Electromechanical – Mouser United Kingdom

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Self-Sealing Hardware

APM HEXSEAL Self-Sealing Hardware features fasteners and washers, including SEELSKREWS®, SEELBOLTS®, SEELNUTS®, and SEELOC® WASHERS. This reusable hardware offers positive sealing under pressure or vacuum and resists loosening due to vibration. Optional O-ring seal materials assure performance with a wide variety of gasses and liquids. APM HEXSEAL Self-Sealing Hardware is easy to install, compatible with all surface finishes, and tested and listed to UL Standard 50, Types 1-13.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
Screws & Fasteners M2.5X6MM, Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw RM2.5x6MM 2701 APM HEXSEAL 1: £0.751 5,626In Stock	Mfr. Part No. RM2.5x6MM 2701 Mouser Part No 608-RM2.5X6MM2701	APM HEXSEAL	Screws & Fasteners M2.5X6MM, Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw		5,626In Stock	£0.751 £0.583 £0.455 £0.437 View £0.415 £0.395 £0.382 £0.367	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW FH REC 4-40 THD 5/16 SFR4-40X5/16 2701 APM HEXSEAL 1: £0.661 4,243In Stock	Mfr. Part No. SFR4-40X5/16 2701 Mouser Part No 608-SFR440X5162701	APM HEXSEAL	Screws & Fasteners SEELSKREW FH REC 4-40 THD 5/16 Learn More about APM HEXSEAL self sealing hardware		4,243In Stock	£0.661 £0.507 £0.462 £0.407 View £0.395 £0.354 £0.346	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW STD PH REC 4-40 THD 3/16"LG R4-40X3/16 2701 APM HEXSEAL 1: £0.661 7,911In Stock	Mfr. Part No. R4-40X3/16 2701 Mouser Part No 608-R4-40X3/162701	APM HEXSEAL	Screws & Fasteners SEELSKREW STD PH REC 4-40 THD 3/16"LG		7,911In Stock	£0.661 £0.523 £0.443 £0.407 View £0.376 £0.357 £0.339 £0.329 £0.313	Min.: 1 Mult.: 1
Screws & Fasteners 4-40X5/16", Phillips Pan Head, 18-8 Stainless Steel with Fluoro-Silicone O-Ring, Seal Screw R4-40X5/16 2615 APM HEXSEAL 1: £0.743 6,150In Stock	Mfr. Part No. R4-40X5/16 2615 Mouser Part No 608-R4-40X5/162615	APM HEXSEAL	Screws & Fasteners 4-40X5/16", Phillips Pan Head, 18-8 Stainless Steel with Fluoro-Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	6,150In Stock	£0.743 £0.582 £0.533 £0.471 View £0.437 £0.415 £0.395 £0.382 £0.367	Min.: 1 Mult.: 1
Screws & Fasteners 4-40X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R4-40X9/16 2701 APM HEXSEAL 1: £0.736 3,230In Stock	Mfr. Part No. R4-40X9/16 2701 Mouser Part No 608-R4-40X9/16	APM HEXSEAL	Screws & Fasteners 4-40X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	3,230In Stock	£0.736 £0.567 £0.472 £0.442 View £0.422 £0.40 £0.379 £0.368 £0.351	Min.: 1 Mult.: 1
Screws & Fasteners 2-562X3/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R2-56X3/4 2701 APM HEXSEAL 1: £0.89 297In Stock	Mfr. Part No. R2-56X3/4 2701 Mouser Part No 608-R2-56X3/4	APM HEXSEAL	Screws & Fasteners 2-562X3/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware		297In Stock	£0.89 £0.70 £0.537 £0.53 View £0.515 £0.501 £0.492 £0.483	Min.: 1 Mult.: 1
Screws & Fasteners 2-562X5/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R2-56X5/16 2701 APM HEXSEAL 1: £0.89 1,060In Stock	Mfr. Part No. R2-56X5/16 2701 Mouser Part No 608-R2-56X5/16	APM HEXSEAL	Screws & Fasteners 2-562X5/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	1,060In Stock	£0.89 £0.70 £0.639 £0.566 View £0.53 £0.515 £0.501 £0.492 £0.483	Min.: 1 Mult.: 1
