// TECHNICAL RESOURCES
NAS671 small-pattern plain hex nuts.
Compare selected NAS671 steel and stainless plain hex nuts, identify the required thread and request current pricing and availability from Webson.
// DIMENSION GUIDE
Nut thread, width across flats and height
Schematic only; not to scale. Letter labels are keys for this illustration. Use the applicable part specification for dimensions, tolerances and measurement conventions.
// PART IDENTIFICATION
A plain nut with a small-pattern hex
NAS671 covers small-pattern, nonstructural plain hex nuts. It is a nonlocking family: the series does not identify an all-metal or insert-type self-locking nut. The smaller hex envelope is part of the requirement, along with the thread and material.
Use the complete drawing callout when sourcing a replacement. A standard commercial hex nut with the same thread may have a different width or height.
// STOCKED SELECTION
Stocked NAS671 part numbers
No matching entries. Clear the filters or try a shorter search.
| Part number | Thread | Material / finish | Stock status | Request pricing |
|---|---|---|---|---|
| NAS671-4 | 4-40 UNJC-3B | Cadmium-plated steel | Stocked item | Quote NAS671-4 → |
| NAS671C4 | 4-40 UNJC-3B | Passivated CRES | Stocked item | Quote NAS671C4 → |
| NAS671-6 | 6-32 UNJC-3B | Cadmium-plated steel | Stocked item | Quote NAS671-6 → |
| NAS671C10 | 10-32 UNJF-3B | Passivated CRES | Stocked item | Quote NAS671C10 → |
| NAS671C2 | 2-56 UNJC-3B | Passivated CRES | Stocked item | Quote NAS671C2 → |
Stocked items are subject to prior sale. Request a quote to confirm current availability and lead time.
Thread and material entries support part identification. These selected records are not the full series, an acceptance drawing or a live inventory feed. Include the required specification issue and documentation with your inquiry.
// PART-NUMBER EXAMPLES
Read the material and size together
In the selected NAS671 references, a hyphen before the size identifies cadmium-plated carbon steel; C identifies passivated corrosion-resistant steel. NAS671-4 and NAS671C4 share the 4-40 thread reference but identify different material and finish requirements.
NAS671C10 is a 10-32 selection, while NAS671C2 is 2-56. Keep the full number rather than applying another nut family’s size-code rules.
// FAMILY COMPARISON
Plain and locking nuts serve different requirements
| Item | Reference |
|---|---|
| NAS671 | Small-pattern, nonstructural plain hex nut |
| NAS1291 | Low-height lightweight self-locking hex nut; selected C...M parts are all metal |
| MS21083 | Low-height self-locking hex nut with a nonmetallic insert |
This comparison helps identify a family. It does not establish interchangeability or approve a change to the assembly.
// SOURCE WITH WEBSON
What to include with your inquiry
Send the complete NAS671 designation, quantity, required delivery date and drawing or specification issue. Include any material, coating, approved-source or lot-documentation requirements. Webson can also review other NAS671 sizes for sourcing.
// BUYER CHECKLIST
Prepare the requirement for quotation
- Complete designation, including all material, finish and locking suffixes.
- Quantity, required delivery date and controlling drawing or specification issue.
- Required certificates, source restrictions and lot traceability.
// SOURCE WITH WEBSON
Have a part number or bill of material?
Send the complete designation, quantity, required delivery date and documentation requirements. Webson will review your requirement for quotation.