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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

S/6-32X1/4 2701
APM HEXSEAL
1: CHF 0.595
276On Order

Mfr. Part No.
S/6-32X1/4 2701

Mouser Part No
608-S/6-32X1/4

Screws & Fasteners

276On Order

CHF 0.595

CHF 0.425

CHF 0.388

CHF 0.34

View

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: CHF 2.63
36Expected 8/28/2026

Mfr. Part No.
ST1/4-20X1 2701

Mouser Part No
608-ST1/4-20X1

Screws & Fasteners 1/4-20X1" 18-8 Stainless Steel Self-Seal Silicone O-Ring, Hex Cap Screw

Datasheet

36Expected 8/28/2026

CHF 2.63

CHF 2.10

CHF 1.64

CHF 1.63

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/4"-20X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R1/4-20X7/8 2701
APM HEXSEAL
1: CHF 1.75
1In Stock

Mfr. Part No.
R1/4-20X7/8 2701

Mouser Part No
608-R1/4-20X7/8

Screws & Fasteners 1/4"-20X7/8", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

1In Stock

CHF 1.75

CHF 1.39

CHF 1.18

CHF 1.10

CHF 0.758

Min.: 1
Mult.: 1

Screws & Fasteners 2.5 x 12mm SeelSkrew

RM2.5X12MM 2701
APM HEXSEAL
1: CHF 1.25
94Expected 9/2/2026

Mfr. Part No.
RM2.5X12MM 2701

Mouser Part No
608-RM2.5X12MM2701

Screws & Fasteners 2.5 x 12mm SeelSkrew

94Expected 9/2/2026

CHF 1.25

CHF 0.983

CHF 0.901

CHF 0.805

View

Min.: 1
Mult.: 1

Screws & Fasteners SeelSkrew Screw 1/2" Thread Size 4-40

R4-40X1/2 2615
APM HEXSEAL
1: CHF 0.955
51Expected 8/27/2026

Mfr. Part No.
R4-40X1/2 2615

Mouser Part No
608-R440X1/22615

Screws & Fasteners SeelSkrew Screw 1/2" Thread Size 4-40

51Expected 8/27/2026

CHF 0.955

CHF 0.774

CHF 0.657

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 1/2-13 THREAD

1/2-13 AJ 6
APM HEXSEAL
1: CHF 4.00
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
1/2-13 AJ 6

Mouser Part No
608-1/2-13AJ6

Screws & Fasteners SEELNUTS 1/2-13 THREAD

Non-Stocked Lead-Time 10 Weeks

CHF 4.00

CHF 3.19

CHF 2.64

CHF 2.56

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 1/4-20 THREAD

1/4-20 AJ 6
APM HEXSEAL
1: CHF 2.99
Non-Stocked Lead-Time 6 Weeks

Mfr. Part No.
1/4-20 AJ 6

Mouser Part No
608-1/4-20AJ6

Screws & Fasteners SEELNUTS 1/4-20 THREAD

Non-Stocked Lead-Time 6 Weeks

CHF 2.99

CHF 2.80

CHF 2.44

CHF 2.32

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 1/4-28 THREAD

1/4-28 AJ 6
APM HEXSEAL
1: CHF 4.03
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
1/4-28 AJ 6

Mouser Part No
608-1/4-28AJ6

Screws & Fasteners SEELNUTS 1/4-28 THREAD

Non-Stocked Lead-Time 12 Weeks

CHF 4.03

CHF 3.24

CHF 2.44

CHF 2.43

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 3/8-16 THREAD

3/8-16 AJ 6
APM HEXSEAL
1: CHF 3.23
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
3/8-16 AJ 6

Mouser Part No
608-3/8-16AJ6

Screws & Fasteners SEELNUTS 3/8-16 THREAD

Non-Stocked Lead-Time 12 Weeks

CHF 3.23

CHF 3.03

CHF 2.66

CHF 2.52

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 5/8-18 THREAD

5/8-18 AJ 6
APM HEXSEAL
25: CHF 3.17
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
5/8-18 AJ 6

