PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N791Helmet,welder's

W.w. Grainger, Inc. Div Government Sales Division · NSN 4240-01-477-5367 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-477-5367 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-477-5367. Primary manufacturer part number: 1N791.
Features
  • Helmet,welder's — FSC 4240
  • Facepiece Type: AUTO DARKING; REQ 2AAA BATTERIES
  • 4 verified cross-references
  • Primary manufacturer: W.w. Grainger, Inc. Div Government Sales Division
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Helmet,welder's, cataloged under National Stock Number 4240-01-477-5367, 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 W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 1 verified specification, 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4240-01-477-5367
Primary Part Number1N791
Item NameHelmet,welder's
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerW.w. Grainger, Inc. Div Government Sales Division
StatusACTIVE
Facepiece TypeAUTO DARKING; REQ 2AAA BATTERIES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5930-00-009-34168439119 INTERCHANGEABLE
Switch,rotary
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5985-00-160-22967913364-1 INTERCHANGEABLE
Attenuator,variable
Us Army Aviation and Missile Command
2805-00-356-083029711 INTERCHANGEABLE
Piston,internal Combustion Engin
Briggs and Stratton Corp
5961-00-400-1976 INTERCHANGEABLE
Semiconductor Device,diode
4310-00-974-9454 INTERCHANGEABLE
Switch and Valve Assembly,unload
5940-01-223-248729711 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation
4810-01-582-777029711 INTERCHANGEABLE
Stem,fluid Valve
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
9150-01-728-5465234337 INTERCHANGEABLE
Grease,utility
Loctite Corp
Cross-Reference Index
Part NumberManufacturer
1N791 Grainger W W Inc Grainger Br No 906 (USA)
1N791 PRIMARY W.w. Grainger, Inc. Div Government Sales Division (USA)
29711 Surewerx Usa Inc (USA)
S26400 PRIMARY Surewerx Usa Inc (USA)
Related Parts
5930-00-009-3416INTERCHANGEABLE
SWITCH,ROTARY
8439119
5985-00-160-2296INTERCHANGEABLE
ATTENUATOR,VARIABLE
7913364-1
2805-00-356-0830INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
29711
5961-00-400-1976INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
4310-00-974-9454INTERCHANGEABLE
SWITCH AND VALVE ASSEMBLY,UNLOAD
5940-01-223-2487INTERCHANGEABLE
TERMINAL,LUG
29711
4810-01-582-7770INTERCHANGEABLE
STEM,FLUID VALVE
29711
9150-01-728-5465INTERCHANGEABLE
GREASE,UTILITY
234337

Frequently Asked Questions

What is NSN 4240-01-477-5367?

NSN 4240-01-477-5367 is a Helmet,welder's, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-477-5367?

NSN 4240-01-477-5367 has 4 cross-referenced part numbers: 1N791 (Grainger W W Inc Grainger Br No 906), 1N791 (W.w. Grainger, Inc. Div Government Sales Division), 29711 (Surewerx Usa Inc), S26400 (Surewerx Usa Inc).

What NSN replaces 4240-01-477-5367?

There are 8 known substitutes for 4240-01-477-5367: 5930-00-009-3416, 5985-00-160-2296, 2805-00-356-0830 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1N791?

Key specifications for 1N791: Special Features: SUPER SLIM AND COOL; SILVER COATED NYLON; Facepiece Type: AUTO DARKING; REQ 2AAA BATTERIES. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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