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Quality guaranteed We sell only warrantied and traceable partsPurchasing Sphere, owned and operated by ASAP Semiconductor, is an all-inclusive purchasing platform for hard-to-find and in-demand parts AN178-21A and components pertaining to the civil aviation, defense, aerospace, industrial, and electronic markets. An NSN is a 13-digit numeric code that serves to identify 'standardized material items of supply' as they have been recognized by all NATO countries and the United States Department of Defense. As such, we have an inventory of more than two billion new and obsolete parts, among which is a vast and diverse array of AN178-21A parts and much more. This includes items such as Bolt Close Toleranc AN178-21A from manufacturer Aeronautical Standards Group and many more, all of which are available with short lead times and competitive prices. For NSN parts, you won’t find a more inclusive source than Purchasing Sphere.
Our website offers a number of parametric search capabilities, one of which allows you to search specifically for AN178-21A parts. This means you can quickly sort through National Stock Numbers such as 5306007218158 and find parts from quality manufacturers like Aeronautical Standards Group and many others. To begin the purchasing process immediately, submit an RFQ today. Our team of dedicated account managers is standing by and will respond to all inquiries in 15 minutes or less.
| NSN | FSC | NIIN | CLS | Hazmat | DEMIL | Cancelled NSN |
|---|---|---|---|---|---|---|
| 5306-00-721-8158 Item Description: Bolt Close Toleranc | 5306 | 007218158 | 0 | N | ||
| CIIC | HCC | ESD | PMIC | Criticality | ENAC | |
| U | U | |||||
| Part Number | ISC | RNVC | RNCC | HCC | MSDS | SADC |
| An178-21a | 3 | 2 | 2 |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.781 INCHES MINIMUM |
| AASB | FASTENER LENGTH | 2.219 INCHES NOMINAL |
| AASK | HEAD STYLE | HEXAGON |
| AASU | HEAD HEIGHT | 0.265 INCHES MINIMUM AND 0.297 INCHES MAXIMUM |
| AATB | WIDTH BETWEEN FLATS | 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| AAUR | GRIP DIAMETER | 0.4986 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM OVERALL AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| CSYM | SURFACE FINISH | 63.0 MICROINCHES GRIP |
| MATT | MATERIAL | STEEL COMP 8740 OVERALL OR STEEL COMP 8630 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 4130 OVERALL OR STEEL COMP 4037 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OVERALL OR MIL-S-6758 MIL SPEC 5TH MATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| AHYM | NOMINAL THREAD DIAMETER | 0.500 INCHES |
| ANEE | GRIP LENGTH | 1.438 INCHES NOMINAL |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| CQBC | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| CSYM | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
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