NAS Bolts – Aerospace Bolts Interchange
Jet-Tek is a manufacturer and distributor of NAS Bolts. Blanks in all diameters available which can be completed in 2-3
weeks based on your requirement. Parts include Manufacturer and material certifications with chemical and physical test
reports at no charge. Contact us at (800) 804-7876 for a free quote, or please
submit a RFQ here.NAS Bolts Series
NAS6203 – NAS6210
NAS6303 – NAS6310
NAS6603 – NAS6610
NAS6703 – NAS6710
The following charts detail material specifications, strength and temperature ratings, nominal
thread lengths, and updates/interchanges of the most commonly used aerospace bolt series.
NAS Bolts – Hex Head
125,000 Dsi tensile / 75,000 Dsi shear
AN3: alloy steel, 450°F
AN3C: stainless steel, 450°F
160,000 Dsi tensile/ 95,000 psi shear
NAS1103: Alloy steel, 450°F NAS6703: A286 stainless, 1200°F
NAS6203: Alloy steel, 450°F NAS653: Titanium alloy, 500°F
NAS1303: Alloy steel, 450°F NAS673: Titanium alloy, 500°F
NAS6603: Alloy steel, 450°F NAS6403: Titanium alloy, 500°F
NAS6303: A286 stainless, 1200°F NAS6803: Titanium alloy, 500°F
Supersedence Commonly Accepted Interchanges
NAS1103 to NAS6203 NAS1103, NAS6203
NAS1303 to NAS6603 NAS1303, NAS6603
NAS Bolts – Internal Wrenching Head – 12 Point Head
160,000 psi tensile / 96,000 psi shear 180,000 psi tensile / 108,000 psi shear
NAS144: alloy steel, 450°F (internal wrenching) NAS624: alloy steel, 450°F (12 point)
MS20004: alloy steel, 450°F (internal wrenching) MS21250: alloy steel, 450°F (12 point)
Supersedence Commonly Accepted Interchanges
NAS144 to MS20004 NAS624 and MS21250
NAS144 and MS20004
Thread Sizes and Nominal Thread Lengths Chart
Note: “x” or “xx” represents diameter number; all dimensions are in inches
| Dia. Number | Thread Size | Alloy Steel | A286 Stainless | 6AL4v Titanium Alloy | Alloy Steel | ||||||||||
| 11xx | 62xx | 13xx | 66xx | 63xx | 67xx | 65xx | 67xx | 64xx | 68xx | ANx | MS2000x | MS21250 | NAS62x | ||
| 3 | .190-32 | .276 | .323 | .338 | .345 | .323 | .345 | .276 | .338 | .323 | .345 | .406 | N/A | .420 | N/A |
| 4 | .250-28 | .316 | .370 | .425 | .425 | .370 | .425 | .316 | .425 | .370 | .425 | .469 | .475 | .492 | .485 |
| 5 | .3125-24 | .375 | .438 | .469 | .469 | .438 | .469 | .375 | .469 | .438 | .469 | .531 | .537 | .579 | .572 |
| 6 | .375-24 | .391 | .454 | .578 | .578 | .454 | .578 | .391 | .578 | .454 | .578 | .641 | .662 | .625 | .619 |
| 7 | .4375-20 | .45 | .528 | .594 | .694 | .528 | .694 | .453 | .594 | .528 | .694 | .656 | .787 | .721 | .694 |
| 8 | .500-20 | .453 | .528 | .735 | .735 | .528 | .735 | .453 | .735 | .528 | .735 | .781 | .787 | .768 | .741 |
| 9 | .563-18 | .511 | .594 | .840 | .840 | .594 | .840 | – | – | .594 | .840 | .906 | .850 | .852 | .826 |
| 10 | .625-18 | .543 | .626 | .902 | .902 | .626 | .902 | – | – | .626 | .902 | .953 | .912 | .899 | .873 |
| 12 | .750-16 | .572 | .666 | 1.041 | 1.041 | .666 | 1.041 | – | – | .666 | 1.041 | 1.093 | 1.037 | 1.036 | .993 |