Part Details | MACHINE SCREW
5305-01-158-2021 An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.
Alternate Parts: 20028567, 11609886, 20028567, 5305-01-158-2021, 01-158-2021, 5305011582021, 011582021
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JUL 19, 1983 | 01-158-2021 | 06657 ( SCREW, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
Cross Reference | NSN 5305-01-158-2021
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 20028567 | 11862 | GENERAL MOTORS CORPCHEVROLET MOTOR DIV |
| 11609886 | 7X677 | GENERAL MOTORS LLCDBA GENERAL MOTORS |
| 20028567 | 7X677 | GENERAL MOTORS LLCDBA GENERAL MOTORS |
Technical Data | NSN 5305-01-158-2021
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | M |
| NOMINAL THREAD DIAMETER | 12.0 MILLIMETERS |
| THREAD PITCH IN MILLIMETERS | 1.75 |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 33.2 MILLIMETERS MINIMUM AND 34.8 MILLIMETERS MAXIMUM |
| FASTENER LENGTH | 36.00 MILLIMETERS MINIMUM AND 37.00 MILLIMETERS MAXIMUM |
| SCREW MATERIAL | STEEL COMP 4037 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT | CADMIUM AND CHROMATE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | GM 4341M CODE 20Z24,FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| HEAD STYLE | 8 DISHED HEXAGON |
| HEAD DIAMETER | 21.2 MILLIMETERS MINIMUM AND 22.0 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 6.3 MILLIMETERS MINIMUM AND 6.7 MILLIMETERS MAXIMUM |
| SPECIAL FEATURES | LEAD THREADS HARDENED TO ROCKWELL C 45.0 MIN. FILE TEST PER SAE J-864 |