In addition to fastening, our self-sealing screws and bolts offer a reliable and reusable seal, preventing (or containing!) contamination from dust, air, water, lubricants and other liquid or gaseous substances.
They are also vibration resistant, making them a great choice for applications that encounter day-to-day jarring, or repetitive movement.
Should you need a more serious level of vibration resistance, our screws and bolts are available with additional locking features, such as self-locking pellets, strips and patches. Seelskrews® and Seelbolts® are available in many standard thread sizes and with various o-ring elastomer options. Some additional customizations include specialty thread-forming variations, tamper-resistant drives, thread captivation, as well as paint and finish options.
For information on maximum torque values for Seelskrews® and Seelbolts® please see our table of Torque Values for Self-Sealing Hardware.
- IMPERIAL PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
- METRIC PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
- IMPERIAL PAN HEAD with SLOTTED DRIVE
- METRIC PAN HEAD with SLOTTED DRIVE
- IMPERIAL FLAT HEAD with CROSS RECESS DRIVE (PHILLIPS)
- IMPERIAL HEXAGONAL HEAD BOLT
- METRIC HEXAGONAL HEAD BOLT
IMPERIAL PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
† Standard for stock screws and bolts. ‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|---|
| 2-56 UNC-2A | #1 | 1/4" | 0.181" | 0.062" | 0.091" - 0.950" |
| 4-40 UNC-2A | #1 | 1/4" | 0.238" | 0.080" | 0.125" - 0.129" |
| 6-32 UNC-2A | #2 | 1/4" | 0.294" | 0.097" | 0.147" - 0.152" |
| 8-32 UNC-2A | #2 | 1/4" | 0.347" | 0.115" | 0.173" - 0.179" |
| 10-32 UNF-2A | #2 | 3/8" | 0.403" | 0.133" | 0.199" - 0.204" |
| 10-24 UNC-2A | #2 | 3/8" | 0.403" | 0.133" | 0.199" - 0.204" |
| 1/4-20 UNC-2A | #3 | 3/8" | 0.517" | 0.175" | 0.265" - 0.269" |
| 1/4-28 UNF-2A | #3 | 3/8" | 0.517" | 0.175" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
METRIC PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|---|
| M2 X 0.40 6g | #1 | 4mm | 4.24mm | 1.60mm | 2.31mm - 2.41mm |
| M2.5 X 0.45 6g | #1 | 4mm | 5.46mm | 2.10mm | 2.67mm - 2.84mm |
| M3 X 0.50 6g | #2 | 4mm | 6.70mm | 2.40mm | 3.55mm - 3.65mm |
| M4 X 0.70 6g | #2 | 4mm | 8.69mm | 3.05mm | 4.39mm - 4.54mm |
| M5 X 0.80 6g | #2 | 6mm | 9.90mm | 3.70mm | 5.56mm - 5.66mm |
| M6 X 1 6g | #3 | 6mm | 12.58mm | 4.60mm | 6.73mm - 6.83mm |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL PAN HEAD with SLOTTED DRIVE
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|
| 2-56 UNC-2A | 1/4" | 0.168" | 0.055" | 0.091" - 0.950" |
