PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20637Insulator,washer

U M C Electronics Co · NSN 5970-01-010-8903 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-01-010-8903 — this item is cataloged by the U.S. Government under National Stock Number 5970-01-010-8903. Primary manufacturer part number: 20637.
Features
  • Insulator,washer — FSC 5970
  • Inside Diameter: 0.531 INCHES NOMINAL IN
  • Style Designator: ROUND, FLAT
  • Material: OVERALL,PLASTIC,PHENOL-FORMALDEHYDE/BAKELITE/,GRADE XX
  • Outside Diameter: 1.500 INCHES NOMINAL IN
  • Identification Code Color: BLACK
  • 1 verified cross-reference
  • Primary manufacturer: U M C Electronics Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Overall,plastic,phenol-Formaldehyde/bakelite/,grade Xx construction
General Description

The Insulator,washer, cataloged under National Stock Number 5970-01-010-8903, is classified within Federal Supply Class 5970 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is U M C Electronics Co. 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-01-010-8903
Primary Part Number20637
Item NameInsulator,washer
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerU M C Electronics Co
StatusACTIVE
Inside Diameter0.531 INCHES NOMINAL IN
Style DesignatorROUND, FLAT
MaterialOVERALL,PLASTIC,PHENOL-FORMALDEHYDE/BAKELITE/,GRADE XX
Outside Diameter1.500 INCHES NOMINAL IN
Identification Code ColorBLACK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5133-00-266-9247 INTERCHANGEABLE
Drill,twist
5330-00-328-4510 INTERCHANGEABLE
Gasket
5325-00-631-529220637 INTERCHANGEABLE
Ring,retaining
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
5342-00-777-764110-30191-23 INTERCHANGEABLE
Latch Assembly,cowl
The Boeing Company Div Legacy Wichita
1005-00-867-534511644080 INTERCHANGEABLE
Lining,clutch and B
U S Army Tank Automotive Command Amsta-Im-Mm
1660-00-942-856020637 INTERCHANGEABLE
Fitting,hose
Avox Systems Inc Dba Avox Systems Inc
5306-01-099-295120637 INTERCHANGEABLE
Bolt
Midwest Gear & Tool, Inc.
5950-01-269-8240 INTERCHANGEABLE
Transformer,current
5975-01-298-3729206-37 INTERCHANGEABLE
Conduit Assembly,flexible
Dcx-Chol Enterprises, Inc.
4730-01-517-1513C20637 INTERCHANGEABLE
Coupling,hose
Hydrasearch Company, Llc
Cross-Reference Index
Part NumberManufacturer
20637 U M C Electronics Co (USA)
Related Parts
5133-00-266-9247INTERCHANGEABLE
DRILL,TWIST
5330-00-328-4510INTERCHANGEABLE
GASKET
5325-00-631-5292INTERCHANGEABLE
RING,RETAINING
20637
5342-00-777-7641INTERCHANGEABLE
LATCH ASSEMBLY,COWL
10-30191-23
1005-00-867-5345INTERCHANGEABLE
LINING,CLUTCH AND B
11644080
1660-00-942-8560INTERCHANGEABLE
FITTING,HOSE
20637
5306-01-099-2951INTERCHANGEABLE
BOLT
20637
5950-01-269-8240INTERCHANGEABLE
TRANSFORMER,CURRENT
5975-01-298-3729INTERCHANGEABLE
CONDUIT ASSEMBLY,FLEXIBLE
206-37
4730-01-517-1513INTERCHANGEABLE
COUPLING,HOSE
C20637

Frequently Asked Questions

What is NSN 5970-01-010-8903?

NSN 5970-01-010-8903 is a Insulator,washer, manufactured by U M C Electronics Co, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-01-010-8903?

NSN 5970-01-010-8903 has 1 cross-referenced part number: 20637 (U M C Electronics Co).

What NSN replaces 5970-01-010-8903?

There are 10 known substitutes for 5970-01-010-8903: 5133-00-266-9247, 5330-00-328-4510, 5325-00-631-5292 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20637?

Key specifications for 20637: Inside Diameter: 0.531 INCHES NOMINAL IN; Style Designator: ROUND, FLAT; Material: OVERALL,PLASTIC,PHENOL-FORMALDEHYDE/BAKELITE/,GRADE XX; Special Features: SAME AS STYLE Q1,EXCEPT ONE EDGE CHAMFERED. 7 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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