PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4525Absorber,radio Frequency Radiati

Laird R & F Products, Inc. · NSN 6625-01-573-6038 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-573-6038 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-573-6038. Primary manufacturer part number: 4525.
Features
  • Absorber,radio Frequency Radiati — FSC 6625
  • Overall Thickness: 3.000 INCHES NOMINAL IN
  • Reference Data and Literature: SCD 520-13900
  • Frequency Rating: 2.0 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
  • Special Test Features: CALLED OUT IN SOURCE CONTROL DRAWING
  • Overall Thickness: 3.000 INCHES NOMINAL IN
  • Reference Data and Literature: SCD 520-13900
  • Frequency Rating: 2.0 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Absorber,radio Frequency Radiati, cataloged under National Stock Number 6625-01-573-6038, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Laird R & F Products, Inc.. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: SH.

Technical Specifications
ParameterValue
NSN6625-01-573-6038
Primary Part Number4525
Item NameAbsorber,radio Frequency Radiati
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerLaird R & F Products, Inc.
StatusACTIVE
Overall Thickness3.000 INCHES NOMINAL IN
Reference Data and LiteratureSCD 520-13900
Frequency Rating2.0 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
Special Test FeaturesCALLED OUT IN SOURCE CONTROL DRAWING
Overall Thickness3.000 INCHES NOMINAL IN
Reference Data and LiteratureSCD 520-13900
Frequency Rating2.0 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
Special Test FeaturesCALLED OUT IN SOURCE CONTROL DRAWING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueSH
SMR CodeJN
Weight6.0000 lbs
Cube1.0000 cu ft
Verified Substitutes 9
5340-00-050-1563179380 INTERCHANGEABLE
Plug,expansion
Chrysler Realty Company Llc Dba Daimler Chrysler
5920-00-142-74481019301PC2 INTERCHANGEABLE
Fuseholder,block
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-231-156740-12292 INTERCHANGEABLE
Transformer,power
Magnetic Components Inc
5360-00-821-88404525 INTERCHANGEABLE
Spring,helical,compression
Leslie Controls, Inc. Dba Leslie Controls Inc
5935-01-021-31217513NP INTERCHANGEABLE
Connector,plug,electrical
Bryant Electric
4820-01-050-16314-00746-0 INTERCHANGEABLE
Body,valve
Spence Engineering Co Inc Dba Nicholson Steam Trap
4030-01-142-483445-25 INTERCHANGEABLE
Shackle
Schaefer Marine, Inc.
5950-01-153-93953461645 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon
6530-01-233-44044525 INTERCHANGEABLE
Indicator,sterilization
Pymah Corp
Cross-Reference Index
Part NumberManufacturer
4525 PRIMARY Laird R & F Products, Inc. (USA)
520-13900-4 The Boeing Company Div Legacy Wichita (USA)
Related Parts
5340-00-050-1563INTERCHANGEABLE
PLUG,EXPANSION
179380
5920-00-142-7448INTERCHANGEABLE
FUSEHOLDER,BLOCK
1019301PC2
5950-00-231-1567INTERCHANGEABLE
TRANSFORMER,POWER
40-12292
5360-00-821-8840INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
4525
5935-01-021-3121INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
7513NP
4820-01-050-1631INTERCHANGEABLE
BODY,VALVE
4-00746-0
4030-01-142-4834INTERCHANGEABLE
SHACKLE
45-25
5950-01-153-9395INTERCHANGEABLE
TRANSFORMER,POWER
3461645
6530-01-233-4404INTERCHANGEABLE
INDICATOR,STERILIZATION
4525

Frequently Asked Questions

What is NSN 6625-01-573-6038?

NSN 6625-01-573-6038 is a Absorber,radio Frequency Radiati, manufactured by Laird R & F Products, Inc., classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-573-6038?

NSN 6625-01-573-6038 has 2 cross-referenced part numbers: 4525 (Laird R & F Products, Inc.), 520-13900-4 (The Boeing Company Div Legacy Wichita).

What NSN replaces 6625-01-573-6038?

There are 9 known substitutes for 6625-01-573-6038: 5340-00-050-1563, 5920-00-142-7448, 5950-00-231-1567 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4525?

Key specifications for 4525: Overall Thickness: 3.000 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: RADAR ABSORBER MATERIAL; Reference Data and Literature: SCD 520-13900; Special Features: 3IN CONVOLUTED RAM; REFLECTIVITY LESS THAN -13DB BETWEEN 2 AND 4GHZ, -20DB BETWEEN 4 AND 8GHZ, -25DB BETWEEN 8 AND 18GHZ GHz. 18 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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