PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1206Washer,lock

Eaton Williams Group Ltd · NSN 5310-00-187-7070 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-187-7070 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-187-7070. Primary manufacturer part number: 1206.
Features
  • Washer,lock — FSC 5310
  • Material: STEEL OVERALL
  • Material Thickness: 0.018 INCHES NOMINAL IN
  • Style Designator: FLAT INTERNAL TEETH
  • Outside Diameter: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
  • Color: BLACK OVERALL
  • Surface Treatment: NICKEL OVERALL
  • Hole Diameter: 0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-187-7070, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Eaton Williams Group Ltd. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-187-7070
Primary Part Number1206
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerEaton Williams Group Ltd
StatusCANCELLED
MaterialSTEEL OVERALL
Material Thickness0.018 INCHES NOMINAL IN
Style DesignatorFLAT INTERNAL TEETH
Outside Diameter0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
ColorBLACK OVERALL
Surface TreatmentNICKEL OVERALL
Hole Diameter0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-011-55430912729-1 INTERCHANGEABLE
Washer,lock
Agco Corp Parts Opn
5331-00-054-6940DS-935601 INTERCHANGEABLE
O-Ring
Eaton Aerospace, Llc Dba Jackson South
4720-00-089-2022 INTERCHANGEABLE
Hose,nonmetallic
3110-00-144-8637015541 INTERCHANGEABLE
Bearing,ball,annular
Hyster-Yale Group, Inc. Dba Yale Materials Handling
6240-00-155-77991141 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
5310-00-167-0876 INTERCHANGEABLE
Washer,lock
3120-00-167-13842216 INTERCHANGEABLE
Bearing,washer,thrust
Triumph Engine Control Systems Llc
5930-00-253-17411G241 INTERCHANGEABLE
Switch,pressure
Custom Control Sensors, Llc
5120-00-293-0045 INTERCHANGEABLE
Pliers,retaining Ring
5330-00-319-1243 INTERCHANGEABLE
Packing,preformed
Cross-Reference Index
Part NumberManufacturer
1206 PRIMARY Eaton Williams Group Ltd (GBR)
221-6 Bosch Security Systems, Llc (USA)
551-90394 Gulton Industries Inc (USA)
1206-00 Itw Shakeproof Automotive Products (USA)
1206 Itw Shakeproof Automotive Products (USA)
709173-45 PRIMARY Naval Sea Systems Command (USA)
Related Parts
5310-00-011-5543INTERCHANGEABLE
WASHER,LOCK
0912729-1
5331-00-054-6940INTERCHANGEABLE
O-RING
DS-935601
4720-00-089-2022INTERCHANGEABLE
HOSE,NONMETALLIC
3110-00-144-8637INTERCHANGEABLE
BEARING,BALL,ANNULAR
015541
6240-00-155-7799INTERCHANGEABLE
LAMP,INCANDESCENT
1141
5310-00-167-0876INTERCHANGEABLE
WASHER,LOCK
3120-00-167-1384INTERCHANGEABLE
BEARING,WASHER,THRUST
2216
5930-00-253-1741INTERCHANGEABLE
SWITCH,PRESSURE
1G241
5120-00-293-0045INTERCHANGEABLE
PLIERS,RETAINING RING
5330-00-319-1243INTERCHANGEABLE
PACKING,PREFORMED
2920-00-319-5048INTERCHANGEABLE
SLEEVE,IGNITION TERMINAL
2216
5330-00-345-0246INTERCHANGEABLE
PACKING ASSEMBLY
0102216-9

Frequently Asked Questions

What is NSN 5310-00-187-7070?

NSN 5310-00-187-7070 is a Washer,lock, manufactured by Eaton Williams Group Ltd, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-187-7070?

NSN 5310-00-187-7070 has 6 cross-referenced part numbers: 1206 (Eaton Williams Group Ltd), 221-6 (Bosch Security Systems, Llc), 551-90394 (Gulton Industries Inc), 1206-00 (Itw Shakeproof Automotive Products), 1206 (Itw Shakeproof Automotive Products) and 1 more.

What NSN replaces 5310-00-187-7070?

There are 12 known substitutes for 5310-00-187-7070: 5310-00-011-5543, 5331-00-054-6940, 4720-00-089-2022 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1206?

Key specifications for 1206: Material: STEEL OVERALL; Material Thickness: 0.018 INCHES NOMINAL IN; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-187-7070 still in active supply?

NSN 5310-00-187-7070 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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