PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M311Frequency Standard

Ryan International Corporation · NSN 6625-00-910-2557 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-910-2557 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-910-2557. Primary manufacturer part number: M311.
Features
  • Frequency Standard — FSC 6625
  • 1 verified cross-reference
  • Primary manufacturer: Ryan International Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Frequency Standard, cataloged under National Stock Number 6625-00-910-2557, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ryan International Corporation. This item has 1 commercial cross-reference 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.

Technical Specifications
ParameterValue
NSN6625-00-910-2557
Primary Part NumberM311
Item NameFrequency Standard
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerRyan International Corporation
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Weight40.0000 lbs
Cube7.9965 cu ft
Verified Substitutes 7
3020-00-231-873540CL INTERCHANGEABLE
Link,roller Chain
Union Chain Div of Ust Inc
2910-00-361-74291-170811 INTERCHANGEABLE
Parts Kit,carburetor
Hdt Expeditionary Systems Inc
5120-00-473-77686248183 INTERCHANGEABLE
Wrench,track Suppor
U S Army Tank Automotive Command Amsta-Im-Mm
5821-00-879-370161A44D1 INTERCHANGEABLE
Control,radio Set
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5945-01-339-4322M31-1 INTERCHANGEABLE
Relay,solid State
Teledyne Solid State Products Div Teledyne Industries Sub of Teledyne Inc
4530-01-374-2763 INTERCHANGEABLE
Millboard,non-Asbestos
6105-01-406-0439 INTERCHANGEABLE
Motor,alternating Current
Cross-Reference Index
Part NumberManufacturer
M311 PRIMARY Ryan International Corporation (USA)
Related Parts
3020-00-231-8735INTERCHANGEABLE
LINK,ROLLER CHAIN
40CL
2910-00-361-7429INTERCHANGEABLE
PARTS KIT,CARBURETOR
1-170811
5120-00-473-7768INTERCHANGEABLE
WRENCH,TRACK SUPPOR
6248183
5821-00-879-3701INTERCHANGEABLE
CONTROL,RADIO SET
61A44D1
5945-01-339-4322INTERCHANGEABLE
RELAY,SOLID STATE
M31-1
4530-01-374-2763INTERCHANGEABLE
MILLBOARD,NON-ASBESTOS
6105-01-406-0439INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT

Frequently Asked Questions

What is NSN 6625-00-910-2557?

NSN 6625-00-910-2557 is a Frequency Standard, manufactured by Ryan International Corporation, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-910-2557?

NSN 6625-00-910-2557 has 1 cross-referenced part number: M311 (Ryan International Corporation).

What NSN replaces 6625-00-910-2557?

There are 7 known substitutes for 6625-00-910-2557: 3020-00-231-8735, 2910-00-361-7429, 5120-00-473-7768 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M311?

Key specifications for M311: End Item Identification: SM-80 HEATH; End Item Identification: SM-80 HEATH. 2 total characteristics are documented in the Federal Logistics Information System.

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