Duct Shut-Off Assembly4240-01-285-0616

NSN 4240-01-285-0616 · NIIN 012850616

FSC 4240 — Safety and Rescue Equipment · FSG 42 — Fire Fighting, Rescue, and Safety Equipment

Government record, cited

Also searched as 4240-01-285-0616 · 4240012850616 · NIIN 012850616 · 01-285-0616 · FSC 4240 Safety and Rescue Equipment

Nearby stock numbers ← 4240-01-285-0615 · 4240-01-285-4441 Straps, Climbers' →

Features

Duct Shut-Off Assembly — FSC 4240
General Characteristics Item Description: MATL FLUOROPLASTIC,ASTM-D-3275; 1.740 INS.O/A DIA;1.156 INS. O/A HEIGHT;C/O POST,INLET VALVE,5-1-1337;DISC INLET VALVE,5-1-1366;DUCT SHUT-OFF,5-1-1328;ITEM IS UNIQUE TO THE M43 GAS MASK

Identification

NSN: 4240-01-285-0616
NIIN: 012850616
FSC: 4240 — Safety and Rescue Equipment
FSG: 42 — Fire Fighting, Rescue, and Safety Equipment

General Description

The Duct Shut-Off Assembly, cataloged under National Stock Number 4240-01-285-0616, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4240-01-285-0616
Item Name	Duct Shut-Off Assembly
FSC / FSG	4240 / 42 — Safety and Rescue Equipment
Status	ACTIVE
General Characteristics Item Description	MATL FLUOROPLASTIC,ASTM-D-3275; 1.740 INS.O/A DIA;1.156 INS. O/A HEIGHT;C/O POST,INLET VALVE,5-1-1337;DISC INLET VALVE,5-1-1366;DUCT SHUT-OFF,5-1-1328;ITEM IS UNIQUE TO THE M43 GAS MASK

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code	X

⇄ Related Items 1

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

6515-01-591-3583511.413 POSSIBLE MATCH

DRILL,TWIST,BONE

Possible match (shared part number)Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
5-1-1413	3/2 Design control — primary reference U.S. Government activity

Related Parts

6515-01-591-3583POSSIBLE MATCH

DRILL,TWIST,BONE

511.413

Frequently Asked Questions

What is NSN 4240-01-285-0616?

NSN 4240-01-285-0616 is a Duct Shut-Off Assembly, classified under FSC 4240, Safety and Rescue Equipment. Status: active.

What NSN replaces 4240-01-285-0616?

1 possible match (shared part number, not a government interchangeability claim): 6515-01-591-3583. Verify interchangeability with system specifications before substitution.

What are the specifications of 4240-01-285-0616?

Key specifications for 4240-01-285-0616: General Characteristics Item Description: MATL FLUOROPLASTIC,ASTM-D-3275; 1.740 INS.O/A DIA;1.156 INS. O/A HEIGHT;C/O POST,INLET VALVE,5-1-1337;DISC INLET VALVE,5-1-1366;DUCT SHUT-OFF,5-1-1328;ITEM IS UNIQUE TO THE M43 GAS MASK. 1 specification is documented in the U.S. Government catalog.

Is NSN 4240-01-285-0616 hazardous material?

Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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