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Tolerances are very tight – typically ±0.002″ on ID and OD, ±0.005″ on length. NAS1056 allows several material/finish combinations per the standard. Common choices:
| Parameter | Symbol | Typical Range / Notes | |-----------|--------|------------------------| | | A | Matches NAS bolt diameter (e.g., #10, 1/4, 5/16, 3/8, 1/2 inch) | | Nominal OD | B | Fixed per dash number (see table below) | | Length | L | From 0.125″ to 2.000″ in 1/16″ increments (dash number indicates length in 16ths) | nas1056 spacers
These spacers are designed for use with (typically NAS bolts) in structural and non-structural assemblies where precise spacing, alignment, or load transfer is needed without threading. Key distinction: NAS1056 spacers are not threaded . They are precision-ground tubes. For threaded standoffs, see NAS1398 or NAS1399. 2. Dimensional Specifications (Inch System) All NAS1056 spacers are defined by three critical dimensions: Tolerances are very tight – typically ±0
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