PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11987O-Ring

Aimpoint Inc Dba Aimpoint Inc · NSN 5331-01-442-4502 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-442-4502 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-442-4502. Primary manufacturer part number: 11987.
Features
  • O-Ring — FSC 5331
  • 2 verified cross-references
  • Primary manufacturer: Aimpoint Inc Dba Aimpoint Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-442-4502, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Aimpoint Inc Dba Aimpoint Inc. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersAimpoint Inc Dba Aimpoint Inc (CAGE 3J629)
Technical Specifications
ParameterValue
NSN5331-01-442-4502
Primary Part Number11987
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerAimpoint Inc Dba Aimpoint Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5950-00-283-738911987 INTERCHANGEABLE
Reactor
Inrcore, Llc Div Inrcore
5815-00-356-3326SC-B-70054 INTERCHANGEABLE
Teletypewriter Subassembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-370-9457 INTERCHANGEABLE
Spring
5950-00-449-2808040-11987-001 INTERCHANGEABLE
Transformer,power
Astec America Inc.
1650-00-737-086111987 INTERCHANGEABLE
Cap,valve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5995-00-858-654711987 INTERCHANGEABLE
Cord Assembly,electrical
Audiosears Corp Dba Audiosears Corp
6505-01-135-426512-825 INTERCHANGEABLE
Hemodialysis Solution,concentrat
Cobe Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
11987 PRIMARY Aimpoint Inc Dba Aimpoint Inc (USA)
05680711 Aimpoint Inc Dba Aimpoint Inc (USA)
Related Parts
5950-00-283-7389INTERCHANGEABLE
REACTOR
11987
5815-00-356-3326INTERCHANGEABLE
TELETYPEWRITER SUBASSEMBLY
SC-B-70054
5360-00-370-9457INTERCHANGEABLE
SPRING
5950-00-449-2808INTERCHANGEABLE
TRANSFORMER,POWER
040-11987-001
1650-00-737-0861INTERCHANGEABLE
CAP,VALVE
11987
5995-00-858-6547INTERCHANGEABLE
CORD ASSEMBLY,ELECTRICAL
11987
6505-01-135-4265INTERCHANGEABLE
HEMODIALYSIS SOLUTION,CONCENTRAT
12-825

Frequently Asked Questions

What is NSN 5331-01-442-4502?

NSN 5331-01-442-4502 is a O-Ring, manufactured by Aimpoint Inc Dba Aimpoint Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-442-4502?

NSN 5331-01-442-4502 has 2 cross-referenced part numbers: 11987 (Aimpoint Inc Dba Aimpoint Inc), 05680711 (Aimpoint Inc Dba Aimpoint Inc).

What NSN replaces 5331-01-442-4502?

There are 7 known substitutes for 5331-01-442-4502: 5950-00-283-7389, 5815-00-356-3326, 5360-00-370-9457 and 4 more. Verify interchangeability with system specifications before substitution.

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