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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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Types of Electromechanical

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Part #

Screws & Fasteners 8-32X1/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X1/4 2701
APM HEXSEAL
1: CHF 0.491
1’241In Stock

Mfr. Part No.
R8-32X1/4 2701

Mouser Part No
608-R8-32X1/4

Screws & Fasteners 8-32X1/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

1’241In Stock

CHF 0.491

CHF 0.417

CHF 0.389

CHF 0.367

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X3/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X3/4 2701
APM HEXSEAL
1: CHF 0.724
102In Stock

Mfr. Part No.
R8-32X3/4 2701

Mouser Part No
608-R8-32X3/4

Screws & Fasteners 8-32X3/4", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

102In Stock

CHF 0.724

CHF 0.618

CHF 0.579

CHF 0.546

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X5/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X5/16 2701
APM HEXSEAL
1: CHF 0.628
136In Stock

Mfr. Part No.
R8-32X5/16 2701

Mouser Part No
608-R8-32X5/162701

Screws & Fasteners 8-32X5/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

136In Stock

CHF 0.628

CHF 0.534

CHF 0.502

CHF 0.472

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X7/16 2701
APM HEXSEAL
1: CHF 0.652
111In Stock

Mfr. Part No.
R8-32X7/16 2701

Mouser Part No
608-R8-32X7/16

Screws & Fasteners 8-32X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

111In Stock

CHF 0.652

CHF 0.551

CHF 0.517

CHF 0.487

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X7/8 2701
APM HEXSEAL
1: CHF 0.756
758In Stock

Mfr. Part No.
R8-32X7/8 2701

Mouser Part No
608-R8-32X7/8

Screws & Fasteners 8-32X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

758In Stock

CHF 0.756

CHF 0.71

CHF 0.61

CHF 0.576

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELSKREW MT PH REC M4 X 0.7 THD 20MM LG

RM4X20MM-2701
APM HEXSEAL
1: CHF 0.523
1’141In Stock

Mfr. Part No.
RM4X20MM-2701

Mouser Part No
608-RM4X20MM2701

Screws & Fasteners SEELSKREW MT PH REC M4 X 0.7 THD 20MM LG

Datasheet

1’141In Stock

CHF 0.523

CHF 0.492

CHF 0.422

CHF 0.397

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELSKREW FH REC 4-40 THD 1/4" NBR

SFR4-40 X 1/4 2701
APM HEXSEAL
1: CHF 0.563
310In Stock
2’150Expected 9/1/2026

Mfr. Part No.
SFR4-40 X 1/4 2701

Mouser Part No
608-SFR4-40X1/42701

Screws & Fasteners SEELSKREW FH REC 4-40 THD 1/4" NBR

310In Stock

2’150Expected 9/1/2026

CHF 0.563

CHF 0.434

CHF 0.396

CHF 0.348

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 5/16-24 THREAD

5/16-24 AJ 6
APM HEXSEAL
1: CHF 2.99
15In Stock

Mfr. Part No.
5/16-24 AJ 6

Mouser Part No
608-5/16-24AJ6

Screws & Fasteners SEELNUTS 5/16-24 THREAD

15In Stock

CHF 2.99

CHF 2.80

CHF 2.44

CHF 2.32

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/4"-20X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R1/4-20X5/8 2701
APM HEXSEAL
1: CHF 1.25
65In Stock

Mfr. Part No.
R1/4-20X5/8 2701

Mouser Part No
608-R1/4-20X5/8

Screws & Fasteners 1/4"-20X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

65In Stock

CHF 1.25

CHF 1.08

CHF 1.01

CHF 0.955

View

Min.: 1
Mult.: 1

Screws & Fasteners 10-32X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R10-32X1 2701
APM HEXSEAL
1: CHF 0.837
3In Stock

Mfr. Part No.
R10-32X1 2701

Mouser Part No
608-R10-32X1

Screws & Fasteners 10-32X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

3In Stock

CHF 0.837

CHF 0.716

CHF 0.672

CHF 0.634

View

Min.: 1
Mult.: 1

Screws & Fasteners 10-32X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R10-32X3/4 2701
APM HEXSEAL
1: CHF 0.894
296In Stock

Mfr. Part No.
R10-32X3/4 2701

Mouser Part No
608-R10-32X3/4

Screws & Fasteners 10-32X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

296In Stock

CHF 0.894

CHF 0.764

CHF 0.718

CHF 0.677

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X5/8 2701
APM HEXSEAL
1: CHF 0.709
30In Stock

Mfr. Part No.
R8-32X5/8 2701

Mouser Part No
608-R8-32X5/8

Screws & Fasteners 8-32X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

30In Stock

CHF 0.709

CHF 0.601

CHF 0.564

CHF 0.532

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X5/8", Phillips Flat Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

SFR8-32X5/8 2701
APM HEXSEAL
1: CHF 0.612
29In Stock

Mfr. Part No.
SFR8-32X5/8 2701

Mouser Part No
608-SFR8-32X5/82701

Screws & Fasteners 8-32X5/8", Phillips Flat Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

29In Stock

CHF 0.612

CHF 0.533

CHF 0.52

CHF 0.515

View

Min.: 1
Mult.: 1

Screws & Fasteners 4-40X1/2", Slotted Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

