NAS1953 through NAS1970 shear bolts, 108 ksi
The higher-strength airframe shear bolt: 108 ksi shear, long thread, #10-32 through 1-1/4 UNJF-3A, in alloy steel or A286.
NAS1953–NAS1970, machined to the standard.
NAS1953 through NAS1970 is the 108 ksi shear hex head bolt with a long thread. The base number is alloy steel (4140, 4340 or 8740, cadmium plated); a C after the number is A286. The last two digits give the diameter in sixteenths. The standard is active; AIA issued revision 8 in April 2024.
- Machined from certified bar to the standard; no hot heading
- AS9100D and ISO 9001:2015 quality system; CAGE 8HH90
- DFARS-compliant material available on request
- No minimum quantity; prototype through production
- Material test reports and certificates of conformance with the order
Send the full part number with the dash number and code letters, the quantity, the required delivery and the documentation your purchase order calls for.
NAS1953–NAS1970 at a glance
| Detail | Specification |
|---|---|
| Standard | NAS1953 thru NAS1970 (active, revision 8, 2024) |
| Title | Bolt, Shear, Hexagon Head, 108 KSI Shear, Long Thread |
| Material | Alloy steel, cadmium plated (no letter); A286 (C) |
| Thread | UNJF-3A, #10-32 through 1-1/4-12 |
| Strength | 108,000 psi minimum shear |
| Head | Hex head; drilled shank (D), drilled head (H) |
| Typical use | Airframe shear joints needing a higher-strength bolt than the 160 ksi series |
Part numbers covered: NAS1953 through NAS1970. Reference only; the current revision of the standard on your order governs.
Reading the part number.
| Element | Meaning |
|---|---|
| NAS19xx | Diameter in sixteenths: 53 = #10, 54 = 1/4, 56 = 3/8, 59 = 9/16 … 70 = 1-1/4 |
| C | A286 material |
| Dash number | Grip in 1/16 in. increments |
| D / H | Drilled shank / drilled head |
How Cyclone makes them
Bar stock certified to the material specification is cut, turned and threaded to the standard’s dimensions, with drilled heads or shanks and head markings as the part number requires. Plating and locking elements are applied through partner facilities to the standard.
Lead time
Quoted on each order. Because the parts are machined from bar rather than scheduled through a heading run, lead time is set by machining capacity and material availability. Ask for the current lead time with your RFQ.
Quality
Cyclone’s published certifications include AS9100D, AS9120B, ISO 9001:2015, API Spec Q1, API 20E and API 20F. See quality and certifications.
Documentation
Material test reports and certificates of conformance ship with the order. Additional inspection reports and documentation are quoted to the purchase order.
Questions before you quote
Does Cyclone quote the titanium version?
Titanium is on the Cyclone line card. Send the part number and we will confirm on the quote.
Does Cyclone stock these?
No. Every part is made to order from certified bar, which is why there is no minimum quantity and why the quote confirms sizes and lead time.
Can you quote a cancelled or superseded number?
Yes. Many MS sheets were reissued as NASM or SAE AS standards with the part numbers unchanged. Send the number on your drawing and the quote names the current document.