PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6131-5O-Ring

Kovatch Corp. · NSN 5331-01-135-3478 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-135-3478 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-135-3478. Primary manufacturer part number: 6131-5.
Features
  • O-Ring — FSC 5331
  • 3 verified cross-references
  • Primary manufacturer: Kovatch Corp.
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-135-3478, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Kovatch Corp.. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersKovatch Corp. (CAGE 59556); Philadelphia Valve Co (CAGE 77254); Kovatch Mobile Equipment Corp. Dba Kme (CAGE 0H4A9)
Technical Specifications
ParameterValue
NSN5331-01-135-3478
Primary Part Number6131-5
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerKovatch Corp.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5970-00-117-5155 INTERCHANGEABLE
Insulator,standoff
5330-00-599-508547394 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
1680-01-147-833761315 INTERCHANGEABLE
Pan Bottom,seat
B E Aerospace Inc Services Div
3110-01-367-9000N61315 INTERCHANGEABLE
Ring,bearing,outer
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
6131-5 PRIMARY Kovatch Corp. (USA)
6131-5 Philadelphia Valve Co (USA)
6131-5 Kovatch Mobile Equipment Corp. Dba Kme (USA)
Related Parts
5970-00-117-5155INTERCHANGEABLE
INSULATOR,STANDOFF
5330-00-599-5085INTERCHANGEABLE
SEAL,PLAIN ENCASED
47394
1680-01-147-8337INTERCHANGEABLE
PAN BOTTOM,SEAT
61315
3110-01-367-9000INTERCHANGEABLE
RING,BEARING,OUTER
N61315

Frequently Asked Questions

What is NSN 5331-01-135-3478?

NSN 5331-01-135-3478 is a O-Ring, manufactured by Kovatch Corp., classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-135-3478?

NSN 5331-01-135-3478 has 3 cross-referenced part numbers: 6131-5 (Kovatch Corp.), 6131-5 (Philadelphia Valve Co), 6131-5 (Kovatch Mobile Equipment Corp. Dba Kme).

What NSN replaces 5331-01-135-3478?

There are 4 known substitutes for 5331-01-135-3478: 5970-00-117-5155, 5330-00-599-5085, 1680-01-147-8337 and 1 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com