NBC-77 SOF® 40mm NATO Gas Mask Filter (CBRN)
NBC-77 SOF® 40mm NATO Gas Mask Filter
CBRN / TIC / Reactor-Rated Filter with 20-Year Shelf Life
The NBC-77 SOF® is a professional-grade 40mm NATO (Rd 40 × 1/7”) CBRN filter engineered to provide comprehensive respiratory protection against all known chemical warfare agents, toxic industrial chemicals, biological threats, radioactive particulates, and radioactive iodine compounds. Designed for long-term readiness and operational durability, it combines CBRN, TIC, and reactor-rated filtration into a single cartridge.
With a 20-year factory-sealed shelf life, the NBC-77 SOF® significantly reduces lifecycle replacement costs compared to standard 5–7 year filters, making it an ideal choice for preparedness, professional response, and long-term storage. Its rugged hard-shell housing protects the filtration media from impact and environmental damage while maintaining compatibility with all standard 40mm NATO-threaded respirators and PAPRs.
This filter is certified under EN 14387:2004 + A1:2008 and carries the A2B2E2K2HgSXP3 D R REACTOR classification, placing it among the most broadly protective consumer-accessible filters available.
Key Capabilities & Design Features
-
20-Year Shelf Life (Factory Sealed)
Designed for long-term storage with minimal degradation, reducing replacement cycles and cost of ownership. -
NATO-Standard 40mm Thread (Rd 40 × 1/7”)
Compatible with the majority of modern military, law-enforcement, and civilian full-face respirators and PAPRs. -
Comprehensive CBRN + TIC + Reactor Protection
Filters chemical warfare agents, industrial gases, riot control agents, particulates, and radioactive iodine (including methyl iodide). -
Rugged Impact-Resistant Housing
Hard-plastic shell protects filtration media during transport, storage, and operational use. -
Used by Military and CBRN Professionals Worldwide
Proven design trusted by special operations, civil defense, and preparedness professionals. -
Multiple Color Options
Available in Black, Ranger Green, and Sandstone (color does not affect performance).
Filter Classification (EN 14387)
A2B2E2K2HgSXP3 D R REACTOR
This classification indicates protection against:
-
Organic gases and vapors (A2)
-
Inorganic gases and vapors (B2)
-
Acid gases and vapors (E2)
-
Ammonia and amines (K2)
-
Mercury vapors (Hg)
-
Chemical warfare agents (SX)
-
High-efficiency particulates (P3)
-
Radioactive iodine / reactor-grade filtration (REACTOR)
-
Dust clogging tested (D)
-
Reusable (R)
Complete Technical Data — NBC-77 SOF® Filter
Physical Characteristics & Breathing Resistance
| Parameter | Specification |
|---|---|
| Diameter | 110 mm |
| Height | 85 mm |
| Weight | 335 g ±5% |
| Storage Time | 20 years (factory sealed) |
Breathing Resistance (EN 14387 + A1)
| Flow Rate | Requirement | NBC-77 SOF |
|---|---|---|
| 30 L/min | < 140 Pa | 260 Pa |
| 95 L/min | < 600 Pa | 980 Pa |
Particle Filtration Efficiency
| Test Medium | EN Requirement | NBC-77 SOF Performance |
|---|---|---|
| Sodium Chloride (NaCl) | 99.95% | >99.999% |
| Paraffin Oil | 99.95% | >99.999% |
Breakthrough Time & Dynamic Adsorption Capacity
(Tested per EN 14387 at 70% RH, 30 L/min)
| Filter Class | Test Gas | Concentration (ppm) | EN Min (min) | NBC-77 SOF (min) | DAC (g) |
|---|---|---|---|---|---|
| A2 | Cyclohexane | 5000 | 35 | 39 | 20.475 |
| B2 | Chlorine | 5000 | 20 | 45 | 20.250 |
| B2 | Hydrogen Sulphide | 5000 | 40 | >80 | >17.400 |
| B2 | Hydrogen Cyanide | 5000 | 25 | 50 | 8.400 |
| E2 | Sulphur Dioxide | 5000 | 20 | 25 | 9.975 |
| K2 | Ammonia | 5000 | 40 | 50 | 5.250 |
| Hg | Mercury Vapor | 13 mg/m³ | 100 hrs | >170 hrs | >3.900 |