Screws & Fasteners METRIC PAN HEAD WITH SLOTTED DRIVE 6MM SM3X6MM-2701 APM HEXSEAL 1: £0.571 1,758In Stock	Mfr. Part No. SM3X6MM-2701 Mouser Part No 608-SM3X6MM-2701	APM HEXSEAL	Screws & Fasteners METRIC PAN HEAD WITH SLOTTED DRIVE 6MM Learn More about APM HEXSEAL self sealing hardware		1,758In Stock	£0.571 £0.445 £0.406 £0.358 View £0.351 £0.313 £0.306	Min.: 1 Mult.: 1
Screws & Fasteners 2-562X3/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R2-56X3/8 2701 APM HEXSEAL 1: £0.89 297In Stock	Mfr. Part No. R2-56X3/8 2701 Mouser Part No 608-R2-56X3/8	APM HEXSEAL	Screws & Fasteners 2-562X3/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	297In Stock	£0.89 £0.722 £0.613 £0.566 View £0.491 £0.41	Min.: 1 Mult.: 1
Screws & Fasteners SFR832X3/8 2701 APM HEXSEAL 1: £0.676 100In Stock	Mfr. Part No. SFR832X3/8 2701 Mouser Part No 608-SFR832X3/8	APM HEXSEAL	Screws & Fasteners		100In Stock	£0.676 £0.526 £0.442 £0.431 View £0.414 £0.402 £0.392 £0.386 £0.375	Min.: 1 Mult.: 1
Screws & Fasteners 1/4-20X1" 18-8 Stainless Steel Self-Seal Silicone O-Ring, Hex Cap Screw ST1/4-20X1 2701 APM HEXSEAL 1: £2.45 28In Stock	Mfr. Part No. ST1/4-20X1 2701 Mouser Part No 608-ST1/4-20X1	APM HEXSEAL	Screws & Fasteners 1/4-20X1" 18-8 Stainless Steel Self-Seal Silicone O-Ring, Hex Cap Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	28In Stock	£2.45 £1.96 £1.53 £1.52 View £1.48 £1.44 £1.41 £1.38	Min.: 1 Mult.: 1
Screws & Fasteners S/6-32X1/4 2701 APM HEXSEAL 1: £0.555 146In Stock	Mfr. Part No. S/6-32X1/4 2701 Mouser Part No 608-S/6-32X1/4	APM HEXSEAL	Screws & Fasteners Learn More about APM HEXSEAL self sealing hardware		146In Stock	£0.555 £0.396 £0.361 £0.317 View £0.292 £0.285 £0.265 £0.258 £0.25	Min.: 1 Mult.: 1
Screws & Fasteners SFR4-40 x 3/8 2701 APM HEXSEAL 1: £0.548 3,961In Stock	Mfr. Part No. SFR4-40 x 3/8 2701 Mouser Part No 608-SFR4-40X3-82701	APM HEXSEAL	Screws & Fasteners		3,961In Stock	£0.548 £0.425 £0.409 £0.318 £0.303	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 12MM SM3X12MM-2701 APM HEXSEAL 1: £0.608 511In Stock 1,000Expected 13/11/2026	Mfr. Part No. SM3X12MM-2701 Mouser Part No 608-SM3X12MM-2701	APM HEXSEAL	Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 12MM Learn More about APM HEXSEAL self sealing hardware		511In Stock 1,000Expected 13/11/2026	£0.608 £0.545 £0.312 £0.303 £0.265	Min.: 1 Mult.: 1
Screws & Fasteners 10-32X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R10-32X7/8 2701 APM HEXSEAL 1: £1.12 25In Stock	Mfr. Part No. R10-32X7/8 2701 Mouser Part No 608-R10-32X7/8	APM HEXSEAL	Screws & Fasteners 10-32X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	25In Stock	£1.12 £0.899 £0.759 £0.705 £0.495	Min.: 1 Mult.: 1
Screws & Fasteners R8-32x3/16 2701 APM HEXSEAL 1: £0.743 90In Stock	Mfr. Part No. R8-32x3/16 2701 Mouser Part No 608-R8-32X3/162701	APM HEXSEAL	Screws & Fasteners		90In Stock	£0.743 £0.579 £0.528 £0.465 View £0.431 £0.408 £0.388 £0.376 £0.359	Min.: 1 Mult.: 1
