PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21158/1Coupler,rotary,radio Frequency

Frontgrade Technologies Inc. · NSN 5985-01-442-5265 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-442-5265 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-442-5265. Primary manufacturer part number: 21158/1.
Features
  • Coupler,rotary,radio Frequency — FSC 5985
  • 4 verified cross-references
  • Primary manufacturer: Frontgrade Technologies Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-01-442-5265, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Frontgrade Technologies Inc.. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-442-5265
Primary Part Number21158/1
Item NameCoupler,rotary,radio Frequency
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerFrontgrade Technologies Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5342-00-055-264221158-1 INTERCHANGEABLE
Mount,resilient,weapon System
Hutchinson Aerospace & Industry, Inc. Dba Barry Wright Corp
3110-00-100-03312B2631 INTERCHANGEABLE
Cup,tapered Roller Bearing
Caterpillar Inc Div Caterpillar Defense
1630-00-483-7671211581 INTERCHANGEABLE
Piston,brake Cylind
Hydro-Aire Aerospace Corp
Cross-Reference Index
Part NumberManufacturer
21158/1 Frontgrade Technologies Inc. (USA)
RC1111OH1 Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division (USA)
RC1111OH1 Frontgrade Technologies Inc. (USA)
21158/1 Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division (USA)
Related Parts
5342-00-055-2642INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
21158-1
3110-00-100-0331INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
2B2631
1630-00-483-7671INTERCHANGEABLE
PISTON,BRAKE CYLIND
211581

Frequently Asked Questions

What is NSN 5985-01-442-5265?

NSN 5985-01-442-5265 is a Coupler,rotary,radio Frequency, manufactured by Frontgrade Technologies Inc., classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-442-5265?

NSN 5985-01-442-5265 has 4 cross-referenced part numbers: 21158/1 (Frontgrade Technologies Inc.), RC1111OH1 (Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division), RC1111OH1 (Frontgrade Technologies Inc.), 21158/1 (Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division).

What NSN replaces 5985-01-442-5265?

There are 3 known substitutes for 5985-01-442-5265: 5342-00-055-2642, 3110-00-100-0331, 1630-00-483-7671. Verify interchangeability with system specifications before substitution.

What are the specifications of 21158/1?

Key specifications for 21158/1: End Item Identification: AN/FSQ-151(V); Special Features: ROTARY JOINT, SPECIAL, AFSCN/CUE. 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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