PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3985Boot,dust and Moisture Seal

Crystal Engineering Corp · NSN 5340-01-628-2766 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-628-2766 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-628-2766. Primary manufacturer part number: 3985.
Features
  • Boot,dust and Moisture Seal — FSC 5340
  • 1 verified cross-reference
  • Primary manufacturer: Crystal Engineering Corp
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Boot,dust and Moisture Seal, cataloged under National Stock Number 5340-01-628-2766, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Crystal Engineering Corp. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-01-628-2766
Primary Part Number3985
Item NameBoot,dust and Moisture Seal
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerCrystal Engineering Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 3
5120-00-540-4134398-5 INTERCHANGEABLE
Pot,melting
C. S. Osborne and Company Dba Cs Osborne & Co
4310-00-625-2961P-3986 INTERCHANGEABLE
Filter Element,intake Air Cleane
Altec Air, Llc Dba Altec Llc
3950-01-268-82353985 INTERCHANGEABLE
Slew Unit Assembly
Lake Shore Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
3985 Crystal Engineering Corp (USA)
Related Parts
5120-00-540-4134INTERCHANGEABLE
POT,MELTING
398-5
4310-00-625-2961INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
P-3986
3950-01-268-8235INTERCHANGEABLE
SLEW UNIT ASSEMBLY
3985

Frequently Asked Questions

What is NSN 5340-01-628-2766?

NSN 5340-01-628-2766 is a Boot,dust and Moisture Seal, manufactured by Crystal Engineering Corp, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-628-2766?

NSN 5340-01-628-2766 has 1 cross-referenced part number: 3985 (Crystal Engineering Corp).

What NSN replaces 5340-01-628-2766?

There are 3 known substitutes for 5340-01-628-2766: 5120-00-540-4134, 4310-00-625-2961, 3950-01-268-8235. Verify interchangeability with system specifications before substitution.

What are the specifications of 3985?

Key specifications for 3985: Special Features: SHOCK RESISTANT PROTECTION,LOW DUROMETER,SKYDROL RESISTANT.; Part Name Assigned by Controlling Agency: PROTECTIVE BOOT. 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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