PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571TYPEANut,plain,castellated,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-012-5013 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-012-5013 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-012-5013. Primary manufacturer part number: FFB571TYPEA.
Features
  • Nut,plain,castellated,hexagon — FSC 5310
  • Width Across Flats: 0.438 INCHES NOMINAL IN
  • Material Document and Classification: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Class: 2B
  • Material: STEEL OVERALL
  • Surface Treatment: CADMIUM OR ZINC OVERALL
  • Nut Height: 0.281 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-012-5013, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 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
NSN5310-00-012-5013
Primary Part NumberFFB571TYPEA
Item NameNut,plain,castellated,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Width Across Flats0.438 INCHES NOMINAL IN
Material Document and ClassificationQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Class2B
MaterialSTEEL OVERALL
Surface TreatmentCADMIUM OR ZINC OVERALL
Nut Height0.281 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut StyleCASTELLATED, HEXAGON
Thread SeriesUNF
Thread Quantity Per Inch28
Nominal Thread Size0.250 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5905-00-107-48812100-3154 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Keysight Technologies Inc
5815-00-129-1935125013 INTERCHANGEABLE
Capacitor Mounting
Telemechanics Inc
2815-00-573-1229125013 INTERCHANGEABLE
Tappet
Brinkley Technology Group Llc Dba Hercules Manufacturing
5910-00-872-3175125-013 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
General Instrument Corporation Dba Motorola Div Motorola Mobility - Home Division
Cross-Reference Index
Part NumberManufacturer
FFB571TYPEA Federal Specifications Promulgated by General Services Administration Washington DC (USA)
125013 CAGE 00000
AC334 Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
AC334 Lift Parts Mfg Co Inc Div of Echlin Mfg Co the (USA)
BBFX1A1 CAGE 00000
A331906 CAGE 00000
AC334 Tvh Parts Co. (USA)
Related Parts
5905-00-107-4881INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-3154
5815-00-129-1935INTERCHANGEABLE
CAPACITOR MOUNTING
125013
2815-00-573-1229INTERCHANGEABLE
TAPPET
125013
5910-00-872-3175INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
125-013

Frequently Asked Questions

What is NSN 5310-00-012-5013?

NSN 5310-00-012-5013 is a Nut,plain,castellated,hexagon, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-012-5013?

NSN 5310-00-012-5013 has 7 cross-referenced part numbers: FFB571TYPEA (Federal Specifications Promulgated by General Services Administration Washington DC), 125013, AC334 (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div), AC334 (Lift Parts Mfg Co Inc Div of Echlin Mfg Co the), BBFX1A1 and 2 more.

What NSN replaces 5310-00-012-5013?

There are 4 known substitutes for 5310-00-012-5013: 5905-00-107-4881, 5815-00-129-1935, 2815-00-573-1229 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571TYPEA?

Key specifications for FFB571TYPEA: Width Across Flats: 0.438 INCHES NOMINAL IN; Material Document and Classification: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Class: 2B; Material: STEEL OVERALL. 12 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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