Mil. Spec. Phillips Rounded Head Screws
18-8 Stainless Steel, 4-40 Thread Size, 1/4" Long
Thread | |
Size | 4-40 |
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 | 0.08" |
Diameter | 0.219" |
Drive | |
Style | Phillips |
Size | No. 1 |
Length | 1/4" |
Threading | Fully Threaded |
Tensile Strength | 80,000 psi |
Specifications Met | Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35 |
Military Specification | MS51957-13 |
Certification | Mil. Spec. |
Hardness | Not Rated |
Material | 18-8 Stainless Steel |
Passivation | Passivated |
Performance | Corrosion Resistant |
Screw Size Decimal Equivalent | 0.112" |
System of Measurement | Inch |
Country of Origin | United States |
DFARS Compliance | Specialty Metals Compliant (252.225-7009) |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (01/21/2025, 247 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 731815.9000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
These stainless steel pan head Phillips screws won't rust or corrode when exposed to moisture and chemicals. They 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.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.
The information in this 3-D model is provided for reference only.