vibration. These screws have a washer with teeth that dig into surfaces to prevent loosening. Unlike external-tooth lock washers, their smooth outside edge provides a finished look and won't snag on surrounding objects. Also known as Sems screws, the washer rotates freely but is permanently attached. These screws have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads. The Phillips drive easily aligns with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.
Length is measured from under the head.
Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
The information in this 3-D model is provided for reference only.