General Characteristics Item Description: FIBER MATERIAL - ARAMID LINER POLYESTER OR POLYESTER AND COTTON OR POLYESTER AND RAYON LINING COTTON MAIN BODY; CLOTH NAME - BATTING LINER TWILL LINING SATEEN MAIN BODY; COLOR - US ARMY GREEN, 107 MAIN BODY; GARMENT SIZE - 32 X 31; CLOSING METHOD - SNAP FASTENER FRONT; ADJUSTMENT METHOD - STRAP WAIST; POCKET TYPE - RIGHT AND LEFT HIP PATCH; COATING SUBSTANCE - PLASTIC, POLYVINYL CHLORIDE OR RUBBER, POLYCHLOROPRENE INTERMEDIATE LAYER; ENVIRONMENTAL PROTECTION - FIRE RESISTANT AND WATER REPELLENT; FEAT PROVIDED - LINER
Identification
NSN: 4210-01-166-7798
NIIN: 011667798
FSC: 4210 — Firefighting Equipment
FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
General Description
The Firemen's Trousers, cataloged under National Stock Number 4210-01-166-7798, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government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
4210-01-166-7798
Item Name
Firemen's Trousers
FSC / FSG
4210 / 42 — Firefighting Equipment
Status
ACTIVE
General Characteristics Item Description
FIBER MATERIAL - ARAMID LINER POLYESTER OR POLYESTER AND COTTON OR POLYESTER AND RAYON LINING COTTON MAIN BODY; CLOTH NAME - BATTING LINER TWILL LINING SATEEN MAIN BODY; COLOR - US ARMY GREEN, 107 MAIN BODY; GARMENT SIZE - 32 X 31; CLOSING METHOD - SNAP FASTENER FRONT; ADJUSTMENT METHOD - STRAP WAIST; POCKET TYPE - RIGHT AND LEFT HIP PATCH; COATING SUBSTANCE - PLASTIC, POLYVINYL CHLORIDE OR RUBBER, POLYCHLOROPRENE INTERMEDIATE LAYER; ENVIRONMENTAL PROTECTION - FIRE RESISTANT AND WATER REPELLENT; FEAT PROVIDED - LINER
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 Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4210-01-166-7799POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7800POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7801POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7802POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7803POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7804POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7805POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7806POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7807POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
4210-01-166-7808POSSIBLE MATCH
FIREMEN'S TROUSERS
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MILT3901
5/9Secondary reference
U.S. Government activity
MIL-T-3901
4/1Identification reference
U.S. Government activity
Related Parts
4210-01-166-7799POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7800POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7801POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7802POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7803POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7804POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7805POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7806POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7807POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7808POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7809POSSIBLE MATCH
FIREMEN'S TROUSERS
4210-01-166-7810POSSIBLE MATCH
FIREMEN'S TROUSERS
Frequently Asked Questions
What is NSN 4210-01-166-7798?
NSN 4210-01-166-7798 is a Firemen's Trousers, classified under FSC 4210, Firefighting Equipment. Status: active.
What NSN replaces 4210-01-166-7798?
12 possible matches (shared part number, not a government interchangeability claim): 4210-01-166-7799, 4210-01-166-7800, 4210-01-166-7801. Verify interchangeability with system specifications before substitution.
What are the specifications of 4210-01-166-7798?
Key specifications for 4210-01-166-7798: General Characteristics Item Description: FIBER MATERIAL - ARAMID LINER POLYESTER OR POLYESTER AND COTTON OR POLYESTER AND RAYON LINING COTTON MAIN BODY; CLOTH NAME - BATTING LINER TWILL LINING SATEEN MAIN BODY; COLOR - US ARMY GREEN, 107 MAIN BODY; GARMENT SIZE - 32 X 31; CLOSING METHOD - SNAP FASTENER FRONT; ADJUSTMENT METHOD - STRAP WAIST; POCKET TYPE - RIGHT AND LEFT HIP PATCH; COATING SUBSTANCE - PLASTIC, POLYVINYL CHLORIDE OR RUBBER, POLYCHLOROPRENE INTERMEDIATE LAYER; ENVIRONMENTAL PROTECTION - FIRE RESISTANT AND WATER REPELLENT; FEAT PROVIDED - LINER; Special Features: HORIZONTAL REFLECTORIZED/FLUORESCENT CLOTH STRIPS PERMANENTLY STITCHED AROUND BOTTOMS OF LEGS; QUILTED LINER. 1 specification is documented in the U.S. Government catalog.
Is NSN 4210-01-166-7798 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.