NAS1160 and NAS1297 shoulder bolts
Hex head shoulder bolts for pivot and bearing joints: NAS1160 in A286 with a close-tolerance shoulder, NAS1297 in cadmium plated alloy steel.
NAS1160, NAS1297, machined to the standard.
NAS1160 is the close-tolerance A286 shoulder bolt, rated 95 ksi shear, passivated, with the first dash giving the thread size and the second the shoulder length in sixteenths; AIA issued revision 7 in March 2026. NAS1297 is the alloy steel hex head shoulder bolt, cadmium plated, with the same dash scheme and thread sizes from #6-32 up.
- 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.
NAS1160, NAS1297 at a glance
| Detail | Specification |
|---|---|
| Standard | NAS1160 (active, revision 7, 2026); NAS1297 (listed current) |
| Title | NAS1160: Bolt, Shoulder, Hex Head, Close Tolerance, CRES, A286, 95 KSI Fsu. NAS1297: Bolt, Shoulder, Hexagon Head |
| Material | NAS1160: A286 per AMS 5731 or 5737, passivated. NAS1297: alloy steel, cadmium plated |
| Thread | UNJF-3A / UNJC-3A, from #6-32 and #8-32 |
| Strength | NAS1160: 95,000 psi minimum shear |
| Typical use | Pivot, bearing and stripper-type joints |
Part numbers covered: NAS1160 (A286, close tolerance), NAS1297 (alloy steel). Reference only; the current revision of the standard on your order governs.
Reading the part number.
| Element | Meaning |
|---|---|
| First dash | Thread size code (06 = #6-32, 08 = #8-32, 3 = #10-32, 4 = 1/4-28, 5 = 5/16-24, 7 = 7/16-20) |
| Second dash | Shoulder length in sixteenths |
| D / H | Drilled variants as listed |
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
Can the shoulder be made to a drawing tolerance instead of the standard?
Yes. Send the drawing with the RFQ; the machining review confirms the tolerance.
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.