PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21056L3KNut,self-Locking,plate

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-01-048-6105 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-048-6105 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-048-6105. Primary manufacturer part number: MS21056L3K.
Features
  • Nut,self-Locking,plate — FSC 5310
  • Material: IRON ALLOY 660 OVERALL
  • Nut Length: 0.653 INCHES MAXIMUM IN
  • Nut Style: PLATE
  • Plate Thickness: 0.047 INCHES MAXIMUM IN
  • Nut Counterbore Depth: 0.062 INCHES MINIMUM NUT IN
  • Nut Mounting Provision: COUNTERSUNK HOLES OR DIMPLED HOLES
  • Mounting Provision Location: OPPOSITE NUT PROJECTION SIDE
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Iron Alloy 660 Overall construction
General Description

The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-048-6105, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 10 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-048-6105
Primary Part NumberMS21056L3K
Item NameNut,self-Locking,plate
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
MaterialIRON ALLOY 660 OVERALL
Nut Length0.653 INCHES MAXIMUM IN
Nut StylePLATE
Plate Thickness0.047 INCHES MAXIMUM IN
Nut Counterbore Depth0.062 INCHES MINIMUM NUT IN
Nut Mounting ProvisionCOUNTERSUNK HOLES OR DIMPLED HOLES
Mounting Provision LocationOPPOSITE NUT PROJECTION SIDE
Distance From Aperture Center to Mounting Hole Center0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
Mounting Hole Diameter0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
Temp Rating450.0 FAHRENHEIT NOMINAL DEGF
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Mounting Hole Countersink Angle100.0 DEGREES NOMINAL
Nut Height0.250 INCHES MAXIMUM IN
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Thread Class3B
LubricationDRY FILM LUBRICANT
Mounting Hole Arrangement Style2 HOLES
Hardness Rating49.0 ROCKWELL C MAXIMUM
Nominal Thread Size0.190 INCHES IN
Counterbore Diameter0.194 INCHES MINIMUM NUT IN
Thread DirectionRIGHT-HAND
Thread Quantity Per Inch32
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-773-8657MS21056L3 INTERCHANGEABLE
Nut,self-Locking,plate
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
12720E-02BC Sps Technologies, Llc Dba Aerospace Fasteners Group Div Aerospace - Santa Ana (USA)
R3000C3MK Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA)
K3001-3BC Howmet Global Fastening Systems Inc. Div Microdot Products (USA)
RMLHTA55-2860-02BC Harvard Industries Inc (USA)
MS21056L3K Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS21056L3K PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
NASM21056 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
T7C1032BCM Republic Fastener Mfg. Corp. Use CAGE Code 52828 for Cataloging. (USA)
T7C1032BCM Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace (USA)
K3001-3BC Howmet Global Fastening Systems Inc (USA)
12720E-02BC Sps Technologies, Llc Dba PB Fasteners (USA)
NAS684C3MK National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
5310-00-773-8657INTERCHANGEABLE
NUT,SELF-LOCKING,PLATE
MS21056L3

Frequently Asked Questions

What is NSN 5310-01-048-6105?

NSN 5310-01-048-6105 is a Nut,self-Locking,plate, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-048-6105?

NSN 5310-01-048-6105 has 12 cross-referenced part numbers: 12720E-02BC (Sps Technologies, Llc Dba Aerospace Fasteners Group Div Aerospace - Santa Ana), R3000C3MK (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), K3001-3BC (Howmet Global Fastening Systems Inc. Div Microdot Products), RMLHTA55-2860-02BC (Harvard Industries Inc), MS21056L3K (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 7 more.

What NSN replaces 5310-01-048-6105?

There is 1 known substitute for 5310-01-048-6105: 5310-00-773-8657. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21056L3K?

Key specifications for MS21056L3K: Material: IRON ALLOY 660 OVERALL; Nut Length: 0.653 INCHES MAXIMUM IN; Nut Style: PLATE; Plate Thickness: 0.047 INCHES MAXIMUM IN. 22 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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