Standard Sizes (40 options)
Popular Sizes
| Part # | Use On | ID (in.) | OD (in.) | Length (in.) | Qty/Bag | Price/Bag | Add to Shopping List |
|---|---|---|---|---|---|---|---|
| EC070 | 2-56, M2 | 0.070 | 0.170 | 1 | 1000 | $44.31 | |
| EC093 | 0.093 | 0.195 | 0.75 | 1000 | $36.33 | ||
| EC100 | 4-40, M3 | 0.100 | 0.200 | 1 | 1000 | $43.57 | |
| EC109 | 0.109 | 0.215 | 0.75 | 1000 | $41.69 | ||
| EC125-0500 | 6-32, 6-36 | 0.125 | 0.250 | 0.50 | 1000 | $33.27 | |
| EC125 | 6-32, 6-36 | 0.125 | 0.250 | 1 | 1000 | $41.69 | |
| EC140 | 0.140 | 0.265 | 1 | 1000 | $47.18 | ||
| EC148 | M4 | 0.148 | 0.268 | 1 | 1000 | $52.54 | |
| EC156 | 8-32, 8-36 | 0.156 | 0.280 | 1 | 1000 | $47.18 | |
| EC172 | 10-24, 10-32 | 0.172 | 0.292 | 1 | 1000 | $52.54 | |
| EC180 | M5, 3/16" TUBE | 0.180 | 0.300 | 1 | 1000 | $52.54 | |
| EC187 | 0.187 | 0.315 | 1 | 1000 | $57.90 | ||
| EC218 | 0.218 | 0.338 | 1 | 500 | $29.67 | ||
| EC223 | M6 | 0.223 | 0.343 | 1.50 | 500 | $33.66 | |
| EC234 | 1/4-20, 1/4" TUBE | 0.234 | 0.354 | 1 | 500 | $32.35 | |
| EC250 | 0.250 | 0.370 | 1 | 500 | $32.35 | ||
| EC281 | 5/16-18, 5/16" TUBE | 0.281 | 0.400 | 1 | 500 | $32.35 | |
| EC295 | M8 | 0.295 | 0.415 | 1.50 | 500 | $39.08 | |
| EC355 | 3/8-16, 3/8" TUBE | 0.355 | 0.475 | 1.50 | 500 | $56.59 | |
| EC375 | M10 | 0.375 | 0.495 | 1 | 500 | $39.08 | |
| EC406 | 7/16" TUBE | 0.406 | 0.531 | 1 | 500 | $44.44 | |
| EC437 | 0.437 | 0.565 | 1 | 500 | $47.12 | ||
| EC456 | M12 | 0.456 | 0.576 | 1.50 | 500 | $57.90 | |
| EC468 | 1/2" THREAD (tight) | 0.468 | 0.593 | 1 | 500 | $66.00 | |
| EC500 | 1/2" TUBE | 0.500 | 0.625 | 1.50 | 500 | $68.68 | |
| EC535 | M14 | 0.535 | 0.635 | 1.50 | 250 | $36.33 | |
| EC600 | M16 | 0.600 | 0.708 | 1.50 | 250 | $36.33 | |
| EC625 | 0.625 | 0.750 | 1.50 | 250 | $39.08 | ||
| EC687 | 0.687 | 0.812 | 1.50 | 250 | $40.39 | ||
| EC750 | 0.750 | 0.875 | 1.50 | 250 | $47.12 | ||
| EC875 | 0.875 | 1.000 | 1.50 | 250 | $47.12 | ||
| EC937 | 0.937 | 1.062 | 1.50 | 250 | $57.90 | ||
| EC1000 | 1.000 | 1.125 | 1.50 | 250 | $90.18 | ||
| EC1062 | 1.062 | 1.187 | 1.50 | 100 | $37.69 | ||
| EC1125 | 1.125 | 1.250 | 1.50 | 100 | $36.35 | ||
| EC1187 | 1.187 | 1.312 | 1.50 | 100 | $36.35 | ||
| EC1250 | 1.250 | 1.375 | 1.50 | 100 | $40.39 | ||
| EC1500 | 1.500 | 1.625 | 1 | 100 | $44.43 | ||
| EC1750 | 1.750 | 1.875 | 2 | 50 | $74.04 | ||
| EC1875 | 1.875 | 2.000 | 2 | 50 | $84.81 |
Technical Specifications
Properties
Application Tips
Sizing as Cap
Sizing as Plug
Release Trapped Air
Sizing as Cap
ID should be 2% to 5% smaller than the thread or stud diameter.
Sizing as Plug
OD should be 4% to 7% larger than the hole diameter.
Release Trapped Air
Pierce a small hole in the end of the cap with a finishing nail or scissors to release trapped air during heat cycles.
Need a custom plug or cap?
We provide custom masking for powder coating, anodizing, plating and more.
- EPDM, silicone, FKM, Neoprene & other materials available
- Capable of handling small & large quantities
- Single cavity tooling for prototypes or small quantities
- Multi-cavity production tooling for large quantities
- Design Engineer on staff to assist with custom masking needs
Related Products
Series: SC
Silicone Straight Wall Caps
Engineered to withstand temperatures up to 600°F (315°C), these caps are highly durable, chemical resistant and 100% reusable. Over 85 standard sizes in stock for masking studs, threaded bolts, and tube ends during finishing operations.
Series: VFC
Silicone Flange Caps
Reusable masking caps designed to protect studs, bolts, and surrounding circular areas during high-heat finishing processes. Ideal for masking studs or bolts and a circular area around them, typically for grounding area protection. Our silicone flange caps eliminate the need for secondary washers by masking the circular area around the bolt, saving labor time in powder coating and e-coating lines. Alternatively can be used as a plug: The area around a hole can then be masked by the flange. They have also been used successfully as an insulation for wire harnesses (by cutting off the rounded end).
Series: SCE
Silicone Expandable Caps
Single caps that mask several different thread sizes, eliminating the need for multiple individual sizes while saving storage space. Dual-rib internal design enables expansion across multiple sizes. Rated to 600°F. For example, to mask a 1/4-20 thread and a 5/16-18 thread, two different caps would be required (our part numbers SC234 and SC281). But with just one SCE-236-354, not only can both of those sizes be masked with that one cap, but a 3/8-16 thread can be masked with it too.
Kits
Various silicone or EPDM rubber plug and cap masking kits contain small quantities of up to 24 unique part numbers. Perfect for job shops or testing new / existing parts to find the correct plugs or caps to know what parts to order. Bonus: Viadon's kits contain up to 50% more part numbers than some competitor kits.