The Valve,antiback Draft,protective, cataloged under National Stock Number 4240-00-021-2325, 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 Us Army Aviation and Missile Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-00-021-2325 |
| Primary Part Number | 10104749 |
| Item Name | Valve,antiback Draft,protective |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| General Characteristics Item Description | COMPONENTS,ANGLE,ALUMINUM ALLOY 1,BAR,ALUMINUM ALLOY 2,FRAME,AIR VALVE 1,HINGE,CONTINUOUS 2,HINGE,DOOR,AIR VALVE 1,INSERT 2,PANEL,LOUVERED 1,RECEPTACLE,TURNLOCK FASTENER 2,RIVET,SOLID 4,RIVET,UNIVERSAL HEAD 5,SHIM 1,STRIP,RUBBER,CELLULAR 1,STUD,TURNLOCK FASTENER 2,WASHER,SPRING TENSION 2; NOT DESIGNED FOR INSTALLATION IN RD PIPE; DESIGNED FOR INSTALLATION IN OTHER THAN RD PIPE,13 IN. W INPUT OPENING,13.750 IN. H INPUT OPENING IN |
| 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 |
|---|---|
| 10104749 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 4240-00-021-2325 is a Valve,antiback Draft,protective, manufactured by Us Army Aviation and Missile Command, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-00-021-2325 has 1 manufacturer part number on file: 10104749 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 1560-01-140-3660. Verify interchangeability with system specifications before substitution.
Key specifications for 10104749: General Characteristics Item Description: COMPONENTS,ANGLE,ALUMINUM ALLOY 1,BAR,ALUMINUM ALLOY 2,FRAME,AIR VALVE 1,HINGE,CONTINUOUS 2,HINGE,DOOR,AIR VALVE 1,INSERT 2,PANEL,LOUVERED 1,RECEPTACLE,TURNLOCK FASTENER 2,RIVET,SOLID 4,RIVET,UNIVERSAL HEAD 5,SHIM 1,STRIP,RUBBER,CELLULAR 1,STUD,TURNLOCK FASTENER 2,WASHER,SPRING TENSION 2; NOT DESIGNED FOR INSTALLATION IN RD PIPE; DESIGNED FOR INSTALLATION IN OTHER THAN RD PIPE,13 IN. W INPUT OPENING,13.750 IN. H INPUT OPENING IN. 1 specification is 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.