| SX | Cyanogen Chloride | 2500 | 20 | 25 | 4.710 |
| SX | Chloropicrin | 5000 | 20 | 44 | 44.286 |
| SX | Phosgene | 5000 | 20 | >77 | >47.058 |
| REACTOR | Methyliodide¹³¹ | — | 2 hrs | >2 hrs | — |
Full Application Range
When used with a compatible respirator or PAPR, the NBC-77 SOF® provides protection against:
-
Chemical warfare agents (nerve, blister, choking, blood agents)
-
Riot control agents (CS, CN, CR, OC)
-
Radioactive particles and radioactive iodine compounds
-
Toxic industrial chemicals (TICs) including acids, solvents, ammonia, chlorine, mercury vapors
-
Biological aerosols (bacteria, viruses, toxins, fungi)
-
Smoke, dust, and combustion byproducts
-
Agricultural chemicals and pesticides
-
Industrial solvents such as benzene, toluene, vinyl chloride
-
Arsenic-based compounds (Clark I & II, Adamsite)
-
Mustard agents (H, HD, HN variants, Lewisite, CX)
-
G-series and V-series nerve agents
Storage & Handling Requirements
-
Store unopened filters between -5 °C to +30 °C, RH <80%
-
Sealed filters tolerate -30 °C to +50 °C, RH <95%
-
Do not clean, regenerate, or expose filters to water or compressed air
-
Dispose of used filters according to local hazardous-waste regulations
Important Notes
-
⚠️ Filters are sold individually
-
⚠️ Gas mask not included
-
⚠️ Color may vary due to availability (Black, Ranger Green, Sandstone)
-
⚠️ Use only in environments with ≥19.5% oxygen
Product Information
Product Information
Shipping & Returns
Shipping & Returns
NBC-77 SOF® 40mm NATO Gas Mask Filter (CBRN)
NBC-77 SOF® 40mm NATO Gas Mask Filter (CBRN)
NBC-77 SOF® 40mm NATO Gas Mask Filter
CBRN / TIC / Reactor-Rated Filter with 20-Year Shelf Life
The NBC-77 SOF® is a professional-grade 40mm NATO (Rd 40 × 1/7”) CBRN filter engineered to provide comprehensive respiratory protection against all known chemical warfare agents, toxic industrial chemicals, biological threats, radioactive particulates, and radioactive iodine compounds. Designed for long-term readiness and operational durability, it combines CBRN, TIC, and reactor-rated filtration into a single cartridge.
With a 20-year factory-sealed shelf life, the NBC-77 SOF® significantly reduces lifecycle replacement costs compared to standard 5–7 year filters, making it an ideal choice for preparedness, professional response, and long-term storage. Its rugged hard-shell housing protects the filtration media from impact and environmental damage while maintaining compatibility with all standard 40mm NATO-threaded respirators and PAPRs.
This filter is certified under EN 14387:2004 + A1:2008 and carries the A2B2E2K2HgSXP3 D R REACTOR classification, placing it among the most broadly protective consumer-accessible filters available.
Key Capabilities & Design Features
-
20-Year Shelf Life (Factory Sealed)
Designed for long-term storage with minimal degradation, reducing replacement cycles and cost of ownership. -
NATO-Standard 40mm Thread (Rd 40 × 1/7”)
Compatible with the majority of modern military, law-enforcement, and civilian full-face respirators and PAPRs. -
Comprehensive CBRN + TIC + Reactor Protection
Filters chemical warfare agents, industrial gases, riot control agents, particulates, and radioactive iodine (including methyl iodide). -
Rugged Impact-Resistant Housing
Hard-plastic shell protects filtration media during transport, storage, and operational use. -
Used by Military and CBRN Professionals Worldwide
Proven design trusted by special operations, civil defense, and preparedness professionals. -
Multiple Color Options
Available in Black, Ranger Green, and Sandstone (color does not affect performance).
