The Mask,air Line, cataloged under National Stock Number 4240-01-421-3664, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is E. D. Bullard Company Dba Ed Bullard Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-421-3664 |
| Primary Part Number | SPEC35L |
| Item Name | Mask,air Line |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | E. D. Bullard Company Dba Ed Bullard Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SPEC35L PRIMARY | E. D. Bullard Company Dba Ed Bullard Co (USA) |
| Reference | Meaning |
|---|---|
| 35L | 5/9 Secondary reference E. D. Bullard Company Dba Ed Bullard Co |
| M4535L | 5/9 Secondary reference E. D. Bullard Company Dba Ed Bullard Co |
NSN 4240-01-421-3664 is a Mask,air Line, manufactured by E. D. Bullard Company Dba Ed Bullard Co, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-421-3664 has 1 manufacturer part number on file: SPEC35L (E. D. Bullard Company Dba Ed Bullard Co).
Key specifications for SPEC35L: Special Features: LARGE FULL FACE MASK; B135 BREATHING TUBE ASSEMBLY WITH CONSTANT AIR FLOW VALVE; CONTINUOUS FLOW/PRESSURE DEMAND; SOLE SOURCE REQUIRED BY STATUTE 6.302; NIOSH APPROVAL TC-19C-322 AND 321; End Item Identification: E.D. BULLARD COMPANY, SERIES M45. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.