Part Details | CLOSE TOLERANCE SCREW
5305-01-186-2166 A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
Alternate Parts: NAS4204U19, NAS4003, 5305-01-186-2166, 01-186-2166, 5305011862166, 011862166
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | AUG 08, 1984 | 01-186-2166 | 29294 ( SCREW, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON COUNTERSUNK
CROSS RECESS TYPE II
Cross Reference | NSN 5305-01-186-2166
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| NAS4204U19 | 80205 | NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES |
| NAS4003 | 80205 | NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES |
Technical Data | NSN 5305-01-186-2166
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.425 INCHES NOMINAL |
| FASTENER LENGTH | 1.598 INCHES MINIMUM AND 1.628 INCHES MAXIMUM |
| HEAD STYLE | 0 HEXAGON COUNTERSUNK |
| HEAD DIAMETER | 0.456 INCHES MINIMUM AND 0.508 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | 2 CROSS RECESS TYPE II |
| GRIP LENGTH | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM |
| GRIP DIAMETER | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| FEATURES PROVIDED | FINISHED HEAD |
| SPECIFICATION/STANDARD DATA | 80205-NAS4003 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 80205-NAS4204 TO CANCELED TO PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| NONDEFINITIVE SPEC/STD DATA | 1 CLASS AND A TYPE AND 3 TABLE AND 0.250-28 SIZE |
| SUPPLEMENTARY FEATURES | TRI-WING RECESS NO. NAS4000-6 |