PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D27111Washer,lock

Komatsu America Corporation · NSN 5310-00-543-5756 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-543-5756 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-543-5756. Primary manufacturer part number: D27111.
Features
  • Washer,lock — FSC 5310
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Surface Treatment: PASSIVATE OVERALL
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Nondefinitive Spec/std Data: 1 STYLE AND B OR C CLASS
  • Material Thickness: 0.126 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
  • Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
  • Outside Diameter: 1.082 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-543-5756, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Komatsu America Corporation. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-543-5756
Primary Part NumberD27111
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerKomatsu America Corporation
StatusCANCELLED
Style DesignatorSPLIT HELICAL-RIGHT HAND
Surface TreatmentPASSIVATE OVERALL
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Nondefinitive Spec/std Data1 STYLE AND B OR C CLASS
Material Thickness0.126 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
Hardness Rating35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
Outside Diameter1.082 INCHES NOMINAL IN
Hole Diameter0.636 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5310-00-018-7174 INTERCHANGEABLE
Washer,lock
5310-00-194-7350 INTERCHANGEABLE
Washer,lock
5310-00-194-7351 INTERCHANGEABLE
Washer,lock
2995-00-440-572127111 INTERCHANGEABLE
Bracket and Stud Assembly
Triumph Controls, Llc Dba Triumph Controls, Llc
5310-00-655-96319167216 INTERCHANGEABLE
Washer,lock
Us Army Aviation and Missile Command
3040-01-109-418727111 INTERCHANGEABLE
Cap,linear Actuating Cylinder
Moog Inc. Dba Ampac-Isp Corp
5950-01-109-681317317-0001 INTERCHANGEABLE
Reactor
Honeywell International Inc Dba Honeywell
3020-01-133-502934232P INTERCHANGEABLE
Pulley,groove
Alliance Laundry Systems Llc
5120-01-587-7204 INTERCHANGEABLE
Wrench,box and Open End,combinat
7530-01-610-598227010 INTERCHANGEABLE
Paper,copying,xerographic Proces
3 Star Papers Ltd Dba Limited Papers Div Limited Papers
Cross-Reference Index
Part NumberManufacturer
D27111 Komatsu America Corporation (USA)
27111 Komatsu America Corporation (USA)
MS35337-88 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
FFW84CLASSBSTYLE2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-018-7174INTERCHANGEABLE
WASHER,LOCK
5310-00-194-7350INTERCHANGEABLE
WASHER,LOCK
5310-00-194-7351INTERCHANGEABLE
WASHER,LOCK
2995-00-440-5721INTERCHANGEABLE
BRACKET AND STUD ASSEMBLY
27111
5310-00-655-9631INTERCHANGEABLE
WASHER,LOCK
9167216
3040-01-109-4187INTERCHANGEABLE
CAP,LINEAR ACTUATING CYLINDER
27111
5950-01-109-6813INTERCHANGEABLE
REACTOR
17317-0001
3020-01-133-5029INTERCHANGEABLE
PULLEY,GROOVE
34232P
5120-01-587-7204INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
7530-01-610-5982INTERCHANGEABLE
PAPER,COPYING,XEROGRAPHIC PROCES
27010

Frequently Asked Questions

What is NSN 5310-00-543-5756?

NSN 5310-00-543-5756 is a Washer,lock, manufactured by Komatsu America Corporation, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-543-5756?

NSN 5310-00-543-5756 has 4 cross-referenced part numbers: D27111 (Komatsu America Corporation), 27111 (Komatsu America Corporation), MS35337-88 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FFW84CLASSBSTYLE2 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-543-5756?

There are 10 known substitutes for 5310-00-543-5756: 5310-00-018-7174, 5310-00-194-7350, 5310-00-194-7351 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of D27111?

Key specifications for D27111: Style Designator: SPLIT HELICAL-RIGHT HAND; Surface Treatment: PASSIVATE OVERALL; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Nondefinitive Spec/std Data: 1 STYLE AND B OR C CLASS. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-543-5756 still in active supply?

NSN 5310-00-543-5756 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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