The Respirator,air Filtering, cataloged under National Stock Number 4240-00-099-6939, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Zf Industrieantriebe Witten Gmbh. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4240-00-099-6939 |
| Primary Part Number | RK7 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — No Item Name Available |
| Manufacturer | Zf Industrieantriebe Witten Gmbh |
| Status | CANCELLED |
| Furnished Filter Type and Quantity | 2 FILTER PAD |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Supplementary Features | GENERIC NSN |
| Mask Type | HALF FACEPIECE |
| Filter Type | FILTER PAD |
| Adjustability | ADJUSTABLE |
| Mask Filter Quantity | 2 |
| Accessory Components and Quantity | DUAL FILTER RECEPTACLE TYPE FURNISHED WITH 100 FILTERS |
| Filter Replaceability | REPLACEABLE |
| Nondefinitive Spec/std Data | I TYPE |
| Material Type | ELASTIC |
| Departure From Cited Designator | AS MODIFIED BY ACCESSORY COMPONENTS AND QUANTITY AND SPECIAL FEATURES |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| RK7 | Zf Industrieantriebe Witten Gmbh (DEU) |
| R-57 | American Optical Co (USA) |
| R5000 | Zf Industrieantriebe Witten Gmbh (DEU) |
| GGG-M-125/5 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 4240-00-099-6939 is a Respirator,air Filtering, manufactured by Zf Industrieantriebe Witten Gmbh, classified under FSC 4240 (No Item Name Available). Status: cancelled.
NSN 4240-00-099-6939 has 4 cross-referenced part numbers: RK7 (Zf Industrieantriebe Witten Gmbh), R-57 (American Optical Co), R5000 (Zf Industrieantriebe Witten Gmbh), GGG-M-125/5 (Federal Specifications Promulgated by General Services Administration Washington DC).
There are 10 known substitutes for 4240-00-099-6939: 4320-00-318-4258, 2920-00-710-6805, 4240-01-020-8772 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for RK7: Furnished Filter Type and Quantity: 2 FILTER PAD; Exhaust Valve: INCLUDED; Head Harness: INCLUDED; Supplementary Features: GENERIC NSN. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 4240-00-099-6939 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.