PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1028-74Subassembly,regulator,first-Stag

Aqualung Usa, Inc · NSN 1660-01-440-9604 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-01-440-9604 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-440-9604. Primary manufacturer part number: 1028-74.
Features
  • Subassembly,regulator,first-Stag — FSC 1660
  • 3 verified cross-references
  • Primary manufacturer: Aqualung Usa, Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Subassembly,regulator,first-Stag, cataloged under National Stock Number 1660-01-440-9604, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Aqualung Usa, Inc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1660-01-440-9604
Primary Part Number1028-74
Item NameSubassembly,regulator,first-Stag
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerAqualung Usa, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5815-00-160-0076 INTERCHANGEABLE
Suppressor,electric
2530-00-174-908316A2917 INTERCHANGEABLE
Governor Assembly,air Brake
Napco International Llc Dba Napco International Inc
4320-00-425-5688A-123584 INTERCHANGEABLE
Pump,rotary
Komatsu America Corporation
5905-00-931-3139L100J20K INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5310-00-955-3113 INTERCHANGEABLE
Washer,shouldered
5331-01-613-8287102874 INTERCHANGEABLE
O-Ring
M. E. Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
1028-74 PRIMARY Aqualung Usa, Inc (USA)
1586AS302-3 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
M100674 Aqualung Usa, Inc (USA)
Related Parts
5815-00-160-0076INTERCHANGEABLE
SUPPRESSOR,ELECTRIC
2530-00-174-9083INTERCHANGEABLE
GOVERNOR ASSEMBLY,AIR BRAKE
16A2917
4320-00-425-5688INTERCHANGEABLE
PUMP,ROTARY
A-123584
5905-00-931-3139INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
L100J20K
5310-00-955-3113INTERCHANGEABLE
WASHER,SHOULDERED
5331-01-613-8287INTERCHANGEABLE
O-RING
102874

Frequently Asked Questions

What is NSN 1660-01-440-9604?

NSN 1660-01-440-9604 is a Subassembly,regulator,first-Stag, manufactured by Aqualung Usa, Inc, classified under FSC 1660 (No Item Name Available). Status: active.

What are the part numbers for NSN 1660-01-440-9604?

NSN 1660-01-440-9604 has 3 cross-referenced part numbers: 1028-74 (Aqualung Usa, Inc), 1586AS302-3 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), M100674 (Aqualung Usa, Inc).

What NSN replaces 1660-01-440-9604?

There are 6 known substitutes for 1660-01-440-9604: 5815-00-160-0076, 2530-00-174-9083, 4320-00-425-5688 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1028-74?

Key specifications for 1028-74: End Item Identification: PREPROVISIONING SUPPORT NAVICP IS POE. 1 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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