PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A5991Spacer,sleeve

Grimes Aerospace Company · NSN 5365-00-043-0248 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-043-0248 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-043-0248. Primary manufacturer part number: A5991.
Features
  • Spacer,sleeve — FSC 5365
  • Body Outside Diameter: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
  • Corner Shape: SQUARE ALL CORNERS
  • Material: ALUMINUM ALLOY OVERALL
  • Body Inside Diameter: 0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • 1 verified cross-reference
  • Primary manufacturer: Grimes Aerospace Company
Applications
  • Applications requiring Aluminum Alloy Overall construction
General Description

The Spacer,sleeve, cataloged under National Stock Number 5365-00-043-0248, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Grimes Aerospace Company. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5365-00-043-0248
Primary Part NumberA5991
Item NameSpacer,sleeve
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerGrimes Aerospace Company
StatusACTIVE
Body Outside Diameter0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
Corner ShapeSQUARE ALL CORNERS
MaterialALUMINUM ALLOY OVERALL
Body Inside Diameter0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
3510-01-536-3278A-599-1 INTERCHANGEABLE
Casting,fork,piston
Forenta Lp
Cross-Reference Index
Part NumberManufacturer
A5991 PRIMARY Grimes Aerospace Company (USA)
Related Parts
3510-01-536-3278INTERCHANGEABLE
CASTING,FORK,PISTON
A-599-1

Frequently Asked Questions

What is NSN 5365-00-043-0248?

NSN 5365-00-043-0248 is a Spacer,sleeve, manufactured by Grimes Aerospace Company, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-043-0248?

NSN 5365-00-043-0248 has 1 cross-referenced part number: A5991 (Grimes Aerospace Company).

What NSN replaces 5365-00-043-0248?

There is 1 known substitute for 5365-00-043-0248: 3510-01-536-3278. Verify interchangeability with system specifications before substitution.

What are the specifications of A5991?

Key specifications for A5991: Body Outside Diameter: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN; Corner Shape: SQUARE ALL CORNERS; Material: ALUMINUM ALLOY OVERALL; Overall Length: 0.1200 INCHES MINIMUM AND 0.1300 INCHES MAXIMUM IN. 6 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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