PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

37819Spacer,ring

Pti Technologies Inc. · NSN 5365-00-558-1644 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-558-1644 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-558-1644. Primary manufacturer part number: 37819.
Features
  • Spacer,ring — FSC 5365
  • Outside Diameter: 1.360 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN
  • Material: ALUMINUM ALLOY 1100
  • Overall Thickness: 0.051 INCHES NOMINAL IN
  • Surface Treatment: ANODIZE
  • Material Document and Classification: QQ-A-250/1 FED SPEC SINGLE MATERIAL RESPONSE
  • Inside Diameter: 1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
  • 4 verified cross-references
Applications
  • Applications requiring Aluminum Alloy 1100 construction
General Description

The Spacer,ring, cataloged under National Stock Number 5365-00-558-1644, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pti Technologies Inc.. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5365-00-558-1644
Primary Part Number37819
Item NameSpacer,ring
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerPti Technologies Inc.
StatusACTIVE
Outside Diameter1.360 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN
MaterialALUMINUM ALLOY 1100
Overall Thickness0.051 INCHES NOMINAL IN
Surface TreatmentANODIZE
Material Document and ClassificationQQ-A-250/1 FED SPEC SINGLE MATERIAL RESPONSE
Inside Diameter1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5330-00-026-339537819 INTERCHANGEABLE
Gasket
A. O. Smith Corporation Dba a O Smith Corp
4820-00-621-5755N3781994 INTERCHANGEABLE
Diaphragm,valve,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-00-641-6975288047 INTERCHANGEABLE
Seal,plain Encased
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5307-00-881-244137819 INTERCHANGEABLE
Stud,plain
L3harris Technologies, Inc. Div Space and Airborne Systems
3110-00-902-3758071006 INTERCHANGEABLE
Bearing,roller,needle
Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems
4820-01-096-8899 INTERCHANGEABLE
Piston,valve
4710-01-396-518037819 INTERCHANGEABLE
Tube and Fittings,metallic
Exstar International Corporation
6150-01-412-765737819 INTERCHANGEABLE
Wiring Harness,branched
Tld Wollard Llc
5331-01-416-550037819 INTERCHANGEABLE
O-Ring
Alfa Laval Inc
5977-01-590-507637819 INTERCHANGEABLE
Arm,electrical Contact Brush
Evoqua Water Technologies Llc
Cross-Reference Index
Part NumberManufacturer
37819 Pti Technologies Inc. (USA)
40B887-104A112-16 Department of the Air Force (USA)
37819 Arvinmeritor Inc (USA)
5365PL1743674 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
5330-00-026-3395INTERCHANGEABLE
GASKET
37819
4820-00-621-5755INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
N3781994
5330-00-641-6975INTERCHANGEABLE
SEAL,PLAIN ENCASED
288047
5307-00-881-2441INTERCHANGEABLE
STUD,PLAIN
37819
3110-00-902-3758INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
071006
4820-01-096-8899INTERCHANGEABLE
PISTON,VALVE
4710-01-396-5180INTERCHANGEABLE
TUBE AND FITTINGS,METALLIC
37819
6150-01-412-7657INTERCHANGEABLE
WIRING HARNESS,BRANCHED
37819
5331-01-416-5500INTERCHANGEABLE
O-RING
37819
5977-01-590-5076INTERCHANGEABLE
ARM,ELECTRICAL CONTACT BRUSH
37819

Frequently Asked Questions

What is NSN 5365-00-558-1644?

NSN 5365-00-558-1644 is a Spacer,ring, manufactured by Pti Technologies Inc., classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-558-1644?

NSN 5365-00-558-1644 has 4 cross-referenced part numbers: 37819 (Pti Technologies Inc.), 40B887-104A112-16 (Department of the Air Force), 37819 (Arvinmeritor Inc), 5365PL1743674 (Jednolity Indeks Materialowy - Uniform Material Index).

What NSN replaces 5365-00-558-1644?

There are 10 known substitutes for 5365-00-558-1644: 5330-00-026-3395, 4820-00-621-5755, 5330-00-641-6975 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 37819?

Key specifications for 37819: Outside Diameter: 1.360 INCHES MINIMUM AND 1.370 INCHES MAXIMUM IN; Material: ALUMINUM ALLOY 1100; Overall Thickness: 0.051 INCHES NOMINAL IN; Surface Treatment: ANODIZE. 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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