Filter Classification (EN 14387)
A2B2E2K2HgSXP3 D R REACTOR
This classification indicates protection against:
-
Organic gases and vapors (A2)
-
Inorganic gases and vapors (B2)
-
Acid gases and vapors (E2)
-
Ammonia and amines (K2)
-
Mercury vapors (Hg)
-
Chemical warfare agents (SX)
-
High-efficiency particulates (P3)
-
Radioactive iodine / reactor-grade filtration (REACTOR)
-
Dust clogging tested (D)
-
Reusable (R)
Complete Technical Data — NBC-77 SOF® Filter
Physical Characteristics & Breathing Resistance
| Parameter | Specification |
|---|---|
| Diameter | 110 mm |
| Height | 85 mm |
| Weight | 335 g ±5% |
| Storage Time | 20 years (factory sealed) |
Breathing Resistance (EN 14387 + A1)
| Flow Rate | Requirement | NBC-77 SOF |
|---|---|---|
| 30 L/min | < 140 Pa | 260 Pa |
| 95 L/min | < 600 Pa | 980 Pa |
Particle Filtration Efficiency
| Test Medium | EN Requirement | NBC-77 SOF Performance |
|---|---|---|
| Sodium Chloride (NaCl) | 99.95% | >99.999% |
| Paraffin Oil | 99.95% | >99.999% |
Breakthrough Time & Dynamic Adsorption Capacity
(Tested per EN 14387 at 70% RH, 30 L/min)
| Filter Class | Test Gas | Concentration (ppm) | EN Min (min) | NBC-77 SOF (min) | DAC (g) |
|---|---|---|---|---|---|
| A2 | Cyclohexane | 5000 | 35 | 39 | 20.475 |
| B2 | Chlorine | 5000 | 20 | 45 | 20.250 |
| B2 | Hydrogen Sulphide | 5000 | 40 | >80 | >17.400 |
| B2 | Hydrogen Cyanide | 5000 | 25 | 50 | 8.400 |
| E2 | Sulphur Dioxide | 5000 | 20 | 25 | 9.975 |
| K2 | Ammonia | 5000 | 40 | 50 | 5.250 |
| Hg | Mercury Vapor | 13 mg/m³ | 100 hrs | >170 hrs | >3.900 |
| SX | Cyanogen Chloride | 2500 | 20 | 25 | 4.710 |
| SX | Chloropicrin | 5000 | 20 | 44 | 44.286 |
| SX | Phosgene | 5000 | 20 | >77 | >47.058 |
| REACTOR | Methyliodide¹³¹ | — | 2 hrs | >2 hrs | — |
Full Application Range
When used with a compatible respirator or PAPR, the NBC-77 SOF® provides protection against:
-
Chemical warfare agents (nerve, blister, choking, blood agents)
-
Riot control agents (CS, CN, CR, OC)
-
Radioactive particles and radioactive iodine compounds
-
Toxic industrial chemicals (TICs) including acids, solvents, ammonia, chlorine, mercury vapors
-
Biological aerosols (bacteria, viruses, toxins, fungi)
-
Smoke, dust, and combustion byproducts
-
Agricultural chemicals and pesticides
-
Industrial solvents such as benzene, toluene, vinyl chloride
-
Arsenic-based compounds (Clark I & II, Adamsite)
-
Mustard agents (H, HD, HN variants, Lewisite, CX)
-
G-series and V-series nerve agents
Storage & Handling Requirements
-
Store unopened filters between -5 °C to +30 °C, RH <80%
-
Sealed filters tolerate -30 °C to +50 °C, RH <95%
-
Do not clean, regenerate, or expose filters to water or compressed air
-
Dispose of used filters according to local hazardous-waste regulations
Important Notes
-
⚠️ Filters are sold individually
-
⚠️ Gas mask not included
-
⚠️ Color may vary due to availability (Black, Ranger Green, Sandstone)
-
⚠️ Use only in environments with ≥19.5% oxygen
Original: $79.99
-70%$79.99
$24.00Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
NBC-77 SOF® 40mm NATO Gas Mask Filter
CBRN / TIC / Reactor-Rated Filter with 20-Year Shelf Life
The NBC-77 SOF® is a professional-grade 40mm NATO (Rd 40 × 1/7”) CBRN filter engineered to provide comprehensive respiratory protection against all known chemical warfare agents, toxic industrial chemicals, biological threats, radioactive particulates, and radioactive iodine compounds. Designed for long-term readiness and operational durability, it combines CBRN, TIC, and reactor-rated filtration into a single cartridge.
With a 20-year factory-sealed shelf life, the NBC-77 SOF® significantly reduces lifecycle replacement costs compared to standard 5–7 year filters, making it an ideal choice for preparedness, professional response, and long-term storage. Its rugged hard-shell housing protects the filtration media from impact and environmental damage while maintaining compatibility with all standard 40mm NATO-threaded respirators and PAPRs.
This filter is certified under EN 14387:2004 + A1:2008 and carries the A2B2E2K2HgSXP3 D R REACTOR classification, placing it among the most broadly protective consumer-accessible filters available.
