PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

500-051Helmet,deep-Sea Diver's

Kirby Morgan Dive Systems Inc · NSN 4220-01-559-5538 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-559-5538 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-559-5538. Primary manufacturer part number: 500-051.
Features
  • Helmet,deep-Sea Diver's — FSC 4220
  • General Characteristics Item Description: MANUFACTURERS ITEM NAME IS K-37 HELMET W/MWP
  • Material: GLASS FIBER AND PLASTIC
  • 2 verified cross-references
  • Primary manufacturer: Kirby Morgan Dive Systems Inc
Applications
  • Applications requiring Glass Fiber and Plastic construction
General Description

The Helmet,deep-Sea Diver's, cataloged under National Stock Number 4220-01-559-5538, is classified within Federal Supply Class 4220 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Kirby Morgan Dive Systems Inc. Government technical data includes 2 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4220-01-559-5538
Primary Part Number500-051
Item NameHelmet,deep-Sea Diver's
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerKirby Morgan Dive Systems Inc
StatusACTIVE
General Characteristics Item DescriptionMANUFACTURERS ITEM NAME IS K-37 HELMET W/MWP
MaterialGLASS FIBER AND PLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5977-00-164-2003 INTERCHANGEABLE
Holder Assembly,electrical Conta
5841-01-067-2676342C195H06 INTERCHANGEABLE
Wrapper,spiral,cable Harness
Northrop Grumman Support Services Corp
4310-01-073-17905000-5-1 INTERCHANGEABLE
Compressor Unit,reciprocating
Altec Air, Llc Dba Altec Llc
4930-01-269-227350-0051 INTERCHANGEABLE
Refueling System,aviation Tactic
Garsite Tsr Inc
5945-01-276-55491978067-105 INTERCHANGEABLE
Relay,electromagnetic
Northrop Grumman Systems Corporation
5962-01-303-146550005-1 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
3020-01-393-463950005-1 INTERCHANGEABLE
Gear,bevel
Morpac Industries, Inc Div Actuator
4730-01-463-7080580-538 INTERCHANGEABLE
Swivel Joint,hydraulic
Titan Tool Inc
5935-01-549-5653500-051NF2JU6-09 INTERCHANGEABLE
Cover and Guard,electrical Conne
Glenair, Inc.
5315-01-613-46885000-51 INTERCHANGEABLE
Pin,spring
Pdi Ground Support Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
4220PL0718169 Jednolity Indeks Materialowy - Uniform Material Index (POL)
500-051 PRIMARY Kirby Morgan Dive Systems Inc (USA)
Related Parts
5977-00-164-2003INTERCHANGEABLE
HOLDER ASSEMBLY,ELECTRICAL CONTA
5841-01-067-2676INTERCHANGEABLE
WRAPPER,SPIRAL,CABLE HARNESS
342C195H06
4310-01-073-1790INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
5000-5-1
4930-01-269-2273INTERCHANGEABLE
REFUELING SYSTEM,AVIATION TACTIC
50-0051
5945-01-276-5549INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
1978067-105
5962-01-303-1465INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
50005-1
3020-01-393-4639INTERCHANGEABLE
GEAR,BEVEL
50005-1
4730-01-463-7080INTERCHANGEABLE
SWIVEL JOINT,HYDRAULIC
580-538
5935-01-549-5653INTERCHANGEABLE
COVER AND GUARD,ELECTRICAL CONNE
500-051NF2JU6-09
5315-01-613-4688INTERCHANGEABLE
PIN,SPRING
5000-51
5325-01-644-2442INTERCHANGEABLE
RING,RETAINING
206048-1

Frequently Asked Questions

What is NSN 4220-01-559-5538?

NSN 4220-01-559-5538 is a Helmet,deep-Sea Diver's, manufactured by Kirby Morgan Dive Systems Inc, classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-559-5538?

NSN 4220-01-559-5538 has 2 cross-referenced part numbers: 4220PL0718169 (Jednolity Indeks Materialowy - Uniform Material Index), 500-051 (Kirby Morgan Dive Systems Inc).

What NSN replaces 4220-01-559-5538?

There are 11 known substitutes for 4220-01-559-5538: 5977-00-164-2003, 5841-01-067-2676, 4310-01-073-1790 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 500-051?

Key specifications for 500-051: General Characteristics Item Description: MANUFACTURERS ITEM NAME IS K-37 HELMET W/MWP; Special Features: SIDE AND TOP WEIGHTS; FIBERGLASS AND CARBON-FIBER SHELL; DEFOGGING STEADY FLOW VALVE; EGS VALVE; HEAD CUSHION; AIRTRAIN; SILICONE ORAL/NASAL MASK; NOSE BLOCK DEVICE; SUPERFLOW 350; GAS SUPPLY NON-RETURN VALVE; RAPID CHANGE MODULAR COMMUNICATIONS; POSITIVE LOCK WITH LATCH SYSTEM; QUAD-VALVE EXHAUST SYSTEM; INTERNAL ADJUSTING CHIN STRAP; ADJUSTING NECK PAD; Material: GLASS FIBER AND PLASTIC. 3 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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