PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

99788Washer,lock

Eaton Aerospace, Llc Dba Jackson South · NSN 5310-00-012-3167 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-012-3167 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-012-3167. Primary manufacturer part number: 99788.
Features
  • Washer,lock — FSC 5310
  • Outside Diameter: 1.082 INCHES MAXIMUM IN
  • Nondefinitive Spec/std Data: 1 STYLE AND A CLASS
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Material Document and Classification: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
  • Material: STEEL OVERALL
  • Surface Treatment Document and Classification: MIL-P-16232,TYPE Z MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Material Thickness: 0.126 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-012-3167, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-012-3167
Primary Part Number99788
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusACTIVE
Outside Diameter1.082 INCHES MAXIMUM IN
Nondefinitive Spec/std Data1 STYLE AND A CLASS
Style DesignatorSPLIT HELICAL-RIGHT HAND
Material Document and ClassificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
MaterialSTEEL OVERALL
Surface Treatment Document and ClassificationMIL-P-16232,TYPE Z MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Thickness0.126 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Hole Diameter0.636 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN
Surface TreatmentPHOSPHATE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5310-00-011-6123MS35338-69 INTERCHANGEABLE
Washer,lock
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-391-96033636 INTERCHANGEABLE
Washer,flat
Telemechanics Inc
5930-00-454-2356 INTERCHANGEABLE
Switch,toggle
5985-01-164-4014123167 INTERCHANGEABLE
Waveguide
Frontgrade Technologies Inc.
Cross-Reference Index
Part NumberManufacturer
99788 Eaton Aerospace, Llc Dba Jackson South (USA)
123167 Army Weapons Command Attn Amswe-Ree-S (USA)
123167 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
MS35337-69 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
123167 General Motors Corp (USA)
91X112R Pressed Metals of America Inc (USA)
9X99788 Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
5310-00-011-6123INTERCHANGEABLE
WASHER,LOCK
MS35338-69
5310-00-391-9603INTERCHANGEABLE
WASHER,FLAT
3636
5930-00-454-2356INTERCHANGEABLE
SWITCH,TOGGLE
5985-01-164-4014INTERCHANGEABLE
WAVEGUIDE
123167

Frequently Asked Questions

What is NSN 5310-00-012-3167?

NSN 5310-00-012-3167 is a Washer,lock, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-012-3167?

NSN 5310-00-012-3167 has 7 cross-referenced part numbers: 99788 (Eaton Aerospace, Llc Dba Jackson South), 123167 (Army Weapons Command Attn Amswe-Ree-S), 123167 (Chrysler Realty Company Llc Dba Daimler Chrysler), MS35337-69 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 123167 (General Motors Corp) and 2 more.

What NSN replaces 5310-00-012-3167?

There are 4 known substitutes for 5310-00-012-3167: 5310-00-011-6123, 5310-00-391-9603, 5930-00-454-2356 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 99788?

Key specifications for 99788: Outside Diameter: 1.082 INCHES MAXIMUM IN; Nondefinitive Spec/std Data: 1 STYLE AND A CLASS; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL. 10 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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