PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

373678Nut,self-Locking,extended Washer

Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix · NSN 5310-00-652-3406 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-652-3406 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-652-3406. Primary manufacturer part number: 373678.
Features
  • Nut,self-Locking,extended Washer — FSC 5310
  • Washer Outside Diameter: 1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
  • Material: STEEL COMP 4340 OVERALL
  • Locking Feature: PREVAILING TORQUE ALL METAL DESIGN
  • Washer Thickness: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
  • Thread Series: UNEF
  • Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
  • Thread Quantity Per Inch: 20
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4340 Overall construction
General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-652-3406, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN5310-00-652-3406
Primary Part Number373678
Item NameNut,self-Locking,extended Washer
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHoneywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
StatusACTIVE
Washer Outside Diameter1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
MaterialSTEEL COMP 4340 OVERALL
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Washer Thickness0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
Thread SeriesUNEF
Hardness Rating34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
Thread Quantity Per Inch20
Features ProvidedCASEHARDENED
Nominal Thread Size0.938 INCHES IN
Countersink Angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM NUT
Width Across Flats1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Thread Class2B
Material Document and ClassificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5360-01-164-442600383-P INTERCHANGEABLE
Spring,helical,compression
Amerex Corporation Dba Amerex Corp
Cross-Reference Index
Part NumberManufacturer
00383 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
373678 Honeywell International Inc. Div Aerospace - Torrance (USA)
373678 PRIMARY Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
373678 Alliedsignal Inc Dba Allied-Signal Aerospace Co (USA)
Related Parts
5360-01-164-4426INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
00383-P

Frequently Asked Questions

What is NSN 5310-00-652-3406?

NSN 5310-00-652-3406 is a Nut,self-Locking,extended Washer, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-652-3406?

NSN 5310-00-652-3406 has 4 cross-referenced part numbers: 00383 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 373678 (Honeywell International Inc. Div Aerospace - Torrance), 373678 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), 373678 (Alliedsignal Inc Dba Allied-Signal Aerospace Co).

What NSN replaces 5310-00-652-3406?

There is 1 known substitute for 5310-00-652-3406: 5360-01-164-4426. Verify interchangeability with system specifications before substitution.

What are the specifications of 373678?

Key specifications for 373678: Washer Outside Diameter: 1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN; Material: STEEL COMP 4340 OVERALL; Locking Feature: PREVAILING TORQUE ALL METAL DESIGN; Washer Thickness: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN. 16 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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