PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4001-300Lip Bumper

Masel Co · NSN 6520-01-521-2446 · FSC 6520 · No Item Name Available
Verified by PartsTable
NSN 6520-01-521-2446 — this item is cataloged by the U.S. Government under National Stock Number 6520-01-521-2446. Primary manufacturer part number: 4001-300.
Features
  • Lip Bumper — FSC 6520
  • 1 verified cross-reference
  • Primary manufacturer: Masel Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Lip Bumper, cataloged under National Stock Number 6520-01-521-2446, is classified within Federal Supply Class 6520 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Masel Co. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6520-01-521-2446
Primary Part Number4001-300
Item NameLip Bumper
FSC / FSG6520 / 65 — No Item Name Available
ManufacturerMasel Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5330-01-234-03094001300 INTERCHANGEABLE
Gasket
Phoenix Products Llc Dba Phoenix Lighting Products Llc
Cross-Reference Index
Part NumberManufacturer
4001-300 PRIMARY Masel Co (USA)
Related Parts
5330-01-234-0309INTERCHANGEABLE
GASKET
4001300

Frequently Asked Questions

What is NSN 6520-01-521-2446?

NSN 6520-01-521-2446 is a Lip Bumper, manufactured by Masel Co, classified under FSC 6520 (No Item Name Available). Status: active.

What are the part numbers for NSN 6520-01-521-2446?

NSN 6520-01-521-2446 has 1 cross-referenced part number: 4001-300 (Masel Co).

What NSN replaces 6520-01-521-2446?

There is 1 known substitute for 6520-01-521-2446: 5330-01-234-0309. Verify interchangeability with system specifications before substitution.

What are the specifications of 4001-300?

Key specifications for 4001-300: Special Features: ORTHOCOSMETIC. 1 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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