PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB584TYPE1CLASS1TYPEABolt,square Neck

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5306-00-248-8700 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-248-8700 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-248-8700. Primary manufacturer part number: FFB584TYPE1CLASS1TYPEA.
Features
  • Bolt,square Neck — FSC 5306
  • Head Diameter: 1.219 INCHES MINIMUM AND 1.344 INCHES MAXIMUM IN
  • Hardness Rating: 95.0 ROCKWELL B MAXIMUM OVERALL
  • Nondefinitive Spec/std Data: 1 TYPE AND A STYLE AND 1 CLASS
  • Material Document and Classification: FF-B-584 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Neck Width: 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN
  • Thread Quantity Per Inch: 11
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,square Neck, cataloged under National Stock Number 5306-00-248-8700, is classified within Federal Supply Class 5306 (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 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5306-00-248-8700
Primary Part NumberFFB584TYPE1CLASS1TYPEA
Item NameBolt,square Neck
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Head Diameter1.219 INCHES MINIMUM AND 1.344 INCHES MAXIMUM IN
Hardness Rating95.0 ROCKWELL B MAXIMUM OVERALL
Nondefinitive Spec/std Data1 TYPE AND A STYLE AND 1 CLASS
Material Document and ClassificationFF-B-584 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Neck Width0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN
Thread Quantity Per Inch11
Thread DirectionRIGHT-HAND
Fastener Length8.000 INCHES NOMINAL IN
Nominal Thread Diameter0.625 INCHES IN
Head Height0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
Neck Length0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
Thread Length1.750 INCHES MINIMUM IN
Minimum Tensile Strength55000 POUNDS PER SQUARE INCH LBS
Thread Class2A A
Surface TreatmentZINC OVERALL
MaterialSTEEL OVERALL
Head StyleBUTTON
Surface Treatment Document and ClassificationQQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5306-00-006-2269 (MS35751-53)
HAZMATNo
Verified Substitutes 12
5306-00-006-2269MS35751-53 SUCCESSOR
Bolt,square Neck
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Bolt,square Neck
5306-00-012-023121260 SUCCESSOR
Bolt,square Neck
Fastenal Company
5306-00-012-61984864282 ITEM 31 SUCCESSOR
Bolt,square Neck
Naval Ship Systems Command
Bolt,square Neck
Bolt,square Neck
Bolt,square Neck
Bolt,square Neck
Bolt,square Neck
Bolt,square Neck
Cross-Reference Index
Part NumberManufacturer
FFB584TYPE1CLASS1TYPEA Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FFB584 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
SUCCESSOR 5306-00-006-2269 Bolt,square Neck · MS35751-53
5306-00-011-9430SUCCESSOR
BOLT,SQUARE NECK
5306-00-012-0231SUCCESSOR
BOLT,SQUARE NECK
21260
5306-00-012-6198SUCCESSOR
BOLT,SQUARE NECK
4864282 ITEM 31
5306-00-012-6373SUCCESSOR
BOLT,SQUARE NECK
5306-00-012-6638SUCCESSOR
BOLT,SQUARE NECK
5306-00-012-6652SUCCESSOR
BOLT,SQUARE NECK
5306-00-044-5623SUCCESSOR
BOLT,SQUARE NECK
5306-00-054-8024SUCCESSOR
BOLT,SQUARE NECK
5306-00-058-0518SUCCESSOR
BOLT,SQUARE NECK
5306-00-058-9259SUCCESSOR
BOLT,SQUARE NECK
MS35751-32
5306-00-089-0174SUCCESSOR
BOLT,SQUARE NECK

Frequently Asked Questions

What is NSN 5306-00-248-8700?

NSN 5306-00-248-8700 is a Bolt,square Neck, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-248-8700?

NSN 5306-00-248-8700 has 2 cross-referenced part numbers: FFB584TYPE1CLASS1TYPEA (Federal Specifications Promulgated by General Services Administration Washington DC), FFB584 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5306-00-248-8700?

There are 12 known substitutes for 5306-00-248-8700: 5306-00-006-2269, 5306-00-011-9430, 5306-00-012-0231 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB584TYPE1CLASS1TYPEA?

Key specifications for FFB584TYPE1CLASS1TYPEA: Head Diameter: 1.219 INCHES MINIMUM AND 1.344 INCHES MAXIMUM IN; Hardness Rating: 95.0 ROCKWELL B MAXIMUM OVERALL; Nondefinitive Spec/std Data: 1 TYPE AND A STYLE AND 1 CLASS; Material Document and Classification: FF-B-584 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 19 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-248-8700 still in active supply?

NSN 5306-00-248-8700 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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