Mouser Part No
608-5/8-18AJ6

Screws & Fasteners SEELNUTS 5/8-18 THREAD

Non-Stocked Lead-Time 8 Weeks

CHF 3.17

CHF 3.16

CHF 3.07

CHF 3.00

View

Min.: 25
Mult.: 25

Screws & Fasteners 6-32X5/16", Phillips Pan Head, 18-8 Stainless Steel with Fluoro-Silicone O-Ring, Seal Screw

R6-32X5/16 2615
APM HEXSEAL
1: CHF 0.829
Non-Stocked Lead-Time 4 Weeks

Mfr. Part No.
R6-32X5/16 2615

Mouser Part No
608-R6-32X5/162615

Screws & Fasteners 6-32X5/16", Phillips Pan Head, 18-8 Stainless Steel with Fluoro-Silicone O-Ring, Seal Screw

Non-Stocked Lead-Time 4 Weeks

CHF 0.829

CHF 0.647

CHF 0.601

CHF 0.509

View

Min.: 1
Mult.: 1

Screws & Fasteners 6-32X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R6-32X7/16 2701
APM HEXSEAL
1: CHF 0.789
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
R6-32X7/16 2701

Mouser Part No
608-R6-32X7/16

Screws & Fasteners 6-32X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

Non-Stocked Lead-Time 12 Weeks

CHF 0.789

CHF 0.608

CHF 0.458

CHF 0.452

View

Min.: 1
Mult.: 1

Screws & Fasteners

ST1/4-20X1-1/2 2701
APM HEXSEAL
25: CHF 1.18
Non-Stocked Lead-Time 4 Weeks

Mfr. Part No.
ST1/4-20X1-1/2 2701

Mouser Part No
608-ST1/4-20X1-1/2

Screws & Fasteners

Non-Stocked Lead-Time 4 Weeks

CHF 1.18

CHF 1.10

CHF 1.02

CHF 0.973

View

Min.: 25
Mult.: 25

Screws & Fasteners 3/8-16X3/4" 18-8 Stainless Steel Self-Seal Silicone O-Ring, Hex Cap Screw

ST3/8-16X3/4 2701
APM HEXSEAL
1: CHF 3.41
Non-Stocked Lead-Time 3 Weeks

Mfr. Part No.
ST3/8-16X3/4 2701

Mouser Part No
608-ST3/8-16X3/4

Screws & Fasteners 3/8-16X3/4" 18-8 Stainless Steel Self-Seal Silicone O-Ring, Hex Cap Screw