S4-40X1/2 2701
APM HEXSEAL
1: CHF 0.563
82In Stock

Mfr. Part No.
S4-40X1/2 2701

Mouser Part No
608-S4-40X1/22701

Screws & Fasteners 4-40X1/2", Slotted Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

82In Stock

CHF 0.563

CHF 0.434

CHF 0.396

CHF 0.337

View

Min.: 1
Mult.: 1

Screws & Fasteners 10-24X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R10-24X7/16 2701
APM HEXSEAL
1: CHF 0.934
87In Stock

Mfr. Part No.
R10-24X7/16 2701

Mouser Part No
608-R10-24X7/16

Screws & Fasteners 10-24X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

87In Stock

CHF 0.934

CHF 0.753

CHF 0.639

CHF 0.59

CHF 0.40

Min.: 1
Mult.: 1

Screws & Fasteners SEELSKREW 6-32 X 5/8 WITH VITON O-RING

R6-32X5/8-5701
APM HEXSEAL
1: CHF 0.934
4In Stock
Factory Special Order

Mfr. Part No.
R6-32X5/8-5701

Mouser Part No
608-R6-32X5/8-5701

Factory Special Order

Screws & Fasteners SEELSKREW 6-32 X 5/8 WITH VITON O-RING

4In Stock

CHF 0.934

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/4"-20X1/2", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R1/4-20X1/2 2701
APM HEXSEAL
1: CHF 0.945
Non-Stocked Lead-Time 6 Weeks

Mfr. Part No.
R1/4-20X1/2 2701

Mouser Part No
608-R1/4-20X1/2

Screws & Fasteners 1/4"-20X1/2", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

Non-Stocked Lead-Time 6 Weeks

CHF 0.945

CHF 0.813

CHF 0.764

CHF 0.721

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELSKREW STD PH REC 4-40 THD 3/16"LG

R4-40X3/16 2701
APM HEXSEAL
1: CHF 0.709
10’970Expected 8/31/2026

Mfr. Part No.
R4-40X3/16 2701

Mouser Part No
608-R4-40X3/162701

Screws & Fasteners SEELSKREW STD PH REC 4-40 THD 3/16"LG

10’970Expected 8/31/2026

CHF 0.709

CHF 0.561

CHF 0.475

CHF 0.436

View

Min.: 1
Mult.: 1

Screws & Fasteners M2.5X6MM, Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

RM2.5x6MM 2701
APM HEXSEAL
1: CHF 0.805
2’401In Stock
3’550Expected 10/21/2026

Mfr. Part No.
RM2.5x6MM 2701

Mouser Part No
608-RM2.5X6MM2701

Screws & Fasteners M2.5X6MM, Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

2’401In Stock

3’550Expected 10/21/2026

CHF 0.805

CHF 0.625

CHF 0.488

CHF 0.469

View

Min.: 1
Mult.: 1

Screws & Fasteners

SFR6-32 x 3/8 2701
APM HEXSEAL
1: CHF 0.733
4’299On Order

Mfr. Part No.
SFR6-32 x 3/8 2701

Mouser Part No
608-SFR6-323/82701

Screws & Fasteners

4’299On Order

CHF 0.733

CHF 0.565

CHF 0.429

CHF 0.419

View

Min.: 1
Mult.: 1

Screws & Fasteners 10-32X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R10-32X5/8 2701
APM HEXSEAL
1: CHF 0.684
375Expected 9/21/2026

Mfr. Part No.
R10-32X5/8 2701

Mouser Part No
608-R10-32X5/8

Screws & Fasteners 10-32X5/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

375Expected 9/21/2026

CHF 0.684

CHF 0.584

CHF 0.548

CHF 0.517

View

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: CHF 0.955
160On Order

Mfr. Part No.
R2-56X5/16 2701

Mouser Part No
608-R2-56X5/16

Screws & Fasteners 2-562X5/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

160On Order

CHF 0.955

CHF 0.751

CHF 0.685

CHF 0.607

View

Min.: 1
Mult.: 1

Screws & Fasteners 4-40X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R4-40X7/8 2701
APM HEXSEAL
1: CHF 0.532
293Expected 8/31/2026

Mfr. Part No.
R4-40X7/8 2701

Mouser Part No
608-R4-40X7/8

Screws & Fasteners 4-40X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

293Expected 8/31/2026

CHF 0.532

CHF 0.451

CHF 0.422

CHF 0.397

View

Min.: 1
Mult.: 1

Screws & Fasteners

R8-32x3/16 2701
APM HEXSEAL
1: CHF 0.797
90Expected 9/11/2026

Mfr. Part No.
R8-32x3/16 2701

Mouser Part No
608-R8-32X3/162701

Screws & Fasteners

90Expected 9/11/2026

CHF 0.797

CHF 0.621

CHF 0.566

CHF 0.499

View

Min.: 1
Mult.: 1

Screws & Fasteners 8-32X3/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R8-32X3/8 2701
APM HEXSEAL
1: CHF 0.507
69Expected 10/21/2026

Mfr. Part No.
R8-32X3/8 2701

Mouser Part No
608-R8-32X3/8

Screws & Fasteners 8-32X3/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

69Expected 10/21/2026

CHF 0.507

CHF 0.475

CHF 0.405

CHF 0.382

View

Min.: 1
Mult.: 1