PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS1297-4-20Bolt,shoulder

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5306-00-103-2873 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-103-2873 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-103-2873. Primary manufacturer part number: NAS1297-4-20.
Features
  • Bolt,shoulder — FSC 5306
  • Shoulder Diameter: 0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM FIRST SHOULDER IN
  • Thread Class: 3A A
  • Thread Direction: RIGHT-HAND
  • Shoulder Length: 1.260 INCHES MINIMUM AND 1.280 INCHES MAXIMUM FIRST SHOULDER IN
  • Head Height: 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
  • Thread Quantity Per Inch: 28
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4037 or Steel Comp 4130 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 8740 or Steel Comp 4140 Overall construction
General Description

The Bolt,shoulder, cataloged under National Stock Number 5306-00-103-2873, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 17 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-103-2873
Primary Part NumberNAS1297-4-20
Item NameBolt,shoulder
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Shoulder Diameter0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM FIRST SHOULDER IN
Thread Class3A A
Thread DirectionRIGHT-HAND
Shoulder Length1.260 INCHES MINIMUM AND 1.280 INCHES MAXIMUM FIRST SHOULDER IN
Head Height0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
Material Document and ClassificationMIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
Thread Quantity Per Inch28
Thread Series DesignatorUNF
Width Between Flats0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
Shoulder ShapeROUND FIRST SHOULDER
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Head StyleHEXAGON
Thread Length0.423 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
MaterialSTEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
Fastener Length1.703 INCHES MINIMUM AND 1.743 INCHES MAXIMUM IN
Nominal Thread Diameter0.250 INCHES IN
Surface Treatment Document and ClassificationQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
Bolt,close Tolerance
Bolt,close Tolerance
5306-00-151-3023AN9-41 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Bolt,clevis
Bolt,close Tolerance
Bolt,close Tolerance
Cross-Reference Index
Part NumberManufacturer
NASM6812 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
NAS1297-4-20 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
5306-00-630-2118SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-151-1944SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-151-3023SUCCESSOR
BOLT,MACHINE
AN9-41
5306-00-156-2293SUCCESSOR
BOLT,CLEVIS
5306-00-180-2759SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-584-7808SUCCESSOR
BOLT,CLOSE TOLERANCE

Frequently Asked Questions

What is NSN 5306-00-103-2873?

NSN 5306-00-103-2873 is a Bolt,shoulder, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-103-2873?

NSN 5306-00-103-2873 has 2 cross-referenced part numbers: NASM6812 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), NAS1297-4-20 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use).

What NSN replaces 5306-00-103-2873?

There are 6 known substitutes for 5306-00-103-2873: 5306-00-630-2118, 5306-00-151-1944, 5306-00-151-3023 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS1297-4-20?

Key specifications for NAS1297-4-20: Shoulder Diameter: 0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM FIRST SHOULDER IN; Thread Class: 3A A; Thread Direction: RIGHT-HAND; Shoulder Length: 1.260 INCHES MINIMUM AND 1.280 INCHES MAXIMUM FIRST SHOULDER IN. 17 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com