Datasheet

Non-Stocked Lead-Time 3 Weeks

CHF 3.41

CHF 2.81

CHF 2.38

CHF 2.23

CHF 1.69

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 1/2-20 THREAD

1/2-20 AJ 6
APM HEXSEAL
1: CHF 4.00
Non-Stocked

Mfr. Part No.
1/2-20 AJ 6

Mouser Part No
608-1/2-20AJ6

Screws & Fasteners SEELNUTS 1/2-20 THREAD

Non-Stocked

CHF 4.00

CHF 3.19

CHF 2.64

CHF 2.56

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 10-24 THREAD

10-24 AJ 6
APM HEXSEAL
25: CHF 2.21
Non-Stocked

Mfr. Part No.
10-24 AJ 6

Mouser Part No
608-10-24AJ6

Screws & Fasteners SEELNUTS 10-24 THREAD

Non-Stocked

CHF 2.21

CHF 2.14

CHF 2.10

CHF 2.04

View

Min.: 25
Mult.: 25

Screws & Fasteners SEELNUTS 3/8-24 THREAD

3/8-24 AJ 6
APM HEXSEAL
25: CHF 2.59
Non-Stocked

Mfr. Part No.
3/8-24 AJ 6

Mouser Part No
608-3/8-24AJ6

Screws & Fasteners SEELNUTS 3/8-24 THREAD

Non-Stocked

CHF 2.59

CHF 2.58

CHF 2.50

CHF 2.45

View

Min.: 25
Mult.: 25

Screws & Fasteners SEELNUTS 5/16-18 THREAD

5/16-18 AJ 6
APM HEXSEAL
1: CHF 3.65
Non-Stocked

Mfr. Part No.
5/16-18 AJ 6

Mouser Part No
608-5/16-18AJ6

Screws & Fasteners SEELNUTS 5/16-18 THREAD

Non-Stocked

CHF 3.65

CHF 2.93

CHF 2.44

CHF 2.43

View

Min.: 1
Mult.: 1

Screws & Fasteners SEELNUTS 7/16-20 THREAD

7/16-20 AJ 6
APM HEXSEAL
25: CHF 2.64
Non-Stocked

Mfr. Part No.
7/16-20 AJ 6

Mouser Part No
608-7/16-20AJ6

Screws & Fasteners SEELNUTS 7/16-20 THREAD

Non-Stocked

CHF 2.64

CHF 2.56

CHF 2.50

CHF 2.46

View

Min.: 25
Mult.: 25

Screws & Fasteners SEELNUTS 8-32 THREAD

8-32 AJ 6
APM HEXSEAL
1: CHF 2.71
Non-Stocked

Mfr. Part No.
8-32 AJ 6

Mouser Part No
608-8-32AJ6

Screws & Fasteners SEELNUTS 8-32 THREAD

Non-Stocked

CHF 2.71

CHF 2.54

CHF 2.22

CHF 2.10

View

Min.: 1
Mult.: 1

Screws & Fasteners

R1/4-20X1-1/4 2701
APM HEXSEAL
50: CHF 1.42
Non-Stocked

Mfr. Part No.
R1/4-20X1-1/4 2701

Mouser Part No
608-R1/4-20X1-1/4

Screws & Fasteners

Non-Stocked

CHF 1.42

CHF 1.34

CHF 1.24

CHF 1.18

View

Min.: 50
Mult.: 50

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

R1/4-20X1-1/8 2701
APM HEXSEAL
50: CHF 2.64
Non-Stocked

Mfr. Part No.
R1/4-20X1-1/8 2701

Mouser Part No
608-R1/4-20X1-1/8

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

Non-Stocked

CHF 2.64

CHF 2.48

CHF 2.33

CHF 2.25

View

Min.: 50
Mult.: 50

Screws & Fasteners 1/4"-20X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R1/4-20X7/16 2701
APM HEXSEAL
1: CHF 1.12
Non-Stocked

Mfr. Part No.
R1/4-20X7/16 2701

Mouser Part No
608-R1/4-20X7/16

Screws & Fasteners 1/4"-20X7/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Non-Stocked

CHF 1.12

CHF 0.955

CHF 0.894

CHF 0.845

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/4"-20X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R1/4-20X9/16 2701
APM HEXSEAL
1: CHF 4.71
Non-Stocked

Mfr. Part No.
R1/4-20X9/16 2701

Mouser Part No
608-R1/4-20X9/16

Screws & Fasteners 1/4"-20X9/16", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Non-Stocked

CHF 4.71

CHF 3.79

CHF 3.69

CHF 3.14

View

Min.: 1
Mult.: 1

Screws & Fasteners 10-24X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

R10-24X1 2701
APM HEXSEAL
50: CHF 0.87
Non-Stocked

Mfr. Part No.
R10-24X1 2701

Mouser Part No
608-R10-24X1

Screws & Fasteners 10-24X1", Phillips Pan Head, 18-8 Stainless Steel with Silicone O-Ring, Seal Screw

Datasheet

Non-Stocked

CHF 0.87

CHF 0.805

CHF 0.556

Min.: 50
Mult.: 1