PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7H3937Washer,lock

Caterpillar Inc Div Caterpillar Defense · NSN 5310-00-209-2615 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-2615 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-2615. Primary manufacturer part number: 7H3937.
Features
  • Washer,lock — FSC 5310
  • Material: STEEL OVERALL
  • Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
  • Style Designator: FLAT EXTERNAL TEETH
  • Hole Diameter: 0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
  • Outside Diameter: 0.588 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
  • Nondefinitive Spec/std Data: B TYPE AND 1 CLASS AND 1 DESIGN
  • Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
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 5310-00-209-2615, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 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
NSN5310-00-209-2615
Primary Part Number7H3937
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
MaterialSTEEL OVERALL
Material Document and ClassificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Style DesignatorFLAT EXTERNAL TEETH
Hole Diameter0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
Outside Diameter0.588 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
Nondefinitive Spec/std DataB TYPE AND 1 CLASS AND 1 DESIGN
Hardness Rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Material Thickness0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-144-8662 INTERCHANGEABLE
Bearing,ball,annular
8040-00-171-1535 INTERCHANGEABLE
Adhesive
6150-00-252-23166065 INTERCHANGEABLE
Lead,storage Battery
893 Mfg, Llc
2805-00-306-56676065 INTERCHANGEABLE
Body,valve
R.h. Industries, Inc.
5330-00-447-3520432C WITH 261RHTB INTERCHANGEABLE
Packing Assembly
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
5950-00-454-55486065 INTERCHANGEABLE
Transformer,pulse
Pulse Engineering Inc
5930-00-876-84934347 INTERCHANGEABLE
Switch,thermostatic
Hdt Expeditionary Systems Inc
5960-00-930-78486065 INTERCHANGEABLE
Electron Tube
Vishay
5120-01-065-3333 INTERCHANGEABLE
Wrench,torque
5340-01-336-4251681 987 00 39 INTERCHANGEABLE
Bumper
Daimler Truck North America Llc
Cross-Reference Index
Part NumberManufacturer
G205665-9 Itw Shakeproof Automotive Products (USA)
FFW00100TYPEBDESIGN1CLASS1 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
7H3937 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
6065 PRIMARY Kato Engineering Inc. (USA)
9003000 PRIMARY Us Army Aviation and Missile Command (USA)
1118-00 Itw Shakeproof Automotive Products (USA)
G205665-9 American Telephone and Telegraph Co (USA)
G205665-9 At and T Corp (USA)
Related Parts
3110-00-144-8662INTERCHANGEABLE
BEARING,BALL,ANNULAR
8040-00-171-1535INTERCHANGEABLE
ADHESIVE
6150-00-252-2316INTERCHANGEABLE
LEAD,STORAGE BATTERY
6065
2805-00-306-5667INTERCHANGEABLE
BODY,VALVE
6065
5330-00-447-3520INTERCHANGEABLE
PACKING ASSEMBLY
432C WITH 261RHTB
5950-00-454-5548INTERCHANGEABLE
TRANSFORMER,PULSE
6065
5930-00-876-8493INTERCHANGEABLE
SWITCH,THERMOSTATIC
4347
5960-00-930-7848INTERCHANGEABLE
ELECTRON TUBE
6065
5120-01-065-3333INTERCHANGEABLE
WRENCH,TORQUE
5340-01-336-4251INTERCHANGEABLE
BUMPER
681 987 00 39
5330-01-424-3593INTERCHANGEABLE
RETAINER,PACKING
467529
6130-01-434-5604INTERCHANGEABLE
CHARGER,BATTERY
6065

Frequently Asked Questions

What is NSN 5310-00-209-2615?

NSN 5310-00-209-2615 is a Washer,lock, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-209-2615?

NSN 5310-00-209-2615 has 8 cross-referenced part numbers: G205665-9 (Itw Shakeproof Automotive Products), FFW00100TYPEBDESIGN1CLASS1 (Federal Specifications Promulgated by General Services Administration Washington DC), 7H3937 (Caterpillar Inc Div Caterpillar Defense), 6065 (Kato Engineering Inc.), 9003000 (Us Army Aviation and Missile Command) and 3 more.

What NSN replaces 5310-00-209-2615?

There are 12 known substitutes for 5310-00-209-2615: 3110-00-144-8662, 8040-00-171-1535, 6150-00-252-2316 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7H3937?

Key specifications for 7H3937: Material: STEEL OVERALL; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL; Style Designator: FLAT EXTERNAL TEETH; Hole Diameter: 0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-209-2615 still in active supply?

NSN 5310-00-209-2615 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.
PartsTable Design LLC · partstable.com