| 4-40 UNC-2A | 1/4" | 0.220" | 0.069" | 0.125" - 0.129" |
| 6-32 UNC-2A | 1/4" | 0.271" | 0.083" | 0.147" - 0.149" |
| 8-32 UNC-2A | 1/4" | 0.323" | 0.097" | 0.173" - 0.177" |
| 10-32 UNF-2A | 1/4" | 0.374" | 0.113" | 0.199" - 0.201" |
| 10-24 UNC-2A | 1/4" | 0.374" | 0.113" | 0.199" - 0.201" |
| 1/4-20 UNC-2A | 5/16" | 0.493" | 0.148" | 0.265" - 0.269" |
| 1/4-28 UNF-2A | 5/16" | 0.493" | 0.148" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
METRIC PAN HEAD with SLOTTED DRIVE
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|
| M2 x 0.40 6g | 4mm | 4.24mm | 1.37mm | 2.31mm - 2.41mm |
| M2.5 x 0.45 6g | 4mm | 5.56mm | 1.73mm | 2.67mm - 2.84mm |
| M3 x 0.50 6g | 4mm | 6.22mm | 1.90mm | 3.55mm - 3.65mm |
| M4 x 0.70 6g | 4mm | 8.17mm | 2.43mm | 4.39mm - 4.54mm |
| M5 x 0.80 6g | 6mm | 9.70mm | 3.05mm | 5.56mm - 5.66mm |
| M6 x 1 6g | 6mm | 12.49mm | 3.73mm | 6.73mm - 6.83mm |
| M8 x 1.25 6g | 6mm | 15.62mm | 4.52mm | 8.45mm - 8.55mm |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL FLAT HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length Available (L) | Max. Head Diameter (C) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|
| 2-56 UNC-2A | #1 | 1/4" | 0.172" | 0.091" - 0.950" |
| 4-40 UNC-2A | #1 | 1/4" | 0.225" | 0.125" - 0.129" |
| 6-32 UNC-2A | #2 | 1/4" | 0.279" | 0.147" - 0.152" |
| 8-32 UNC-2A | #2 | 1/4" | 0.332" | 0.173" - 0.179" |
| 10-24 UNC-2A | #2 | 5/16" | 0.385" | 0.199" - 0.204" |
| 10-32 UNF-2A | #2 | 5/16" | 0.385" | 0.199" - 0.204" |
| 1/4-20 UNC-2A | #3 | 3/8" | 0.507" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL HEXAGONAL HEAD BOLT
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Bolt Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length Available (L) | Distance Between Flats (C) | Distance Between Points (P) † | Max. Head Height (D) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|---|
| 1/4-28 UNF-2A | 3/8" | 0.440" | 0.510" | 0.163" | 0.265" - 0.269" |
| 1/4-20 UNC-2A | 3/8" | 0.440" | 0.510" | 0.163" | 0.265" - 0.269" |
| 5/16-24 UNF-2A | 1/2" | 0.502" | 0.580" | 0.211" | 0.332" - 0.336" |
| 5/16-18 UNC-2A | 3/8" | 0.502" | 0.580" | 0.211" | 0.332" - 0.336" |
| 3/8-24 UNF-2A | 5/8" | 0.565" | 0.650" | 0.243" | 0.395" - 0.399" |
| 3/8-16 UNC-2A | 1/2" | 0.565" | 0.650" | 0.243" | 0.395" - 0.399" |
| 1/2-20 UNF-2A | 1/2" | 0.752" | 0.870" | 0.323" | 0.530" - 0.534" |
| 1/2-13 UNC-2A | 3/4" | 0.752" | 0.870" | 0.323" | 0.530" - 0.534" |
† The values provided for Distance Between Points are for reference only. |
|||||
For a full list of part numbers, please contact APM Hexseal.
