PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

99-638Plug,machine Thread

Donallco Inc · NSN 5365-00-278-8797 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-278-8797 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-278-8797. Primary manufacturer part number: 99-638.
Features
  • Plug,machine Thread — FSC 5365
  • Core Depth: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
  • Bleeder Hole Diameter: 0.062 INCHES NOMINAL IN
  • Material: STEEL COMP 1137 OVERALL
  • Nominal Thread Size: 0.438 INCHES EXTERNAL IN
  • Thread Direction: RIGHT-HAND EXTERNAL
  • Thread Class: 3A EXTERNAL A
  • Thread Length: 0.300 INCHES NOMINAL EXTERNAL IN
Applications
  • Applications requiring Steel Comp 1137 Overall construction
General Description

The Plug,machine Thread, cataloged under National Stock Number 5365-00-278-8797, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Donallco Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5365-00-278-8797
Primary Part Number99-638
Item NamePlug,machine Thread
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerDonallco Inc
StatusCANCELLED
Core Depth0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Bleeder Hole Diameter0.062 INCHES NOMINAL IN
MaterialSTEEL COMP 1137 OVERALL
Nominal Thread Size0.438 INCHES EXTERNAL IN
Thread DirectionRIGHT-HAND EXTERNAL
Thread Class3A EXTERNAL A
Thread Length0.300 INCHES NOMINAL EXTERNAL IN
Thread Series DesignatorUNF EXTERNAL
Head Height0.250 INCHES NOMINAL IN
Style DesignatorPLUG, MACHINE W/BLEEDER HOLES
Surface TreatmentCADMIUM OVERALL
Connection StylePLAIN
Bleeder Hole Center to Threaded End Distance0.188 INCHES NOMINAL IN
Body Core Diameter0.171 INCHES NOMINAL IN
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
4730-00-001-7800205200 INTERCHANGEABLE
Fitting,lubrication
Mcneil Ohio Corp
2815-01-234-78064095009 INTERCHANGEABLE
Pin,piston
Cummins Inc.
2520-01-337-43482-05200 INTERCHANGEABLE
Disk,clutch,vehicular
Rockford Powertrain Inc Div Powertrain Rockford, Inc.
4820-01-515-716240611-8 PC NO 30 INTERCHANGEABLE
Seat,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
99-638 Donallco Inc (USA)
MILF5509 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AN814-4L Aeronautical Standards Group Dept of Navy and Air Force (USA)
890132PC205200 Certified Trailer Repair Co (USA)
99-638 Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
205200 Certified Trailer Repair Co (USA)
890132LIST517ITEM54 Certified Trailer Repair Co (USA)
8186478 Us Army Aviation and Missile Command (USA)
Related Parts
4730-00-001-7800INTERCHANGEABLE
FITTING,LUBRICATION
205200
2815-01-234-7806INTERCHANGEABLE
PIN,PISTON
4095009
2520-01-337-4348INTERCHANGEABLE
DISK,CLUTCH,VEHICULAR
2-05200
4820-01-515-7162INTERCHANGEABLE
SEAT,VALVE
40611-8 PC NO 30

Frequently Asked Questions

What is NSN 5365-00-278-8797?

NSN 5365-00-278-8797 is a Plug,machine Thread, manufactured by Donallco Inc, classified under FSC 5365 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5365-00-278-8797?

NSN 5365-00-278-8797 has 8 cross-referenced part numbers: 99-638 (Donallco Inc), MILF5509 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AN814-4L (Aeronautical Standards Group Dept of Navy and Air Force), 890132PC205200 (Certified Trailer Repair Co), 99-638 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us) and 3 more.

What NSN replaces 5365-00-278-8797?

There are 4 known substitutes for 5365-00-278-8797: 4730-00-001-7800, 2815-01-234-7806, 2520-01-337-4348 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 99-638?

Key specifications for 99-638: Core Depth: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Bleeder Hole Diameter: 0.062 INCHES NOMINAL IN; Material: STEEL COMP 1137 OVERALL; Nominal Thread Size: 0.438 INCHES EXTERNAL IN. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5365-00-278-8797 still in active supply?

NSN 5365-00-278-8797 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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