PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LSSS25CWasher,lock

Bae Systems Information and Electronic Systems Integration Inc. · NSN 5310-00-167-0667 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-167-0667 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-167-0667. Primary manufacturer part number: LSSS25C.
Features
  • Washer,lock — FSC 5310
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OR AISI NATIONAL SPEC ALL MATERIAL RESPONSES OR SAE NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Surface Treatment: CADMIUM OVERALL
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Nondefinitive Spec/std Data: 1 STYLE AND A CLASS
  • Material Thickness: 0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-167-0667, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bae Systems Information and Electronic Systems Integration Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN5310-00-167-0667
Primary Part NumberLSSS25C
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerBae Systems Information and Electronic Systems Integration Inc.
StatusCANCELLED
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Material Document and Classification66 FED STD ALL MATERIAL RESPONSES OR AISI NATIONAL SPEC ALL MATERIAL RESPONSES OR SAE NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Surface TreatmentCADMIUM OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Nondefinitive Spec/std Data1 STYLE AND A CLASS
Material Thickness0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
Outside Diameter0.489 INCHES NOMINAL IN
Hole Diameter0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3030-00-288-086023425 INTERCHANGEABLE
Belt,v
Carlisle Power Transmission Products Inc
5310-00-582-5965196 INTERCHANGEABLE
Washer,lock
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
2520-00-769-651618391X INTERCHANGEABLE
Gear Set Differenti
Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products
5310-00-820-665523MS35337-44 INTERCHANGEABLE
Washer,lock
L3harris Cincinnati Electronics Corporation
5975-00-903-8859 INTERCHANGEABLE
Adapter,electrical Conduit
6110-00-941-211310176H71 INTERCHANGEABLE
Protector,thermal-Overload,elect
Eaton Corp Opns & Technical Center
5950-01-129-3479242-0595-260 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
9905-01-162-7160789 INTERCHANGEABLE
Plate,identification
Michigan Dynamics Inc
6515-01-230-4406789-L INTERCHANGEABLE
Splint,ankle
Surgical Appliance Industries Inc
6515-01-252-4161789-SMALL INTERCHANGEABLE
Splint,ankle
Otc Professional Appliance Div of Surgical Appliance Industries Inc
Cross-Reference Index
Part NumberManufacturer
LSSS25C Bae Systems Information and Electronic Systems Integration Inc. (USA)
A78-9 Borg-Warner Corp Marvel-Schebler/tillotson Div (USA)
MS35337-44 Optronic Und Nachrichtentechnik on Spectral Gmbh (DEU)
AN935-416L Aeronautical Standards Group Dept of Navy and Air Force (USA)
93618-716 Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA)
78-9 Borg-Warner Corp Marvel-Schebler/tillotson Div (USA)
93618-716 Lockheed Martin Corporation Dba Lockheed Martin Aerostructures Div Advanced Technology Laboratories (USA)
N405P12C15 General Electric Company (USA)
MS35337-44 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
3030-00-288-0860INTERCHANGEABLE
BELT,V
23425
5310-00-582-5965INTERCHANGEABLE
WASHER,LOCK
196
2520-00-769-6516INTERCHANGEABLE
GEAR SET DIFFERENTI
18391X
5310-00-820-6655INTERCHANGEABLE
WASHER,LOCK
23MS35337-44
5975-00-903-8859INTERCHANGEABLE
ADAPTER,ELECTRICAL CONDUIT
6110-00-941-2113INTERCHANGEABLE
PROTECTOR,THERMAL-OVERLOAD,ELECT
10176H71
5950-01-129-3479INTERCHANGEABLE
COIL,RADIO FREQUENCY
242-0595-260
9905-01-162-7160INTERCHANGEABLE
PLATE,IDENTIFICATION
789
6515-01-230-4406INTERCHANGEABLE
SPLINT,ANKLE
789-L
6515-01-252-4161INTERCHANGEABLE
SPLINT,ANKLE
789-SMALL
6515-01-340-7990INTERCHANGEABLE
SPLINT,ANKLE
789
6240-01-361-3499INTERCHANGEABLE
LAMP,INCANDESCENT

Frequently Asked Questions

What is NSN 5310-00-167-0667?

NSN 5310-00-167-0667 is a Washer,lock, manufactured by Bae Systems Information and Electronic Systems Integration Inc., classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-167-0667?

NSN 5310-00-167-0667 has 9 cross-referenced part numbers: LSSS25C (Bae Systems Information and Electronic Systems Integration Inc.), A78-9 (Borg-Warner Corp Marvel-Schebler/tillotson Div), MS35337-44 (Optronic Und Nachrichtentechnik on Spectral Gmbh), AN935-416L (Aeronautical Standards Group Dept of Navy and Air Force), 93618-716 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin) and 4 more.

What NSN replaces 5310-00-167-0667?

There are 12 known substitutes for 5310-00-167-0667: 3030-00-288-0860, 5310-00-582-5965, 2520-00-769-6516 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of LSSS25C?

Key specifications for LSSS25C: Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OR AISI NATIONAL SPEC ALL MATERIAL RESPONSES OR SAE NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Surface Treatment: CADMIUM OVERALL. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-167-0667 still in active supply?

NSN 5310-00-167-0667 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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