METRIC HEXAGONAL HEAD BOLT
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Bolt Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length Available (L) | Distance Between Flats (C) | Distance Between Points (P) † | Max. Head Height (D) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|---|
| M6 X 1 6g | 8mm | 10mm | 11.28mm | 4.15mm | 6.73mm - 6.83mm |
| M8 X 1.25 6g | 12mm | 13mm | 14.69mm | 5.65mm | 8.45mm - 8.55mm |
| M10 X 1.5 6g | 12mm | 17mm | 19.25mm | 7.18mm | 10.53mm - 10.64mm |
| M12 X 1.75 6g | 20mm | 19mm | 21.50mm | 8.18mm | 12.79mm - 12.9mm |
† The values provided for Distance Between Points are for reference only. |
|||||
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
† Standard for stock screws and bolts. ‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|---|
| 2-56 UNC-2A | #1 | 1/4" | 0.181" | 0.062" | 0.091" - 0.950" |
| 4-40 UNC-2A | #1 | 1/4" | 0.238" | 0.080" | 0.125" - 0.129" |
| 6-32 UNC-2A | #2 | 1/4" | 0.294" | 0.097" | 0.147" - 0.152" |
| 8-32 UNC-2A | #2 | 1/4" | 0.347" | 0.115" | 0.173" - 0.179" |
| 10-32 UNF-2A | #2 | 3/8" | 0.403" | 0.133" | 0.199" - 0.204" |
| 10-24 UNC-2A | #2 | 3/8" | 0.403" | 0.133" | 0.199" - 0.204" |
| 1/4-20 UNC-2A | #3 | 3/8" | 0.517" | 0.175" | 0.265" - 0.269" |
| 1/4-28 UNF-2A | #3 | 3/8" | 0.517" | 0.175" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
METRIC PAN HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|---|
| M2 X 0.40 6g | #1 | 4mm | 4.24mm | 1.60mm | 2.31mm - 2.41mm |
| M2.5 X 0.45 6g | #1 | 4mm | 5.46mm | 2.10mm | 2.67mm - 2.84mm |
| M3 X 0.50 6g | #2 | 4mm | 6.70mm | 2.40mm | 3.55mm - 3.65mm |
| M4 X 0.70 6g | #2 | 4mm | 8.69mm | 3.05mm | 4.39mm - 4.54mm |
| M5 X 0.80 6g | #2 | 6mm | 9.90mm | 3.70mm | 5.56mm - 5.66mm |
| M6 X 1 6g | #3 | 6mm | 12.58mm | 4.60mm | 6.73mm - 6.83mm |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL PAN HEAD with SLOTTED DRIVE
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|
| 2-56 UNC-2A | 1/4" | 0.168" | 0.055" | 0.091" - 0.950" |
| 4-40 UNC-2A | 1/4" | 0.220" | 0.069" | 0.125" - 0.129" |
| 6-32 UNC-2A | 1/4" | 0.271" | 0.083" | 0.147" - 0.149" |
| 8-32 UNC-2A | 1/4" | 0.323" | 0.097" | 0.173" - 0.177" |
| 10-32 UNF-2A | 1/4" | 0.374" | 0.113" | 0.199" - 0.201" |
| 10-24 UNC-2A | 1/4" | 0.374" | 0.113" | 0.199" - 0.201" |
| 1/4-20 UNC-2A | 5/16" | 0.493" | 0.148" | 0.265" - 0.269" |
| 1/4-28 UNF-2A | 5/16" | 0.493" | 0.148" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
METRIC PAN HEAD with SLOTTED DRIVE
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length
Available (L) |
Max. Head
Diameter (C) |
Max. Head
Height (D) |
Recommended Clearance
Hole (Min. - Max.) |
|---|---|---|---|---|
| M2 x 0.40 6g | 4mm | 4.24mm | 1.37mm | 2.31mm - 2.41mm |
| M2.5 x 0.45 6g | 4mm | 5.56mm | 1.73mm | 2.67mm - 2.84mm |
| M3 x 0.50 6g | 4mm | 6.22mm | 1.90mm | 3.55mm - 3.65mm |
| M4 x 0.70 6g | 4mm | 8.17mm | 2.43mm | 4.39mm - 4.54mm |
| M5 x 0.80 6g | 6mm | 9.70mm | 3.05mm | 5.56mm - 5.66mm |
| M6 x 1 6g | 6mm | 12.49mm | 3.73mm | 6.73mm - 6.83mm |
| M8 x 1.25 6g | 6mm | 15.62mm | 4.52mm | 8.45mm - 8.55mm |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL FLAT HEAD with CROSS RECESS DRIVE (PHILLIPS)
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Screw Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Drive Size | Min. Length Available (L) | Max. Head Diameter (C) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|
| 2-56 UNC-2A | #1 | 1/4" | 0.172" | 0.091" - 0.950" |
| 4-40 UNC-2A | #1 | 1/4" | 0.225" | 0.125" - 0.129" |
| 6-32 UNC-2A | #2 | 1/4" | 0.279" | 0.147" - 0.152" |
| 8-32 UNC-2A | #2 | 1/4" | 0.332" | 0.173" - 0.179" |
| 10-24 UNC-2A | #2 | 5/16" | 0.385" | 0.199" - 0.204" |
| 10-32 UNF-2A | #2 | 5/16" | 0.385" | 0.199" - 0.204" |
| 1/4-20 UNC-2A | #3 | 3/8" | 0.507" | 0.265" - 0.269" |
For a full list of part numbers, please contact APM Hexseal.
