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White plastic spray gun cup lid with 1/8 inch male BSP thread

3M

3M Spray Gun Cup Lid S31 Type 1/8" Male 28 Thread (BSP) Plastic 26127

SKU CH-XFDR-Z9EQD

A plastic spray gun cup lid with 1/8" male 28-thread BSP fitting for S31 type paint sprayers

  • Product typePaint Sprayer Accessories
  • Size or dimensions1/8 in Male, 28 Thread (BSP)
  • Fits S31 spray guns with 1/8" male 28-thread BSP connection
  • Durable plastic lid protects cup contents during paint spraying tasks
  • 3M accessory designed for reliable pressure washer compatibility
  • Standard BSP threading ensures secure fit on matching equipment
  • Listed by manufacturer since February 2020 for proven availability

Spray Gun Cup Lid S31

This replacement lid fits 3M S31 type spray gun cups. It is intended for painters and technicians who need a secure closure for their existing cup assembly. The plastic construction keeps the part lightweight and resistant to common solvents. Buyers who need a different thread pattern or a metal lid will not find a match here.

1/8 Inch Male BSP Thread Limit

The lid uses a 1/8 inch male connection with 28 threads per inch to BSP standard. This threading determines whether the lid will seal on your cup; mismatched pitch or diameter will cause leaks. No adapter or alternative thread form is included in the package.

S31 Type Compatibility

The single specification that decides fit is the S31 type designation. Only cups marked as S31 accept this lid; other 3M cup series use different sealing geometry. Verify the cup marking before ordering to avoid an unusable part.

How it compares

Measured against everything we stock in Power Washers & Surface Cleaners, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 79% of the 49 comparable items (median $47.99).

Specifications

Product
Brand name3m
Product typePaint Sprayer Accessories
Size & build
Size or dimensions1/8 in Male, 28 Thread (BSP)

Questions about this item

Which S31 type cup lid fits my spray gun with a 1/8" male BSP thread?

This lid is made for S31 type spray guns and has a 1/8" male fitting with 28 threads per inch BSP, so it matches guns using that exact thread specification.

How does the 1/8" male 28 thread BSP connection perform when the sprayer is under pressure?

The 1/8" male BSP thread with 28 threads per inch creates a secure seal on compatible S31 type spray guns, preventing leaks during normal paint spraying operation.

What does the 28 thread BSP standard mean for compatibility with other fittings?

The 28 thread BSP designation means this lid only fits components cut to the same British Standard Pipe thread pitch; it will not seal on NPT or other thread standards.

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