PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

STSWasher,lock

Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc · NSN 5310-01-546-2527 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-546-2527 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-546-2527. Primary manufacturer part number: STS.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 0.390 INCHES NOMINAL IN
  • Style Designator: FLAT EXTERNAL TEETH
  • Outside Diameter: 0.680 INCHES NOMINAL IN
  • Material Thickness: 0.036 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-546-2527, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-546-2527
Primary Part NumberSTS
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCdp Fastener Group, Inc. Dba Cdp Fastener Group Inc
StatusACTIVE
Hole Diameter0.390 INCHES NOMINAL IN
Style DesignatorFLAT EXTERNAL TEETH
Outside Diameter0.680 INCHES NOMINAL IN
Material Thickness0.036 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6550-01-340-0841 INTERCHANGEABLE
Specimen Collection and Transpor
6550-01-340-445553120-1 INTERCHANGEABLE
Specimen Collection and Transpor
Richard-Allan Scientific Llc
6550-01-340-54355330-1 INTERCHANGEABLE
Specimen Collection and Transpor
Richard-Allan Scientific Llc
5985-01-589-1300H280436-1 INTERCHANGEABLE
Seal,waveguide
Raytheon Company Div Corp
5340-01-598-8604STS INTERCHANGEABLE
Plate,mounting
Boyd Corporation (woburn) Inc
5985-01-600-0730STS INTERCHANGEABLE
Divider,power,radio Frequency
Spectrum Microwave, Inc.
6130-01-630-5286STS INTERCHANGEABLE
Power Supply
Arrow Electronics, Inc. Dba Arrow Electronics
7030-01-655-5736STS INTERCHANGEABLE
Serial Trkg Sys
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
5310-01-700-37788246122-1 INTERCHANGEABLE
Nut,plain,round
Raytheon Company Div Corp
6120-01-702-680932867 INTERCHANGEABLE
Transformer,power
Torotel, Inc. Div Torotel Products, Inc.
Cross-Reference Index
Part NumberManufacturer
STS Itw Shakeproof Automotive Products (USA)
STS PRIMARY Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc (USA)
H348739-13 Raytheon Company Div Corp (USA)
Related Parts
6550-01-340-0841INTERCHANGEABLE
SPECIMEN COLLECTION AND TRANSPOR
6550-01-340-4455INTERCHANGEABLE
SPECIMEN COLLECTION AND TRANSPOR
53120-1
6550-01-340-5435INTERCHANGEABLE
SPECIMEN COLLECTION AND TRANSPOR
5330-1
5985-01-589-1300INTERCHANGEABLE
SEAL,WAVEGUIDE
H280436-1
5340-01-598-8604INTERCHANGEABLE
PLATE,MOUNTING
STS
5985-01-600-0730INTERCHANGEABLE
DIVIDER,POWER,RADIO FREQUENCY
STS
6130-01-630-5286INTERCHANGEABLE
POWER SUPPLY
STS
7030-01-655-5736INTERCHANGEABLE
SERIAL TRKG SYS
STS
5310-01-700-3778INTERCHANGEABLE
NUT,PLAIN,ROUND
8246122-1
6120-01-702-6809INTERCHANGEABLE
TRANSFORMER,POWER
32867
5935-01-708-2882INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
G611141-4

Frequently Asked Questions

What is NSN 5310-01-546-2527?

NSN 5310-01-546-2527 is a Washer,lock, manufactured by Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-546-2527?

NSN 5310-01-546-2527 has 3 cross-referenced part numbers: STS (Itw Shakeproof Automotive Products), STS (Cdp Fastener Group, Inc. Dba Cdp Fastener Group Inc), H348739-13 (Raytheon Company Div Corp).

What NSN replaces 5310-01-546-2527?

There are 11 known substitutes for 5310-01-546-2527: 6550-01-340-0841, 6550-01-340-4455, 6550-01-340-5435 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of STS?

Key specifications for STS: Part Name Assigned by Controlling Agency: WASHER, LOCK - EXTERNAL TOOTH, CRES; Special Features: NOMINAL WASHER SIZE 3/8 (0.375); Hole Diameter: 0.390 INCHES NOMINAL IN; Style Designator: FLAT EXTERNAL TEETH. 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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