PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51498Clamp,lens,respirator

3m Company · NSN 4240-01-251-3273 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-251-3273 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-251-3273. Primary manufacturer part number: 51498.
Features
  • Clamp,lens,respirator — FSC 4240
  • General Characteristics Item Description: SOLE SOURCE REQUIRED BY STATUTE 6.302
  • Criticality Code Justification: TEXT
  • 3 verified cross-references
  • Primary manufacturer: 3m Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Clamp,lens,respirator, cataloged under National Stock Number 4240-01-251-3273, 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 3m Company. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4240-01-251-3273
Primary Part Number51498
Item NameClamp,lens,respirator
FSC / FSG4240 / 42 — No Item Name Available
Manufacturer3m Company
StatusACTIVE
General Characteristics Item DescriptionSOLE SOURCE REQUIRED BY STATUTE 6.302
Criticality Code JustificationTEXT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
8345-00-138-7137 INTERCHANGEABLE
Flag,individual
3120-00-187-9041REM-4H7 INTERCHANGEABLE
Bearing,plain,rod End
Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc
8345-00-237-4507 INTERCHANGEABLE
Flag,individual
5940-00-411-84902026 INTERCHANGEABLE
Terminal,lug
Control Products Corporation
2530-00-741-00191308-111-002 INTERCHANGEABLE
Armature Left
Warner Electric Brake and Clutch Co Hq
4820-00-914-3686 INTERCHANGEABLE
Valve,globe
8345-01-007-9131 INTERCHANGEABLE
Flag,individual
2590-01-180-280651498 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
4520-01-513-168551498 INTERCHANGEABLE
Heating Element,electrical,nonim
Wells Mfg Co
Cross-Reference Index
Part NumberManufacturer
51498 3m Company (USA)
51498 Aearo Company (USA)
51498 Aearo Company 1 Dba Aearo Div Ao Safety Occupational Prescription Eyewear (USA)
Related Parts
8345-00-138-7137INTERCHANGEABLE
FLAG,INDIVIDUAL
3120-00-187-9041INTERCHANGEABLE
BEARING,PLAIN,ROD END
REM-4H7
8345-00-237-4507INTERCHANGEABLE
FLAG,INDIVIDUAL
5940-00-411-8490INTERCHANGEABLE
TERMINAL,LUG
2026
2530-00-741-0019INTERCHANGEABLE
ARMATURE LEFT
1308-111-002
4820-00-914-3686INTERCHANGEABLE
VALVE,GLOBE
8345-01-007-9131INTERCHANGEABLE
FLAG,INDIVIDUAL
2590-01-180-2806INTERCHANGEABLE
FILTER ELEMENT,FLUID
51498
4520-01-513-1685INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
51498

Frequently Asked Questions

What is NSN 4240-01-251-3273?

NSN 4240-01-251-3273 is a Clamp,lens,respirator, manufactured by 3m Company, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-251-3273?

NSN 4240-01-251-3273 has 3 cross-referenced part numbers: 51498 (3m Company), 51498 (Aearo Company), 51498 (Aearo Company 1 Dba Aearo Div Ao Safety Occupational Prescription Eyewear).

What NSN replaces 4240-01-251-3273?

There are 9 known substitutes for 4240-01-251-3273: 8345-00-138-7137, 3120-00-187-9041, 8345-00-237-4507 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51498?

Key specifications for 51498: End Item Identification: AMERICAN OPTICAL MODEL 7 STAR SERIES 7700 AND 7800 RESPIRATOR; General Characteristics Item Description: SOLE SOURCE REQUIRED BY STATUTE 6.302; Criticality Code Justification: TEXT. 3 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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