PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A25A509-139-101Gasket Shield

Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions · NSN 5999-00-138-5378 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-138-5378 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-138-5378. Primary manufacturer part number: A25A509-139-101.
Features
  • Gasket Shield — FSC 5999
  • 2 verified cross-references
  • Primary manufacturer: Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Gasket Shield, cataloged under National Stock Number 5999-00-138-5378, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameGasket Shield
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersLockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions (CAGE 99696); Technical Wire Products, Llc Dba Twp (CAGE 07700)
Successor NSN5998-01-576-1991 — Circuit Card Assembly
Technical Specifications
ParameterValue
NSN5999-00-138-5378
Primary Part NumberA25A509-139-101
Item NameGasket Shield
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5998-01-576-1991 (130051)
HAZMATNo
Weight0.0500 lbs
Cube0.0045 cu ft
Verified Substitutes 10
5998-01-576-1991130051 SUCCESSOR
Circuit Card Assembly
Sunhillo Corp
6210-00-279-30555200-242-604RED INTERCHANGEABLE
Light,indicator
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
3120-00-371-0148130051 INTERCHANGEABLE
Bearing,sleeve
Eaton Aerospace, Llc Dba Jackson South
3020-00-622-1283 INTERCHANGEABLE
Ratchet Wheel
5962-01-265-9375L03870 INTERCHANGEABLE
Microcircuit,digital
Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)
5310-01-412-1890130051 INTERCHANGEABLE
Washer,lock
Butler Products, Inc.
5310-01-468-6279130051 INTERCHANGEABLE
Nut,clip-on
Monadnock Company, the Dba Lisi Aerospace
5962-01-520-6479 INTERCHANGEABLE
Microcircuit,digital
4710-01-600-9278130051 INTERCHANGEABLE
Tube Assembly,metal
Crown Equipment Corp Dba Crown Lift Trucks Div Government Sales Department
4920-01-626-2714130051 INTERCHANGEABLE
Fixture,aircraft Maintenance
Howmet Global Fastening Systems Inc
Cross-Reference Index
Part NumberManufacturer
A25A509-139-101 Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions (USA)
130051 Technical Wire Products, Llc Dba Twp (USA)
Related Parts
SUCCESSOR 5998-01-576-1991 Circuit Card Assembly · 130051
6210-00-279-3055INTERCHANGEABLE
LIGHT,INDICATOR
5200-242-604RED
3120-00-371-0148INTERCHANGEABLE
BEARING,SLEEVE
130051
3020-00-622-1283INTERCHANGEABLE
RATCHET WHEEL
5962-01-265-9375INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
L03870
5310-01-412-1890INTERCHANGEABLE
WASHER,LOCK
130051
5310-01-468-6279INTERCHANGEABLE
NUT,CLIP-ON
130051
5962-01-520-6479INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
4710-01-600-9278INTERCHANGEABLE
TUBE ASSEMBLY,METAL
130051
4920-01-626-2714INTERCHANGEABLE
FIXTURE,AIRCRAFT MAINTENANCE
130051

Frequently Asked Questions

What is NSN 5999-00-138-5378?

NSN 5999-00-138-5378 is a Gasket Shield, manufactured by Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-138-5378?

NSN 5999-00-138-5378 has 2 cross-referenced part numbers: A25A509-139-101 (Lockheed Martin Corporation Div Lockheed Martin Systems & Global Solutions), 130051 (Technical Wire Products, Llc Dba Twp).

What NSN replaces 5999-00-138-5378?

There are 10 known substitutes for 5999-00-138-5378: 5998-01-576-1991, 6210-00-279-3055, 3120-00-371-0148 and 7 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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