IMPERIAL HEXAGONAL HEAD BOLT
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Bolt Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length Available (L) | Distance Between Flats (C) | Distance Between Points (P) † | Max. Head Height (D) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|---|
| 1/4-28 UNF-2A | 3/8" | 0.440" | 0.510" | 0.163" | 0.265" - 0.269" |
| 1/4-20 UNC-2A | 3/8" | 0.440" | 0.510" | 0.163" | 0.265" - 0.269" |
| 5/16-24 UNF-2A | 1/2" | 0.502" | 0.580" | 0.211" | 0.332" - 0.336" |
| 5/16-18 UNC-2A | 3/8" | 0.502" | 0.580" | 0.211" | 0.332" - 0.336" |
| 3/8-24 UNF-2A | 5/8" | 0.565" | 0.650" | 0.243" | 0.395" - 0.399" |
| 3/8-16 UNC-2A | 1/2" | 0.565" | 0.650" | 0.243" | 0.395" - 0.399" |
| 1/2-20 UNF-2A | 1/2" | 0.752" | 0.870" | 0.323" | 0.530" - 0.534" |
| 1/2-13 UNC-2A | 3/4" | 0.752" | 0.870" | 0.323" | 0.530" - 0.534" |
† The values provided for Distance Between Points are for reference only. |
|||||
For a full list of part numbers, please contact APM Hexseal.
METRIC HEXAGONAL HEAD BOLT
MATERIAL SPECIFICATIONS
For APM Hexseal® Standard Seelskrews® & Seelbolts®
- Bolt Material:
- 18/8 Stainless Steel, passivated
- Threads:
- Imperial— Class 2A †; Metric— Class 6g
- O-Ring Elastomer:
- Silicone conforms to A-A-59588, Class 2, GR60 or GR70, Red ‡
- Temperature Range:
- -80° F to +425° F ( -62° C to +219° C)
- Pressure Range:
- Up to 20,000 psig internal and external (subject to clearance hole dimensions).
- Resistant to:
- Splash, salt spray, sunlight, ozone, weather, fungus, dust, and most acids and lubricating oils.
‡ Alternative o-ring elastomers are available. Consult our O-Ring Elastomer Options table for details.
| Thread Size | Min. Length Available (L) | Distance Between Flats (C) | Distance Between Points (P) † | Max. Head Height (D) | Recommended Clearance Hole (Min. - Max.) |
|---|---|---|---|---|---|
| M6 X 1 6g | 8mm | 10mm | 11.28mm | 4.15mm | 6.73mm - 6.83mm |
| M8 X 1.25 6g | 12mm | 13mm | 14.69mm | 5.65mm | 8.45mm - 8.55mm |
| M10 X 1.5 6g | 12mm | 17mm | 19.25mm | 7.18mm | 10.53mm - 10.64mm |
| M12 X 1.75 6g | 20mm | 19mm | 21.50mm | 8.18mm | 12.79mm - 12.9mm |
† The values provided for Distance Between Points are for reference only. |
|||||
For a full list of part numbers, please contact APM Hexseal.
Quality:
Many of APM Hexseal’s products are “UL Recognized Components” Full Details >
APM Hexseal has carefully studied this legislation and maintains that, based on the following points, we are in compliance with, and not required to register in, the REACH program. Full Details >
APM Hexseal is committed to helping our customers select products that will meet the RoHS Directive, as well as help comply with the WEEE Directive. Full Details >
Related Resources:
Seal Stuff In, Seal Stuff Out
One of the best ways to make sure that your machinery stays up and running in the face of adversity is to make sure that it’s properly sealed.
Get Your eBook