Screws & Fasteners SFR4-40 x 3/8 2615 APM HEXSEAL 1: £0.811 64In Stock 1,000Expected 30/10/2026	Mfr. Part No. SFR4-40 x 3/8 2615 Mouser Part No 608-SFR4-40X382615	APM HEXSEAL	Screws & Fasteners		64In Stock 1,000Expected 30/10/2026	£0.811 £0.636 £0.581 £0.513 View £0.476 £0.452 £0.43 £0.416 £0.40	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 8MM SM3X8MM-2701 APM HEXSEAL 1: £0.571 169In Stock	Mfr. Part No. SM3X8MM-2701 Mouser Part No 608-SM3X8MM-2701	APM HEXSEAL	Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 8MM		169In Stock	£0.571 £0.445 £0.406 £0.358 View £0.331 £0.313 £0.298 £0.289 £0.254	Min.: 1 Mult.: 1
Screws & Fasteners 2-562X3/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R2-56X3/16 2701 APM HEXSEAL 1: £0.89 302In Stock	Mfr. Part No. R2-56X3/16 2701 Mouser Part No 608-R2-56X3/162701	APM HEXSEAL	Screws & Fasteners 2-562X3/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw		302In Stock	£0.89 £0.70 £0.639 £0.566 View £0.549 £0.515 £0.501 £0.492 £0.483	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 20MM SM3X20MM-2701 APM HEXSEAL 1: £0.773 283In Stock 550Expected 13/11/2026	Mfr. Part No. SM3X20MM-2701 Mouser Part No 608-SM3X20MM-2701	APM HEXSEAL	Screws & Fasteners SEELSKREW MT PH SLOT M3 X .5 THD 20MM Learn More about APM HEXSEAL self sealing hardware		283In Stock 550Expected 13/11/2026	£0.773 £0.603 £0.469 £0.459 View £0.446 £0.435 £0.427 £0.419	Min.: 1 Mult.: 1
Screws & Fasteners 10-24X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R10-24X5/8 2701 APM HEXSEAL 1: £0.969 40In Stock	Mfr. Part No. R10-24X5/8 2701 Mouser Part No 608-R10-24X5/8	APM HEXSEAL	Screws & Fasteners 10-24X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware		40In Stock	£0.969 £0.78 £0.663 £0.614 £0.422	Min.: 1 Mult.: 1
Screws & Fasteners 10-24X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R10-24X9/16 2701 APM HEXSEAL 1: £0.882 12In Stock	Mfr. Part No. R10-24X9/16 2701 Mouser Part No 608-R10-24X9/16	APM HEXSEAL	Screws & Fasteners 10-24X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	12In Stock	£0.882 £0.716 £0.608 £0.56 View £0.52 £0.493 £0.47 £0.453 £0.437	Min.: 1 Mult.: 1
Screws & Fasteners 10-24X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R10-24X7/8 2701 APM HEXSEAL 1: £1.12 27In Stock	Mfr. Part No. R10-24X7/8 2701 Mouser Part No 608-R10-24X7/8	APM HEXSEAL	Screws & Fasteners 10-24X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware	Datasheet	27In Stock	£1.12 £0.899 £0.759 £0.705 £0.495	Min.: 1 Mult.: 1
Screws & Fasteners 2-562X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw R2-56X1 2701 APM HEXSEAL 1: £0.89 16In Stock	Mfr. Part No. R2-56X1 2701 Mouser Part No 608-R2-56X1	APM HEXSEAL	Screws & Fasteners 2-562X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw Learn More about APM HEXSEAL self sealing hardware		16In Stock	£0.89 £0.70 £0.537 £0.53 View £0.515 £0.501 £0.492 £0.483	Min.: 1 Mult.: 1
Screws & Fasteners SEELSKREW FLATHEAD W/SILICON RBR O-RING SFR8-32X3/4-2701 APM HEXSEAL 1: £0.841 54In Stock	Mfr. Part No. SFR8-32X3/4-2701 Mouser Part No 608-SFR8-32X3/4-2701	APM HEXSEAL	Screws & Fasteners SEELSKREW FLATHEAD W/SILICON RBR O-RING		54In Stock	£0.841 £0.66 £0.603 £0.51 View £0.501 £0.488 £0.475 £0.466 £0.457	Min.: 1 Mult.: 1

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