PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FF-S-85Bolt,machine

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5306-00-008-3693 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-008-3693 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-008-3693. Primary manufacturer part number: FF-S-85.
Features
  • Bolt,machine — FSC 5306
  • Head Height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
  • Minimum Tensile Strength: 120000 POUNDS PER SQUARE INCH LBS
  • Surface Finish: 63.0 MICROINCHES THREADS
  • Shank Unthreaded Hole Diameter: 0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Diameter: 0.312 INCHES IN
  • Features Provided: FINISHED HEAD
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-008-3693, 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 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-008-3693
Primary Part NumberFF-S-85
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Head Height0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
Minimum Tensile Strength120000 POUNDS PER SQUARE INCH LBS
Surface Finish63.0 MICROINCHES THREADS
Shank Unthreaded Hole Diameter0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Diameter0.312 INCHES IN
Features ProvidedFINISHED HEAD
Thread DirectionRIGHT-HAND
MaterialSTEEL OVERALL
Thread Quantity Per Inch18
Thread Class2A A
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Material Document and ClassificationSAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nondefinitive Spec/std Data2 TYPE AND 10P STYLE AND 5 GRADE
Surface Treatment Document and ClassificationQQ-P-416 TY2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Hardness Rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
Distance From Head Largest Bearing Surface to Shank Hole Center0.584 INCHES MINIMUM AND 0.635 INCHES MAXIMUM FIRST HOLE IN
Fastener Length0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
Thread Length0.750 INCHES MAXIMUM IN
Head StyleHEXAGON
Width Between Flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5306-00-225-8516MS90725-52 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-225-9095MS90726-40 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-226-4824AEB02C312625WA6AA1 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-226-4838AEB02C312C25AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-226-4840B1821BH031C375N SUCCESSOR
Bolt,machine
American National Standards Institute Incorporated Dba American National Standards Institute
Bolt,machine
5306-00-469-0516000-14671PC60 SUCCESSOR
Bolt,machine
Sparling Instruments, Incorporated
5306-00-050-1237AEB02F312625AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-051-4086B1821BH031F300N SUCCESSOR
Bolt,machine
American National Standards Institute Incorporated Dba American National Standards Institute
5306-00-051-4087AEB02F312C25AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
Cross-Reference Index
Part NumberManufacturer
FF-S-85 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MS51105-332 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5306-00-225-8516SUCCESSOR
BOLT,MACHINE
MS90725-52
5306-00-225-9095SUCCESSOR
BOLT,MACHINE
MS90726-40
5306-00-226-4824SUCCESSOR
BOLT,MACHINE
AEB02C312625WA6AA1
5306-00-226-4838SUCCESSOR
BOLT,MACHINE
AEB02C312C25AW9A91
5306-00-226-4840SUCCESSOR
BOLT,MACHINE
B1821BH031C375N
5306-00-270-8275SUCCESSOR
BOLT,MACHINE
5306-00-469-0516SUCCESSOR
BOLT,MACHINE
000-14671PC60
5306-00-050-1237SUCCESSOR
BOLT,MACHINE
AEB02F312625AW9A91
5306-00-051-4086SUCCESSOR
BOLT,MACHINE
B1821BH031F300N
5306-00-051-4087SUCCESSOR
BOLT,MACHINE
AEB02F312C25AW9A91
5306-00-051-4091SUCCESSOR
BOLT,MACHINE
B1821BH031F425N
5306-00-051-4092SUCCESSOR
BOLT,MACHINE
B1821BH031F450N

Frequently Asked Questions

What is NSN 5306-00-008-3693?

NSN 5306-00-008-3693 is a Bolt,machine, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-008-3693?

NSN 5306-00-008-3693 has 2 cross-referenced part numbers: FF-S-85 (Federal Specifications Promulgated by General Services Administration Washington DC), MS51105-332 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5306-00-008-3693?

There are 12 known substitutes for 5306-00-008-3693: 5306-00-225-8516, 5306-00-225-9095, 5306-00-226-4824 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FF-S-85?

Key specifications for FF-S-85: Head Height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN; Minimum Tensile Strength: 120000 POUNDS PER SQUARE INCH LBS; Surface Finish: 63.0 MICROINCHES THREADS; Shank Unthreaded Hole Diameter: 0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE IN. 21 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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