Key Capabilities & Design Features
-
20-Year Shelf Life (Factory Sealed)
Designed for long-term storage with minimal degradation, reducing replacement cycles and cost of ownership. -
NATO-Standard 40mm Thread (Rd 40 × 1/7”)
Compatible with the majority of modern military, law-enforcement, and civilian full-face respirators and PAPRs. -
Comprehensive CBRN + TIC + Reactor Protection
Filters chemical warfare agents, industrial gases, riot control agents, particulates, and radioactive iodine (including methyl iodide). -
Rugged Impact-Resistant Housing
Hard-plastic shell protects filtration media during transport, storage, and operational use. -
Used by Military and CBRN Professionals Worldwide
Proven design trusted by special operations, civil defense, and preparedness professionals. -
Multiple Color Options
Available in Black, Ranger Green, and Sandstone (color does not affect performance).
Filter Classification (EN 14387)
A2B2E2K2HgSXP3 D R REACTOR
This classification indicates protection against:
-
Organic gases and vapors (A2)
-
Inorganic gases and vapors (B2)
-
Acid gases and vapors (E2)
-
Ammonia and amines (K2)
-
Mercury vapors (Hg)
-
Chemical warfare agents (SX)
-
High-efficiency particulates (P3)
-
Radioactive iodine / reactor-grade filtration (REACTOR)
-
Dust clogging tested (D)
-
Reusable (R)
Complete Technical Data — NBC-77 SOF® Filter
Physical Characteristics & Breathing Resistance
| Parameter | Specification |
|---|---|
| Diameter | 110 mm |
| Height | 85 mm |
| Weight | 335 g ±5% |
| Storage Time | 20 years (factory sealed) |
Breathing Resistance (EN 14387 + A1)
| Flow Rate | Requirement | NBC-77 SOF |
|---|---|---|
| 30 L/min | < 140 Pa | 260 Pa |
| 95 L/min | < 600 Pa | 980 Pa |
Particle Filtration Efficiency
| Test Medium | EN Requirement | NBC-77 SOF Performance |
|---|---|---|
| Sodium Chloride (NaCl) | 99.95% | >99.999% |
| Paraffin Oil | 99.95% | >99.999% |
Breakthrough Time & Dynamic Adsorption Capacity
(Tested per EN 14387 at 70% RH, 30 L/min)
| Filter Class | Test Gas | Concentration (ppm) | EN Min (min) | NBC-77 SOF (min) | DAC (g) |
|---|---|---|---|---|---|
| A2 | Cyclohexane | 5000 | 35 | 39 | 20.475 |
| B2 | Chlorine | 5000 | 20 | 45 | 20.250 |
| B2 | Hydrogen Sulphide | 5000 | 40 | >80 | >17.400 |
| B2 | Hydrogen Cyanide | 5000 | 25 | 50 | 8.400 |
| E2 | Sulphur Dioxide | 5000 | 20 | 25 | 9.975 |
| K2 | Ammonia | 5000 | 40 | 50 | 5.250 |
| Hg | Mercury Vapor | 13 mg/m³ | 100 hrs | >170 hrs | >3.900 |
| SX | Cyanogen Chloride | 2500 | 20 | 25 | 4.710 |
| SX | Chloropicrin | 5000 | 20 | 44 | 44.286 |
| SX | Phosgene | 5000 | 20 | >77 | >47.058 |
| REACTOR | Methyliodide¹³¹ | — | 2 hrs | >2 hrs | — |
Full Application Range
When used with a compatible respirator or PAPR, the NBC-77 SOF® provides protection against:
-
Chemical warfare agents (nerve, blister, choking, blood agents)
-
Riot control agents (CS, CN, CR, OC)
-
Radioactive particles and radioactive iodine compounds
-
Toxic industrial chemicals (TICs) including acids, solvents, ammonia, chlorine, mercury vapors
-
Biological aerosols (bacteria, viruses, toxins, fungi)
-
Smoke, dust, and combustion byproducts
-
Agricultural chemicals and pesticides
-
Industrial solvents such as benzene, toluene, vinyl chloride
-
Arsenic-based compounds (Clark I & II, Adamsite)
-
Mustard agents (H, HD, HN variants, Lewisite, CX)
-
G-series and V-series nerve agents
Storage & Handling Requirements
-
Store unopened filters between -5 °C to +30 °C, RH <80%
-
Sealed filters tolerate -30 °C to +50 °C, RH <95%
-
Do not clean, regenerate, or expose filters to water or compressed air
-
Dispose of used filters according to local hazardous-waste regulations
Important Notes
-
⚠️ Filters are sold individually
-
⚠️ Gas mask not included
-
⚠️ Color may vary due to availability (Black, Ranger Green, Sandstone)
-
⚠️ Use only in environments with ≥19.5% oxygen