Nas1056 Spacers Today

| ID (in) | Corresponding NAS Bolt Size | OD (in) | |---------|----------------------------|---------| | 0.147–0.152 | #6 | 0.250 | | 0.189–0.194 | #10 | 0.3125 (5/16) | | 0.252–0.258 | 1/4″ | 0.375 (3/8) | | 0.314–0.320 | 5/16″ | 0.500 | | 0.377–0.383 | 3/8″ | 0.5625 (9/16) | | 0.502–0.508 | 1/2″ | 0.750 |

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: 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: | ID (in) | Corresponding NAS Bolt Size

1. What is NAS1056? NAS1056 is a military/aerospace standard (National Aerospace Standard) that defines the dimensional, material, and finish requirements for unthreaded, hollow, cylindrical spacers (also called standoffs or distance bushings). Key distinction: NAS1056 spacers are not threaded

| 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) |