NSN 5305-01-251-7552 BACB30LU443, BACB30LU4-43, 01-251-7552
Product Details | CLOSE TOLERANCE SCREW
5305-01-251-7552 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.
Part Alternates: BACB30LU443, BACB30LU4-43, 5305-01-251-7552, 01-251-7552, 5305012517552, 012517552
Hardware and Abrasives | Screws
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | 24 MAR 1987 | 01-251-7552 | 29294 ( SCREW, CLOSE TOLERANCE ) |
Drawings & Photos | NSN 5305-01-251-7552
Cross Reference | NSN 5305-01-251-7552
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| BACB30LU4-43 | 06710 | VALLEY-TODECO, INC. |
| BACB30LU4-43 | 06725 | SPS TECHNOLOGIES LLC DBA AIR INDUSTRIES |
| BACB30LU4-43 | 06950 | ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-43 | 17446 | HUCK INTERNATIONAL, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-43 | 17943 | FEDERAL MANUFACTURING CORPORATION |
| BACB30LU4-43 | 27624 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| BACB30LU4-43 | 56878 | SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION |
| BACB30LU4-43 | 57928 | SONIC INDUSTRIES INC. |
| BACB30LU4-43 | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP |
| BACB30LU4-43 | 81205 | THE BOEING COMPANY DBA BOEING |
| BACB30LU4-43 | 92215 | ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-43 | 97928 | HUCK INTL INC |
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Technical Data | NSN 5305-01-251-7552
| 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 | 2.914 INCHES MINIMUM AND 3.010 INCHES MAXIMUM |
| FASTENER LENGTH | 3.097 INCHES MINIMUM AND 3.122 INCHES MAXIMUM |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD STYLE | C50 FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | D1 CROSS RECESS TYPE 1 |
| GRIP LENGTH | 2.677 INCHES MINIMUM AND 2.697 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD 32.0 MICROINCHES THREADS |
Restrictions/Controls & Freight Information | NSN 5305-01-251-7552
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | A | Item does not contain precious metal |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||