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1/4-20×7/8 Fillister Head Slotted Machine Screws 18-8 Stainless steel
₨100.00
1/4-20×7/8 Fillister Head Slotted Machine Screws 18-8 Stainless steel
The 1/4-20 × 7/8 inch Fillister Head Slotted Machine Screw is a corrosion-resistant threaded fastener designed for securing metal, plastic, wood, or composite components where a high-profile cylindrical head is preferred. The fillister head provides greater driving surface and increased head strength compared to a pan head, while the slotted drive allows installation using a standard flat-blade screwdriver.
10 in stock
Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Fastener Type | Machine Screw |
| Thread Size | 1/4-20 UNC |
| Thread Diameter | 0.250 in (6.35 mm) |
| Thread Pitch | 20 TPI (1.27 mm pitch) |
| Length | 7/8 in (22.23 mm), measured from underside of head |
| Head Style | Fillister Head |
| Drive Type | Slotted |
| Thread Type | Unified National Coarse (UNC) |
| Material | 18-8 Austenitic Stainless Steel |
| Finish | Plain, natural stainless steel |
| Corrosion Resistance | Excellent for indoor and outdoor environments |
| Magnetic Properties | Generally non-magnetic (may become slightly magnetic after cold working) |
| Standard | Commonly manufactured to ASME B18.6.3 machine screw dimensions |
| Strength | Comparable to ASTM F593 Group 1 (varies by manufacturer) |
Material Properties (18-8 Stainless Steel)
- Composition: Approximately 18% Chromium, 8% Nickel
- Good resistance to rust, oxidation, and many chemicals
- Suitable for humid, marine, and industrial environments
- Operating temperature: Approximately −196°C to +870°C (application dependent)
- Good mechanical strength and toughness
Fillister Head Features
- Tall cylindrical head with a slightly rounded top
- Deeper slot than standard round-head screws
- Larger bearing surface than round-head screws
- Provides increased tightening torque
- Ideal where the screw head remains visible
Typical Applications
- Electrical and electronic equipment
- Industrial machinery
- Aircraft ground support equipment
- Control panels and enclosures
- Instrument assemblies
- Marine hardware
- Laboratory equipment
- Maintenance, repair, and overhaul (MRO)
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