PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7021O-Ring

Alnor Instrument Company · NSN 5331-01-067-1784 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-067-1784 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-067-1784. Primary manufacturer part number: 7021.
Features
  • O-Ring — FSC 5331
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • Cross-Sectional Height: 0.0625 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Alnor Instrument Company
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-01-067-1784, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Alnor Instrument Company. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-067-1784
Primary Part Number7021
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerAlnor Instrument Company
StatusACTIVE
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Cross-Sectional Height0.0625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-056-425839042-2483 INTERCHANGEABLE
Asbestos Sheet,compressed
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
5365-00-126-42147021 INTERCHANGEABLE
Bushing
Telemechanics Inc
5365-00-143-063469824-20 INTERCHANGEABLE
Ring,lock,keyed
Hamilton Sundstrand Corporation Dba Collins Aerospace
6250-00-223-4876156-126 INTERCHANGEABLE
Socket,lamp Starter
Safetran Systems Co Sub of Cci Corp
5325-00-276-5683 INTERCHANGEABLE
Post,snap Fastener
6695-00-566-5581GG807CY1 INTERCHANGEABLE
Transducer,motional Pickup
Northrop Grumman Systems Corporation
3620-00-571-5029 INTERCHANGEABLE
Press,molding,injection
6250-00-635-7334281-1076 REV 4 INTERCHANGEABLE
Lampholder
Raytheon Company Div Corp
2910-00-737-8050 INTERCHANGEABLE
Parts Kit,carburetor
6240-00-946-48104414A INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
Cross-Reference Index
Part NumberManufacturer
7021 PRIMARY Alnor Instrument Company (USA)
Related Parts
5330-00-056-4258INTERCHANGEABLE
ASBESTOS SHEET,COMPRESSED
39042-2483
5365-00-126-4214INTERCHANGEABLE
BUSHING
7021
5365-00-143-0634INTERCHANGEABLE
RING,LOCK,KEYED
69824-20
6250-00-223-4876INTERCHANGEABLE
SOCKET,LAMP STARTER
156-126
5325-00-276-5683INTERCHANGEABLE
POST,SNAP FASTENER
6695-00-566-5581INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
GG807CY1
3620-00-571-5029INTERCHANGEABLE
PRESS,MOLDING,INJECTION
6250-00-635-7334INTERCHANGEABLE
LAMPHOLDER
281-1076 REV 4
2910-00-737-8050INTERCHANGEABLE
PARTS KIT,CARBURETOR
6240-00-946-4810INTERCHANGEABLE
LAMP,INCANDESCENT
4414A
5330-00-962-4453INTERCHANGEABLE
ASBESTOS SHEET,COMPRESSED
2530-01-019-7195INTERCHANGEABLE
BRAKE SHOE

Frequently Asked Questions

What is NSN 5331-01-067-1784?

NSN 5331-01-067-1784 is a O-Ring, manufactured by Alnor Instrument Company, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-067-1784?

NSN 5331-01-067-1784 has 1 cross-referenced part number: 7021 (Alnor Instrument Company).

What NSN replaces 5331-01-067-1784?

There are 12 known substitutes for 5331-01-067-1784: 5330-00-056-4258, 5365-00-126-4214, 5365-00-143-0634 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7021?

Key specifications for 7021: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Cross-Sectional Height: 0.0625 INCHES NOMINAL IN. 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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